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 Jdm97ek4's 70cc liquid cooled build thread 
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Post Jdm97ek4's 70cc liquid cooled build thread
new build thread, last one got deleted......


scoot 2004 yamaha zuma 50

mods.
stage 6 street race 70cc LC kit
SRT8 water pump
YZ 80 radiator
stage 6 NBR oversize reed cage
stage 6 .035 NBR glass reeds
stage 6 NBR intake manifold
ARRECHE 19mm carb
Motion pro throttle cable
UNI filter
MRP exhaust
stock vari
Dr Pulley 5g sliders
OEM rubber belt
NCY 107mm delta clutch
NCY 107mm race vented bell
NCY 1500 clutch springs
NCY 2000 contra
BWS 100 torque driver
Athena 14.42 up gears
Trail Tech vapor digital dash


70cc athena AC kit was fun but time to make some real power, so i went LC
install was smooth, radiator was tricky to find a place to mount and hide it but look clean
liquid cooled kit gave it 2-3 times the power on bottom end and midrange. top end still the same but may of lost a few mph
still revvs out to 11800-12000rpm at WOT stock crank. never let go yet. knock on wood

63mph gps and vid confirmed. but my tom tom is junk and in accurate so i will be using a garman and a droid gps soon

here are some picts

air cooled 70cc
Image

LC install
Image
Image
Image

water pump pulley driver issue
Image

driver issue fixed.
Image

radiator mouning
Image
Image
Image

semi clean finish i wish the lines didnt interfere with the plastic. but i will get the rad inlet.outlet re welded this winter in a diff spot for a cleaner fit.

nice leg warmer on cool nights too :)
98* days are not fun with a 150* rad blowing on your foot..


overall the kit runs great im estimating with mods im up around 12hp

Poini Big EVO 94cc kit soon to come :)


future mods
malossi over range kit
rotor ign for faster revs
stage 6 sport pro LC or the stage 6 R/T LC kit if there in stock....

_________________
2004 zuma "AKA TANK" 2t 70cc liquid cooled ;)
63mph flat ground gps confirmed

** SUMMER SALE Z50/125 FOOTRESTS 45.00 SHIPPED ** pm me for details

Zuma 50, Zuma 125 Highway pegs/Footrests, NEW LOOK/DESIGN 50.00 SHIPPED


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Sun Aug 14, 2011 11:46 pm
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
your power is actually around 9 to 10 hp.
Be ready to spend around 3 grand on your polini cylinder.


Mon Aug 15, 2011 12:51 am
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
I agree, 10 to 11hp with the pro pipe. May need a larger carb to get to the higher side of that. You should port that cylinder a little before spending the bucks on a new one. Or do it just before you are ready to order the other stuff. See what you can make it do. 65% on the width and raise the exhaust by 1mm. Smooth the transfers. Maybe even pull your cases and match the cylinder.


Mon Aug 15, 2011 6:14 am
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
buguy wrote:
I agree, 10 to 11hp with the pro pipe. May need a larger carb to get to the higher side of that. You should port that cylinder a little before spending the bucks on a new one. Or do it just before you are ready to order the other stuff. See what you can make it do. 65% on the width and raise the exhaust by 1mm. Smooth the transfers. Maybe even pull your cases and match the cylinder.


cases are ported for the 100cc kit to fit the large jug.

with a 70cc kit when install the base gasket i use honda bond where the gasket meets the cases to have a good seal

_________________
2004 zuma "AKA TANK" 2t 70cc liquid cooled ;)
63mph flat ground gps confirmed

** SUMMER SALE Z50/125 FOOTRESTS 45.00 SHIPPED ** pm me for details

Zuma 50, Zuma 125 Highway pegs/Footrests, NEW LOOK/DESIGN 50.00 SHIPPED


Image


Mon Aug 15, 2011 6:47 am
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
X7rocks wrote:
your power is actually around 9 to 10 hp.
Be ready to spend around 3 grand on your polini cylinder.



full big evo 94cc kit 1594.00 shipped

http://cgi.ebay.com/ebaymotors/POLINI-9 ... arQ5fParts


but. how reliable will it be? prob gotta run race gas, and 24mm carb with the kit. and my 1.2gallon tank will be empty in no time'

_________________
2004 zuma "AKA TANK" 2t 70cc liquid cooled ;)
63mph flat ground gps confirmed

** SUMMER SALE Z50/125 FOOTRESTS 45.00 SHIPPED ** pm me for details

Zuma 50, Zuma 125 Highway pegs/Footrests, NEW LOOK/DESIGN 50.00 SHIPPED


Image


Mon Aug 15, 2011 6:48 am
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Location: Gapan city, Philippines
Post Re: Jdm97ek4's 70cc liquid cooled build thread
i could probably run pump gas, V-Power or similar gasoline should do the job, squish clearance is paramount to make this kit work, don't ignore this or you'll turn that nice piece of technology into junk real quick. whatever the manual says about how much squish clearance you add 0.10mm more. if the manual says 0.50mm squish make it 0.60mm using a thicker base gasket.

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Overrev Tuning

Yamaha Aerox R
MHR Team 6T 70cc (max tuned) + MHR Team Crank + SKF 6204 TN9 C3 bearings + Malossi VL12 reedvalves + Yasuni C21 exhaust pipe + Keihin PWK28 carb + PVL digital inner rotor ignition + Polini Evo SS9 vario kit + Bando belt + Polini 128mm rear pulley + Malossi red vario spring + Malossi Torsion Controller + MHR black clutchsprings + Delta clutch + Wing bell+ Polini 15/42 gear kit + Malossi RS24 rear damper + Bridgestone Racing Battlax tires + Aprilia rally 12" wheels

my "humble" trackday toy, 90+mph.


Mon Aug 15, 2011 7:00 am
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
Damn, thats a chunk of change. But it sounds like it would be a LOT of fun!!!


Mon Aug 15, 2011 7:04 am
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scooters and mods: 96 Jog 05 Vino 08 C3 04 Super 9 00 SR
Post Re: Jdm97ek4's 70cc liquid cooled build thread
Then I would assume you could shim a bit more if you wanted a street set-up to run well on pump gas.


Mon Aug 15, 2011 7:06 am
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
jdm97ek4 wrote:
X7rocks wrote:
your power is actually around 9 to 10 hp.
Be ready to spend around 3 grand on your polini cylinder.



full big evo 94cc kit 1594.00 shipped

http://cgi.ebay.com/ebaymotors/POLINI-9 ... arQ5fParts


but. how reliable will it be? prob gotta run race gas, and 24mm carb with the kit. and my 1.2gallon tank will be empty in no time'



24mm kit, mani, ignition, transmission, lets tack on another 2 grand, be a bit more realistic and build something easier.
Your bank account will thank me later.


Mon Aug 15, 2011 10:33 am
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
X7rocks wrote:
jdm97ek4 wrote:
X7rocks wrote:
your power is actually around 9 to 10 hp.
Be ready to spend around 3 grand on your polini cylinder.



full big evo 94cc kit 1594.00 shipped

http://cgi.ebay.com/ebaymotors/POLINI-9 ... arQ5fParts


but. how reliable will it be? prob gotta run race gas, and 24mm carb with the kit. and my 1.2gallon tank will be empty in no time'



24mm kit, mani, ignition, transmission, lets tack on another 2 grand, be a bit more realistic and build something easier.
Your bank account will thank me later.


maby i will do a +2 stroker crank for more torque

_________________
2004 zuma "AKA TANK" 2t 70cc liquid cooled ;)
63mph flat ground gps confirmed

** SUMMER SALE Z50/125 FOOTRESTS 45.00 SHIPPED ** pm me for details

Zuma 50, Zuma 125 Highway pegs/Footrests, NEW LOOK/DESIGN 50.00 SHIPPED


Image


Mon Aug 15, 2011 11:59 am
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
24mm kit, mani, ignition, transmission, lets tack on another 2 grand, be a bit more realistic and build something easier.
Your bank account will thank me later.[/quote]

maby i will do a +2 stroker crank for more torque[/quote]


Honestly JDM, you can make your street race work really well, just port it a bit more, add an oko carb, a sport pro exhaust and you will have a good setup.


Mon Aug 15, 2011 3:07 pm
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
I think he already has a pro pipe, so he should be good there. How would an 24mm OKO be for all around riding?

Just saw the polini factory built 94's are using a 28mm Dell.


Last edited by buguy on Mon Aug 15, 2011 7:15 pm, edited 1 time in total.



Mon Aug 15, 2011 5:14 pm
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
X7rocks wrote:
24mm kit, mani, ignition, transmission, lets tack on another 2 grand, be a bit more realistic and build something easier.
Your bank account will thank me later.


maby i will do a +2 stroker crank for more torque[/quote]


Honestly JDM, you can make your street race work really well, just port it a bit more, add an oko carb, a sport pro exhaust and you will have a good setup.[/quote]


the cases are ported so big for the 100 kit the 70cc jug just seals

_________________
2004 zuma "AKA TANK" 2t 70cc liquid cooled ;)
63mph flat ground gps confirmed

** SUMMER SALE Z50/125 FOOTRESTS 45.00 SHIPPED ** pm me for details

Zuma 50, Zuma 125 Highway pegs/Footrests, NEW LOOK/DESIGN 50.00 SHIPPED


Image


Mon Aug 15, 2011 5:53 pm
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
OveRReV wrote:
i could probably run pump gas, V-Power or similar gasoline should do the job, squish clearance is paramount to make this kit work, don't ignore this or you'll turn that nice piece of technology into junk real quick. whatever the manual says about how much squish clearance you add 0.10mm more. if the manual says 0.50mm squish make it 0.60mm using a thicker base gasket.


you keep mentioning shell v-power gas. what is the octane of that in the Philippines?
in canada and in my province its only 91 octane. the highest we have is the ultra 94 which is sold at select gas stations (petro-canada. we no longer have sunoco)

can high end 70cc/94cc setups use a 94 octane without raising the squish? or would you require that 100ron to keep the squish at what the manual recommends

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buguy wrote:
A tool??!! We ride scooters...we all look like tools dude!


cathy_liebchen wrote:
Fast, Cheap, Reliable = Choose any 2. Can't have all 3


Mon Aug 15, 2011 6:14 pm
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Post Re: Jdm97ek4's 70cc liquid cooled build thread
jdm97ek4 wrote:
buguy wrote:
I agree, 10 to 11hp with the pro pipe. May need a larger carb to get to the higher side of that. You should port that cylinder a little before spending the bucks on a new one. Or do it just before you are ready to order the other stuff. See what you can make it do. 65% on the width and raise the exhaust by 1mm. Smooth the transfers. Maybe even pull your cases and match the cylinder.


cases are ported for the 100cc kit to fit the large jug.

with a 70cc kit when install the base gasket i use honda bond where the gasket meets the cases to have a good seal



JDM. If you opened up your cases for that 52mm cylinder and stroker crank, then you've got alot of work ahead of you to reclaim some of that primary compression befor you see any power from any 70 kit!!


Tue Aug 16, 2011 8:12 am
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