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 1998 Zuma Prebug Project (All help appreciated) 
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Scooterologist

Joined: Fri Apr 12, 2019 6:04 am
Posts: 109
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
Ok I have ordered the parts in

_________________
'98 Zuma Prebug
-70cc Athena BBK (BR9HS plug)
-Stage6 Straight Cut 14/42 Gears -> 9.9 : 1 final drive
-Stock variator (6g rollers -> 8mm sharpie test)
-17.5mm Dellorto Carb (84MJ, clip in middle position)

Current max speed ~67kmh (GPS verified)

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


Fri Jun 14, 2019 7:09 pm
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Scooterologist

Joined: Fri Apr 12, 2019 6:04 am
Posts: 109
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
OEM belt ordered. Currently going to be cleaning the old gasket off as i got some new ultra copper rtv.

Does anyone know how many restrictors are in the LV TT pipe? I know one is near the exhaust flange but Idk if there is any in the silencer area.

_________________
'98 Zuma Prebug
-70cc Athena BBK (BR9HS plug)
-Stage6 Straight Cut 14/42 Gears -> 9.9 : 1 final drive
-Stock variator (6g rollers -> 8mm sharpie test)
-17.5mm Dellorto Carb (84MJ, clip in middle position)

Current max speed ~67kmh (GPS verified)

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


Sat Jun 15, 2019 3:07 am
Profile
Bronze Member
Bronze Member

Joined: Fri Aug 31, 2018 5:18 pm
Posts: 405
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
Your parts list looks great .
The lo vince restriction i just in the exhaust falnge right near the end where it connect to cyinder.
Use a dremel or dill to knock off the weld .

The Leo I have actaully run with the a athena bbk.
You will be safe below 10 k and it is a noticeable upgrade over stock.
They are hard to get ahold of new over here without importanting from europe

_________________
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 derestricted stock variator stock carb 72 mikuni main one clip rich
45 mph still breaking in 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 82 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


Sun Jun 16, 2019 2:54 pm
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Scooterologist

Joined: Fri Apr 12, 2019 6:04 am
Posts: 109
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
Ok just opened up the clutch and the cluitch springs and contra look to be aftermarket. The clutch springs weren't even installed the correct way ( you know how one hook is slightly elongated compared to the other). I am thinking this aftermarket contra as well as the springs could have been affecting my take off as well as shifting to high gears. Well I'll see how much of a difference it makes when I install the new springs.

_________________
'98 Zuma Prebug
-70cc Athena BBK (BR9HS plug)
-Stage6 Straight Cut 14/42 Gears -> 9.9 : 1 final drive
-Stock variator (6g rollers -> 8mm sharpie test)
-17.5mm Dellorto Carb (84MJ, clip in middle position)

Current max speed ~67kmh (GPS verified)

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


Mon Jun 17, 2019 5:54 am
Profile
Bronze Member
Bronze Member

Joined: Fri Aug 31, 2018 5:18 pm
Posts: 405
Location: Fox Valley Wisconsin
scooters and mods: 2 2004 Vinos 2004 Zuma
Post Re: 1998 Zuma Prebug Project (All help appreciated)
Looks like you keep finding things to fix .
The leo comes with clutch springs to get you closer to the power band .

Just settled on the contra spring the white is ok but the yellow is so much better it down shifts and makes coming out of corners and up hill snappier it does make your weights act about 1/2 gram lighter .so if you were happy with 5 grams you will probably find 5.5 act the same Since the yellow spring tension needs heavier weights upfront.

The delta clutch has a ton of areas to dial in and tweek the stock clutch was easier just swap springs and contra so it took me longer to get to where i want to be with contra clutch springs and weights .

One other thing since you changed gears i just went over 800 miles since my gear change and changed the gear oil it was pretty dark from the gears wearing in so you might want to change that out before you turn 1000 miles .

_________________
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 derestricted stock variator stock carb 72 mikuni main one clip rich
45 mph still breaking in 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 82 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


Sat Jun 22, 2019 5:41 pm
Profile
Scooterologist

Joined: Fri Apr 12, 2019 6:04 am
Posts: 109
scooters and mods: 1998 Zuma Prebug
Post Re: 1998 Zuma Prebug Project (All help appreciated)
zino18 wrote:
Looks like you keep finding things to fix .
The leo comes with clutch springs to get you closer to the power band .

Just settled on the contra spring the white is ok but the yellow is so much better it down shifts and makes coming out of corners and up hill snappier it does make your weights act about 1/2 gram lighter .so if you were happy with 5 grams you will probably find 5.5 act the same Since the yellow spring tension needs heavier weights upfront.

The delta clutch has a ton of areas to dial in and tweek the stock clutch was easier just swap springs and contra so it took me longer to get to where i want to be with contra clutch springs and weights .

One other thing since you changed gears i just went over 800 miles since my gear change and changed the gear oil it was pretty dark from the gears wearing in so you might want to change that out before you turn 1000 miles .



Yeah I think I am going to still stick with the white contra as the difference apparently from scooter-attack is +30 (white) and +35% (yellow) from stock. I think with the malossi torque controller I should be able to get that extra bit of compression from the white to make it act like a yellow.

Yeah hopefully these LV springs are plug and play and i dont have to touch the clutch area anymore. I just bought a 39m socket as I didnt like going to a mechanic far away from me just to use their socket.

Yes I remember I made note when I first got the gears to change the oil after 500kms.


Update:
Reason for parts delay is because the white spring and the clutch bell is on back order. Waiting for malossi to pull through and quickly send the items out to scooter-attack so I can get them.

I have also installed the tachmeter but will test it later as I do not think it is a good idea to start the engine with no exhaust attached.

_________________
'98 Zuma Prebug
-70cc Athena BBK (BR9HS plug)
-Stage6 Straight Cut 14/42 Gears -> 9.9 : 1 final drive
-Stock variator (6g rollers -> 8mm sharpie test)
-17.5mm Dellorto Carb (84MJ, clip in middle position)

Current max speed ~67kmh (GPS verified)

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


Sat Jun 22, 2019 9:20 pm
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