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Post by bucket6429 on Apr 11, 2012 16:10:33 GMT -5
i have a qmb139 motor with a free flow, 85 jet, leo vince titan exhuast, 1500 rpm clutch springs, unrestricted cdi. also wondering if i get a 50mm or 52 mm bore will i HAVE to upgrade the cvt immediatly :scoot2:
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Post by larry001964 on Apr 11, 2012 23:24:35 GMT -5
Hi bucket
Hummmm not sure your goal, if it's to do a bbk upgrade without upgrading the cvt, then I'm thinking the 83 would give you the best chance of that.. You will have to upjet to probably a 92 or 95 main jet .. I have the 52 mm but it's combined with the stroker and right now I can't find key guides that can width stand the power of the stroker crank.. I'm not sure the 85 cc would be much different, never having tried a 85cc without the stroker....
I do however know many who have done the 83 cc bbk and only had to increase main jet to a 92 or 95 and slightly heaver roller weights...
If your wanting to keep your scooter reliable and make it a daily driver it's best in my opinion to stick to a combo that's fairly well proven.. Id go with the 50 mm, upgrade the main jet to a 92 or 95... do a plug chop to make sure that's enough.. and increase the weights in your variator a gram or two.. Good Luck and keep us posted as to your progress..
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Post by Deleted on Apr 12, 2012 2:11:59 GMT -5
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Post by bucket6429 on Apr 12, 2012 19:11:09 GMT -5
thanks i will just installed my leo vine today
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