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 1998 Zuma Prebug Project (All help appreciated) 
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scooters and mods: 1998 Zuma Prebug
Post 1998 Zuma Prebug Project (All help appreciated)
Hey guys so I got a 1998 Zuma a few weeks ago from a friend for free and I have decided to just make this my project build since I have some spare time.

Some background: Living in australia. Temps here are 18-35 degrees C. I weigh about 121 pounds. So I was able to start up the scooter but it was in very bad shape (no airbox, wrong spark plugs and old fuel left for about 6+ months) and I knew there was plenty of damage done to the pistons since it has heat seized twice by me and once by my friend. I opened it up to see the pistons and there were about 15 deep scratches all around the piston. Due to this (and the poor performance of the scooter in general), I have decided to partially re-build this thing.

Some things I have bought from the help of a few people here are and what is needed are listed below.

-Athena 70cc BBK
https://www.ebay.com.au/itm/ATHENA-CYLI ... 2749.l2649

-BR9HS (compatible spark plugs for athena kit and plug chopping)
https://www.ebay.com.au/itm/NGK-Standar ... 2749.l2649

-Jet kit for delloroto 17.5mm Carb (I know these will be quite off but I'm sure it's manageable)
https://www.ebay.com.au/itm/10-x-M6-Thr ... 2749.l2649

-Carburettor Dellorto PHBN LS 17.5mm
https://www.scootertuning.ca/en/carbure ... &results=1

-x6 4gram rollers
https://www.ebay.com.au/itm/17mm-x-12mm ... 2749.l2649

Now while I am waiting for these parts I am still unsure about a few things.
1. I know this is a bit of a noobish question but I have never seen how an airbox is installed onto the carburettor. Do I just plug it in the air intake bit on the carburettor and screw it in or how do I do it?
2. Would you guys recommend removing the snorkel in the airbox with my build? If so why? and also how do I do it?
3. As you guys have seen I have gotten a 17.5mm dellorto cab which apparently comes ready for manual choke. I was wondering if I could use my stock throttle and manual choke cable and simply use it with this new carb?
4. Since I have a 70cc + 17.5mm carb kit I was hoping to gain a few kmh through the stock pipe. I heard there is washer in it (near the exhaust side) but I am not seeing anything. Is there any sort of restriciton on it? If so, where?
5. Before I start plug chopping I will need to break it in a bit. Do you guys recommend me using the max MJ ( or 90 with stock carb or 74-95 with the kit) to start off with or what would you guys recommend? I know after it has been broken in I can plug chop.
6. Adding on from Q5 what clip setting should I start off with? 1 up from the bottom? 1 down from the top? or in the middle? I have read people use all different settings so just wondering which clip setting would be best for me to break in as well as to plug chop with?
7. When plug chopping I was hoping to start off with a 95MJ and stop at around 90. I will be using the chinese kit so I know the sizes are not the same as mikuni's or stock dellorto ones. Is this fine or what MJ would I start with? (I am buying 6 plugs. One for idling/ breaking in. 4 for chopping. 1 for final. Therefore I have 4 plug chop settings I can try and hopefully nail it)
9. I am fairly light so I was thinking of putting in all six 4g rollers. Is this ok for my setup or should I mix it up a bit with 3 stock rollers of unknown mass (if someone knows what it is for a prebug 1998 please tell me)?
8. I highly do not want to buy a racing pipe so should I bother buying some clutch contra springs and yellow springs? I know I wont be able to do it myself as I do not have the tools so thats also another reason why I dont want to do it.

Thanks for your guys' help and I will be posting below as more parts come in and get installed.

ETA on parts:
plugs - Ready for installation
Airbox - Ready for installation
Carb - Ready for installation
rollers - Ready for installation
Jet kit - Ready for installation
Athena 70cc BBK - coming tommorow

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Last edited by Tassy on Wed May 01, 2019 9:44 pm, edited 2 times in total.



Sun Apr 21, 2019 5:37 am
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Joined: Fri Aug 31, 2018 5:18 pm
Posts: 600
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
Here is a detailed write upon how to install and tune a minarelli with picture that will show the air box .

http://49ccscoot.proboards.com/thread/556

So it will answer most of your question .

Leave the snorkle in revisit it this if you get a pipe and rechop

You are swapping delloto carbs so the manual choke and throttle will swap

Stock zuma pipe is unrestricted

Since your unsure of the jets start at 95 better to be 2 big
I would start in the middle and with the clip and reset it by throttle response after main jet is set .

Run the best looking of the 3 stock with 3 4 grams the stock rollers are between 6.5 and 7.5 whatever they had the day of set up .
This will put you in the mid 5's range and with your kit this will be close .
The 4's might be on the light side but perfect for future upgrades on the pipe .

Here is the service manual for the prebug
http://www.zumaforums.net/downloads.html

_________________
2004 Vinos Derestricted exhaust and variator stock carb with mikuni 70 main jet needle down 1 clip 40 mph
Athena Sport BBK waiting to go on

2004 Vino Malossi sport 70cc Malossi Wild Lion pipe malossi multivar 6.5 sliders green polini clutch springs stock carb 75 mikuni main one clip rich 47.5 mph Michelin S1 90/90/10 rear tire Michelin S1 3" x 10 up front

2004 Zuma Malossi sport 70 cc Technigas next r 2008 zuma torque driver polini high speed variator 5.5 grams sliders malossi delta clutch yellow contra yellow clutch springs Stock Carb 84 main jet 46 pilot jet needle 1 clip rich stock athena 14/42 gears 11 to 1 final ratio 56 mph

2005 Eton Beamer (Taiwan Zuma Clone) Airsal sport 70cc 9200 peak rpm top speed 42 77.5 mikuni jet needle 1 clip rich (sold)


Sun Apr 21, 2019 7:27 am
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Joined: Fri Aug 31, 2018 5:18 pm
Posts: 600
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
code-man26
Is a current poster running a athena on a bug eye he gets mid 50's mph and that is with stock carb per one of his last posts he is going with the 19mm delorto so you can compare notes .
And pm him
Your scoot is lighter and you have the 17.5 mm carb he has a size better gears and a lower end expansion pipe and stock carb.
So you have alot of potential if you build it and tune it right.

_________________
2004 Vinos Derestricted exhaust and variator stock carb with mikuni 70 main jet needle down 1 clip 40 mph
Athena Sport BBK waiting to go on

2004 Vino Malossi sport 70cc Malossi Wild Lion pipe malossi multivar 6.5 sliders green polini clutch springs stock carb 75 mikuni main one clip rich 47.5 mph Michelin S1 90/90/10 rear tire Michelin S1 3" x 10 up front

2004 Zuma Malossi sport 70 cc Technigas next r 2008 zuma torque driver polini high speed variator 5.5 grams sliders malossi delta clutch yellow contra yellow clutch springs Stock Carb 84 main jet 46 pilot jet needle 1 clip rich stock athena 14/42 gears 11 to 1 final ratio 56 mph

2005 Eton Beamer (Taiwan Zuma Clone) Airsal sport 70cc 9200 peak rpm top speed 42 77.5 mikuni jet needle 1 clip rich (sold)


Sun Apr 21, 2019 10:39 am
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Scooter Addict

Joined: Fri Apr 12, 2019 6:04 am
Posts: 133
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
zino18 wrote:
Here is a detailed write upon how to install and tune a minarelli with picture that will show the air box .

http://49ccscoot.proboards.com/thread/556

So it will answer most of your question .

Leave the snorkle in revisit it this if you get a pipe and rechop

You are swapping delloto carbs so the manual choke and throttle will swap

Stock zuma pipe is unrestricted

Since your unsure of the jets start at 95 better to be 2 big
I would start in the middle and with the clip and reset it by throttle response after main jet is set .

Run the best looking of the 3 stock with 3 4 grams the stock rollers are between 6.5 and 7.5 whatever they had the day of set up .
This will put you in the mid 5's range and with your kit this will be close .
The 4's might be on the light side but perfect for future upgrades on the pipe .

Here is the service manual for the prebug
http://www.zumaforums.net/downloads.html



Thanks for the info. I'm confident in setting up everything except the cable bit with the dellorto carbs. Does the kit which I bought from scooter tuning come with the cables? because I see in their description that the stock cables may work with the carb.

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Sun Apr 21, 2019 7:26 pm
Profile
Silver Member
Silver Member

Joined: Fri Aug 31, 2018 5:18 pm
Posts: 600
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
You would have to buy the cable seperate.

_________________
2004 Vinos Derestricted exhaust and variator stock carb with mikuni 70 main jet needle down 1 clip 40 mph
Athena Sport BBK waiting to go on

2004 Vino Malossi sport 70cc Malossi Wild Lion pipe malossi multivar 6.5 sliders green polini clutch springs stock carb 75 mikuni main one clip rich 47.5 mph Michelin S1 90/90/10 rear tire Michelin S1 3" x 10 up front

2004 Zuma Malossi sport 70 cc Technigas next r 2008 zuma torque driver polini high speed variator 5.5 grams sliders malossi delta clutch yellow contra yellow clutch springs Stock Carb 84 main jet 46 pilot jet needle 1 clip rich stock athena 14/42 gears 11 to 1 final ratio 56 mph

2005 Eton Beamer (Taiwan Zuma Clone) Airsal sport 70cc 9200 peak rpm top speed 42 77.5 mikuni jet needle 1 clip rich (sold)


Mon Apr 22, 2019 5:30 am
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Joined: Fri Apr 12, 2019 6:04 am
Posts: 133
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
Spark plugs arrived. Gonna gap them all to 0.8mm.

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Tue Apr 23, 2019 5:09 am
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Joined: Fri Apr 12, 2019 6:04 am
Posts: 133
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
zino18 wrote:
You would have to buy the cable seperate.



Hmm strange as I was able to use the stock cables and install the choke and throttle no problem for the carb.


Update:
Carb arrived.

Installed carb throttle and choke parts of carb. https://imgur.com/a/0GFUs2p

Bought quality 2 stroke oil to replace the cheapo oil I bought.
Previous oil: https://www.bunnings.com.au/powerfit-1l ... l_p3381278
New oil: https://www.supercheapauto.com.au/p/gul ... 12&start=0


Will moe over to full synthetic once 70cc bbk is broken in.

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Tue Apr 23, 2019 8:58 pm
Profile
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Joined: Fri Aug 31, 2018 5:18 pm
Posts: 600
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
Your lucky with that on the bug eyes we have to buy a new cable set up because we are going from dual cable throttle to 1 cable throttle on the dellorto.
Your going dellorto to dellorto .

from your pm
You will need to get a air shroud also the minnarelli cylinder head fins are not big enough to properly cool the engine by themselve so there is forced cooling by the fan.
The vertical air shroud is harder to source online I only found the horizontal ones at the dealers I buy from.
You might be stuck buying from delaer
You probably can get tubing from scootertuning just call them they are very helpful.

_________________
2004 Vinos Derestricted exhaust and variator stock carb with mikuni 70 main jet needle down 1 clip 40 mph
Athena Sport BBK waiting to go on

2004 Vino Malossi sport 70cc Malossi Wild Lion pipe malossi multivar 6.5 sliders green polini clutch springs stock carb 75 mikuni main one clip rich 47.5 mph Michelin S1 90/90/10 rear tire Michelin S1 3" x 10 up front

2004 Zuma Malossi sport 70 cc Technigas next r 2008 zuma torque driver polini high speed variator 5.5 grams sliders malossi delta clutch yellow contra yellow clutch springs Stock Carb 84 main jet 46 pilot jet needle 1 clip rich stock athena 14/42 gears 11 to 1 final ratio 56 mph

2005 Eton Beamer (Taiwan Zuma Clone) Airsal sport 70cc 9200 peak rpm top speed 42 77.5 mikuni jet needle 1 clip rich (sold)


Wed Apr 24, 2019 5:37 am
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Joined: Fri Apr 12, 2019 6:04 am
Posts: 133
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
zino18 wrote:
Your lucky with that on the bug eyes we have to buy a new cable set up because we are going from dual cable throttle to 1 cable throttle on the dellorto.
Your going dellorto to dellorto .

from your pm
You will need to get a air shroud also the minnarelli cylinder head fins are not big enough to properly cool the engine by themselve so there is forced cooling by the fan.
The vertical air shroud is harder to source online I only found the horizontal ones at the dealers I buy from.
You might be stuck buying from delaer
You probably can get tubing from scootertuning just call them they are very helpful.



Yeah adding from the PM I sent I will also remove the small panel revealing the VIN for a bit of air flow around the BBK.

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Thu Apr 25, 2019 5:58 am
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Joined: Fri Apr 12, 2019 6:04 am
Posts: 133
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
The airbox and rollers have finally arrived. Now just waiting on the jet kit, bbk and air shroud.

I will need to borrow an impact wrench as well as buy a new cvt gasket while changing the rollers (planning on x3 4g and x3 stock). I may also replace the belt if needed though I heard the OEM belts are quite expensive so I'm not sure.

I have marked all my 6 spark plugs as below when going for testing (I will NOT be using the 90 MJ that came with the carb while plug chopping as the kit I have will most likely have a different sizing system):

1. IDLE / WARMING UP ENGINE (no plug chop)
2. MJ 95 (plug chopped)
3. MJ 94 (plug chopped)
4. MJ 92 (plug chopped)
5. MJ 90 (plug chopped)
6. FINAL MJ (no plug chop)

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Tue Apr 30, 2019 5:00 pm
Profile
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Silver Member

Joined: Fri Aug 31, 2018 5:18 pm
Posts: 600
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
I think you will be close to dead on with those weights half and half
you could stuff a half gram of aluminum foil in your other 4 grams and see if it make much difference if you want to tune closer .
For me 5.2 -5.7 were identical for belt travel and acceleration . 7800-8000 rpms
4.7 belt travel was a little less 1 mph differnce maybe 2 but acceleration was there. 8500 rpms
6.4 and above accleration suffered belt travel was good top speed the same .
That is by the butt dyno , tach and speedometer.

As far as jets I bet you end up with the 92 or the 90 i would start with the 94 and only use the 95 in case you have to go up after your first run .
A buddy of mine showed me this he always adds 5 % round up to this formula as a starting point with a kit and 10% with a pipe and a kit for safety . So he told me for your set up 5 x 17.5 would 87.5 plus 5% would be a 93-94 should be rich .
https://www.tuningmatters.com/how-tos/h ... -jet-size/

That would be the stock dellotrto jets if they are knockoffs start at the 95 .

Alot of us mod are cover by drilling holes for cooling air flow so the cvt cover gasket does not get replaced .
We just run without one or you could just take the cover off and make your own by tracing it

The yamaha dealer in the states charge 40 bucks for a belt you will get good life out of them ,The knock off belts just dont have the life but cost 25-30 bucks

_________________
2004 Vinos Derestricted exhaust and variator stock carb with mikuni 70 main jet needle down 1 clip 40 mph
Athena Sport BBK waiting to go on

2004 Vino Malossi sport 70cc Malossi Wild Lion pipe malossi multivar 6.5 sliders green polini clutch springs stock carb 75 mikuni main one clip rich 47.5 mph Michelin S1 90/90/10 rear tire Michelin S1 3" x 10 up front

2004 Zuma Malossi sport 70 cc Technigas next r 2008 zuma torque driver polini high speed variator 5.5 grams sliders malossi delta clutch yellow contra yellow clutch springs Stock Carb 84 main jet 46 pilot jet needle 1 clip rich stock athena 14/42 gears 11 to 1 final ratio 56 mph

2005 Eton Beamer (Taiwan Zuma Clone) Airsal sport 70cc 9200 peak rpm top speed 42 77.5 mikuni jet needle 1 clip rich (sold)


Tue Apr 30, 2019 7:35 pm
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Joined: Fri Apr 12, 2019 6:04 am
Posts: 133
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
zino18 wrote:
I think you will be close to dead on with those weights half and half
you could stuff a half gram of aluminum foil in your other 4 grams and see if it make much difference if you want to tune closer .
For me 5.2 -5.7 were identical for belt travel and acceleration . 7800-8000 rpms
4.7 belt travel was a little less 1 mph differnce maybe 2 but acceleration was there. 8500 rpms
6.4 and above accleration suffered belt travel was good top speed the same .
That is by the butt dyno , tach and speedometer.

As far as jets I bet you end up with the 92 or the 90 i would start with the 94 and only use the 95 in case you have to go up after your first run .
A buddy of mine showed me this he always adds 5 % round up to this formula as a starting point with a kit and 10% with a pipe and a kit for safety . So he told me for your set up 5 x 17.5 would 87.5 plus 5% would be a 93-94 should be rich .
https://www.tuningmatters.com/how-tos/h ... -jet-size/

That would be the stock dellotrto jets if they are knockoffs start at the 95 .

Alot of us mod are cover by drilling holes for cooling air flow so the cvt cover gasket does not get replaced .
We just run without one or you could just take the cover off and make your own by tracing it

The yamaha dealer in the states charge 40 bucks for a belt you will get good life out of them ,The knock off belts just dont have the life but cost 25-30 bucks


I think I will just stick to 3 4g and 3 stock rollers as that should be enoough to be in the 5.2-5.7 weight range as you stated.

I think I will omit the 95 MJ test and start off with a 94 going down to 90 (probably even do the dellorto MJ 90 as well).

I don't understand what you said "Alot of us mod are cover by drilling holes for cooling air flow so the cvt cover gasket does not get replaced ." Can you please rephrase it. Something about not needing a gasket and drilling holes for air cooling?

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Wed May 01, 2019 1:32 am
Profile
Silver Member
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Joined: Fri Aug 31, 2018 5:18 pm
Posts: 600
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
When you run a lot of miles in a days run the clutch heats up and shifting changes so to cut down on the heat the case half with the kickstand can be drilled with holes .

Other just hacksaw a section back near the clutch where the two transmission halves come together so the gasket would be exposed .

So it keeps getting wrecked any way , So they just skip it or make there own with gasket paper or use a squeeze tube gasket maker like permatex which is what i used for to supplement the reed valve gasket and my exhaust to prevent leaks.

I am not running a gasket i wrecked it along time ago

_________________
2004 Vinos Derestricted exhaust and variator stock carb with mikuni 70 main jet needle down 1 clip 40 mph
Athena Sport BBK waiting to go on

2004 Vino Malossi sport 70cc Malossi Wild Lion pipe malossi multivar 6.5 sliders green polini clutch springs stock carb 75 mikuni main one clip rich 47.5 mph Michelin S1 90/90/10 rear tire Michelin S1 3" x 10 up front

2004 Zuma Malossi sport 70 cc Technigas next r 2008 zuma torque driver polini high speed variator 5.5 grams sliders malossi delta clutch yellow contra yellow clutch springs Stock Carb 84 main jet 46 pilot jet needle 1 clip rich stock athena 14/42 gears 11 to 1 final ratio 56 mph

2005 Eton Beamer (Taiwan Zuma Clone) Airsal sport 70cc 9200 peak rpm top speed 42 77.5 mikuni jet needle 1 clip rich (sold)


Wed May 01, 2019 6:21 am
Profile
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Joined: Fri Apr 12, 2019 6:04 am
Posts: 133
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
zino18 wrote:
When you run a lot of miles in a days run the clutch heats up and shifting changes so to cut down on the heat the case half with the kickstand can be drilled with holes .

Other just hacksaw a section back near the clutch where the two transmission halves come together so the gasket would be exposed .

So it keeps getting wrecked any way , So they just skip it or make there own with gasket paper or use a squeeze tube gasket maker like permatex which is what i used for to supplement the reed valve gasket and my exhaust to prevent leaks.

I am not running a gasket i wrecked it along time ago



Oh right I understand better now.

Update:
Jet kit came. I have installed the 94MJ and hopefully can swap in the rollers soon.

70cc kit coming in tommorow. Super excited as that'll give me the weekend and the holiday to get everything installed and fixed. Super keen!

Edit: Nevermind. I Can't actually start testing until the 2 stroke oil comes in :( It should come in 4-5 days.

_________________
'98 Zuma Prebug

70cc Athena w/ BR9HS, 17.5mm Carb (82MJ, clip 1 from bottom), 9.9:1 final drive, 4.4g rollers, LV 5k clutch springs, LV TT Pipe

Current max speed ~93kmh(58mph) @ 9.7k rpm

Build Project: viewtopic.php?f=48&t=28663


Wed May 01, 2019 9:42 pm
Profile
Silver Member
Silver Member

Joined: Fri Aug 31, 2018 5:18 pm
Posts: 600
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
And you need the 2 stroke oil for install any ways .
3 biggest tips
Put one wrist pin in at your bench or kitchen table.
So you only have to crawl around on the floor to put the other one in .

Put a rag in the engine while you are working on the reeds and wrist pin so nothing gets in .

Test fit the piston and cylinder and turn it over a few times by turning the fan manually to check for binding .

The thinnest base gasket is what everyone uses the squish will be at a very safe range with that kit they send all gaskets with every kit sport to race .

_________________
2004 Vinos Derestricted exhaust and variator stock carb with mikuni 70 main jet needle down 1 clip 40 mph
Athena Sport BBK waiting to go on

2004 Vino Malossi sport 70cc Malossi Wild Lion pipe malossi multivar 6.5 sliders green polini clutch springs stock carb 75 mikuni main one clip rich 47.5 mph Michelin S1 90/90/10 rear tire Michelin S1 3" x 10 up front

2004 Zuma Malossi sport 70 cc Technigas next r 2008 zuma torque driver polini high speed variator 5.5 grams sliders malossi delta clutch yellow contra yellow clutch springs Stock Carb 84 main jet 46 pilot jet needle 1 clip rich stock athena 14/42 gears 11 to 1 final ratio 56 mph

2005 Eton Beamer (Taiwan Zuma Clone) Airsal sport 70cc 9200 peak rpm top speed 42 77.5 mikuni jet needle 1 clip rich (sold)


Thu May 02, 2019 5:59 am
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