5-7HEAVEN
Well-Known Member
This goes to show that raising the gear ratio is wrong for you.
Finally got out of the neighborhood with Predator 212cc stock on Meridian trike.
Not even that...The chart is totally bogus if that is the expected MPH on my China Girl...Pure Bunk...lol...118.173 MPH???...lol...DAMIEN
5-7HEAVEN
Well-Known Member
Not pure bunk, but entirely scientifically and mathematically accurate!
The reason that you have bogus results is that you’re so far off from what you really need!
If you were gearing for the Bonneville Flats, then 4.2:1 MIGHT be close to what you’d need.
If you were going off-road with a 212cc-powered bike, 20:1 low gears MIGHT be needed.
On a light bike and flat roads, 6:1 ratio might work.
BTW, does your engine still have its governor?
It’d make a difference on how low your gearing would be.
If
Really???...Its totally inaccurate...My CG is never going to go at 118 MPH
And another one...how the hell would i know if there is a governor even on there...I specialise on keeping things stock, as they come out of the box as most folks will ever use them...If there is a governor on this Zeda 80, i would not know...i wouldnt even know where to find it and disable it...DO YOU KNOW WHERE IT IS and how to disable it???...But if there is, im glad it is...118 MPH on friggin bicycle...you have got to be kidding me...That chart is totally bogus...Prove to me otherwise...DAMIEN
5-7HEAVEN
Well-Known Member
Try not to think of the gearing of CG/2-stroke high reviving engines to be similar to a 212cc trike.
Ya can’t compare a 9000rpm CG to a 3600 rpm 212cc 4-stroke engine.
Using 16:1 CG gears for a 212cc would probably work to 15mph on a trike.
Using 4.2:1 gears on a bike with CG engine, the bike wouldn’t move an inch and the clutch would self-destruct in a few minutes.
5-7HEAVEN
Well-Known Member
I’m questioning if the OP has a governor in his 212cc engine.
5-7HEAVEN
Well-Known Member
Damien, do more research on the gear ratios needed for CG -powered bicycles.
Then you’ll realize how the gear ratio charts work.
Chainlube
Well-Known Member
First of all that's not the true ratio of a CG engine, you have a gear on the output shaft running another gear on the clutch, then to the output gear to the wheel. Plus you need some torque to get up to speed. Lots of CG engines run in the 8000-9000 rpm range, which give you pretty close to three times your prediction.
You have not answered any one of my questions...on my previous posts...YOU are totally in error...DAMIEN
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