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S
why won't the piston move I took off the spark plug, and I see it not moving when I turn the crank and while holding down the clutch on the handlebars
U
Back to the drawing board
S
storry
hey how com the piston isint moving. i took off the spark plug to see if its
moving and its not i eaven held down the clutch still no movement
U
Say Tom,

can I get by with just the catch can to the valve cover hose? Only things I’ll change are exhaust and intake/air cleaner. Not even sure I need a larger main jet running that factory carb?
Tom from Rubicon
Tom from Rubicon
Duke,
How does your engine of choice direct valve cover gasses? Replicate it as best you can. I don't have a stock engine to refer to. Photos of the engine you settle on for your build. ON YOUR thread.

Tom
U
user58329
I can do that, just looking to have some firsthand knowledge. My engine of choice is the Ducar 212
This is posted on my thread. Is this not a good place to make inquiries?
waqassaeed
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Untame
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WoodlandsCobra
Hey I'm trying to get my motorbike up to 80mph. I installed a window port piston but it's the only thing bogging it down n making problems. 1yr of BS. I tried a HP carb, a PZ22, etc. But there's gotta be a way to increase performance of 80cc engine. I want higher HP, higher low end top end speeds, faster acceleration, better control, etc. What's everything u have to say bout that?
WoodlandsCobra
WoodlandsCobra
I think the window port piston is the root of all the problems. But it's "suppose to work". Maybe the window port is too big
tommygunn1488
tommygunn1488
do you have a reed valve?
the windowed piston will ONLY make gains if you have done a bunch of other mods too , REED VALVE,GOOD CARB I LIKE MIKUNI 19MM BOOST PORT IS A GREAT MOD ,HIGH COMPRESSION HEAD,, A GOOD EXPANSION CHABER PIPE A MZ PIPE OR ONE FROM DAVE RUST i have a snake pipe AND the newer one that he makes now ,and there are other mods as well but 80MPH is not gonna happen the best ive done is 63.8
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