Tunning 72cc gdash

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Justinmarldizah
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Location: Hawaii

Tunning 72cc gdash

Post by Justinmarldizah » Sun Jan 31, 2016 3:17 am

Motor spec
Dd50 ported block
72cc polini bore
7 & 5 rolling weights
1500 contra spring
72 gdash pipe
28mm oko carb
Stage 2 uni filter pod

I had a pg long pipe and I was hitting more speed with it, any tips on tunning a gdash pipe? Thanks

Justinmarldizah
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Location: Hawaii

Re: Tunning 72cc gdash

Post by Justinmarldizah » Tue Feb 02, 2016 3:08 am

Drop weights still running worse than my pg

Meloshameless
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Re: Tunning 72cc gdash

Post by Meloshameless » Tue Feb 02, 2016 4:05 am

What grams is your weights? And is ur bore a corsa, or contessa? Use 6000 rpm clutch springs too, at the least. Get that bugga spinning before she goes.
2000 Honda SR (purple swurp)
corsa
naruku
polini 21 cp 36/106 pod filter
polini vari 5.5 gram
zx trans
Polini evo2 clutch/bell yellow springs (slacked) yellow contra
Yasuni C16
stock crank/gears=wheelie machine
70 mph/12,470 rpm Trail tech vapor verified

Justinmarldizah
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Location: Hawaii

Re: Tunning 72cc gdash

Post by Justinmarldizah » Tue Feb 02, 2016 4:07 am

Contessa stock crank, i was running 6&5.

Justinmarldizah
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Joined: Wed Dec 23, 2015 3:49 am
Location: Hawaii

Re: Tunning 72cc gdash

Post by Justinmarldizah » Tue Feb 02, 2016 4:08 am

I could reach 70 with my pg i had 6&7.5 weights. I only topping out to 67 with my gdash.

Meloshameless
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Re: Tunning 72cc gdash

Post by Meloshameless » Tue Feb 02, 2016 4:23 am

Ohh.. Honestly i dont think that contessa has the power for that g dash. To much pipe for it. I bet the corsa would push it plenty. Read on my tranny set up. Ô¼ç. I use 5.5, but im light. So lighter if your heavier. Maybe 4.5's. And the yellow malossi contra is 30% stiffer than stock, the red is 35%. But not sure how that translates with your 1500 rpm contra which is prob a dif brand. Either way its needed to hold that belt down low in the band . but all else fails push that pg until you can get a corsa..
2000 Honda SR (purple swurp)
corsa
naruku
polini 21 cp 36/106 pod filter
polini vari 5.5 gram
zx trans
Polini evo2 clutch/bell yellow springs (slacked) yellow contra
Yasuni C16
stock crank/gears=wheelie machine
70 mph/12,470 rpm Trail tech vapor verified

Justinmarldizah
BMX
BMX
Posts: 31
Joined: Wed Dec 23, 2015 3:49 am
Location: Hawaii

Re: Tunning 72cc gdash

Post by Justinmarldizah » Tue Feb 02, 2016 5:18 am

By any chance porting bore would do anything?

Meloshameless
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Location: beaverton, or

Re: Tunning 72cc gdash

Post by Meloshameless » Tue Feb 02, 2016 1:07 pm

Not sure, ive personally never ported one. But heard its tricky and easy to go to much. The corsa comes factory ported, so i assume if you port contessa it should rip better, hopefully someone will chime in and confirm. Try that tranny set up i was suggesting, its all relativly cheap parts, then at least we'll know if its that or not, plus easier to pull tranny case vs. The bore off. SsS or (g9) has contra for $12, whole roller sets for $20, and clutch spring sets $20, but im sure Glens cycle or maybe qik fix. Theres also a guy in waipahu off leonui st. Has a small shop and i always seen him sooping cherry bikes, maybe he can give advice...
2000 Honda SR (purple swurp)
corsa
naruku
polini 21 cp 36/106 pod filter
polini vari 5.5 gram
zx trans
Polini evo2 clutch/bell yellow springs (slacked) yellow contra
Yasuni C16
stock crank/gears=wheelie machine
70 mph/12,470 rpm Trail tech vapor verified

veedubh20
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Location: Honolulu paradise island

Re: Tunning 72cc gdash

Post by veedubh20 » Thu Feb 04, 2016 2:58 am

there is no information about your gear ratio.

Meloshameless
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Location: beaverton, or

Re: Tunning 72cc gdash

Post by Meloshameless » Thu Feb 04, 2016 3:37 am

Hes running 7.4 gears its under 72 contessa pg long topicq
2000 Honda SR (purple swurp)
corsa
naruku
polini 21 cp 36/106 pod filter
polini vari 5.5 gram
zx trans
Polini evo2 clutch/bell yellow springs (slacked) yellow contra
Yasuni C16
stock crank/gears=wheelie machine
70 mph/12,470 rpm Trail tech vapor verified

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