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Post by kingy2k7 on Sept 29, 2006 14:30:56 GMT
HI, I RECENTLY ORDERD SOME NEW ROLLERS FOR MY BOATIAIN E4-BT49QT-7 AT 16X13 4.00G WHEN I FITTED THESE TO MY BIKE THE ACCELERATION IMPROVED BUT IT STAYED AT 35MPH SO I DECIDED TO GET HEAVER ONES AND THIS MADE A MASSIVE EFFECT IN SPEED (NOT TO MY ADVANTAGE) THE NEW ONES I BOUGHT WERE 16X13 8.00GRAMS AND THEY MAKE THE BIKE STRUGGLE, FOR INSTANCE IT DOES 25 ON A STRAIGHT, BUT DOWN HILL IT GOES OFF THE CLOCK (55MPH ISH) I NEED SOME HELP ONTO WHICH ROLLERS TO BUY SO MY BIKES ACCELERATION IS GOOD BUT ALSO THE SPEED WILL BE GOOD ASWELL (45MPH+) PLEASE HELP, THANKS  |
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Post by Simar on Sept 29, 2006 17:00:48 GMT
I think the rule of thumb here is that the lighter the roller the quicker the acceleration, and the heavier the roller the higher your top speed would be.
So perhaps something in between 4g and 8gm, say 5g or 6g.
Perhaps somebody that has done a roller change could put some more light on this.
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Post by andyscooter on Sept 30, 2006 7:27:56 GMT
i remember davros changing rollers when he was about and he mixed his to give him a best of both worlds
may be the answer but dont think you will get 45+ may just get 40 these scoots arnt that fast
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Post by Macrofeet on Oct 4, 2006 15:10:48 GMT
Go as light as possible without loosing any speed from orginal rollers to gain accel
i went from 6.5 stock to 5.5 to 5.0
if your rollers are like 8g this is probably gonna be over weight for best preformance
when i checked my 125cc it had 12g stock rollers
most people say on qt9's 50cc engine 4.5g to 5.5g is normally best this works out with engine size cc/hp
125cc = 12g
125/2 62.5 = 6g
50cc = 4.8g
but i am not sure if they are actually related
if so it will mean "The best" roller weight will vary depending on how the bike is tuned
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