Clinician
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Joined: Sept 21, 2015 13:42:32 GMT -6
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Post by rcq92130 on Sept 21, 2015 16:29:58 GMT -6
Hi Mr. Oop! So going from OEM to 18/36 would be changing from 3.08-1 to a 2-1 ratio ..... is that right? And your 16/37 is 2.31 ... right? I was not unhappy with off-the-line performance before with the small engine - I suppose because of the steep gear ratio. But I'm not looking for more there ..... hope to have better high speed hill climbing and top end. Would you recommend 16 or 18? EDIT Now I'm REALLY confused. I get there is probably a "best guess best rear ratio" for the bike, engine and me. But in scanning the available gear sets it seems there is a lot of overlap in what ratio you can achieve (eg: 14/37, 16/42 and 18/48 all result in about the same ratio). Is there an advantage with going with a smaller (or larger) counter shaft gear???
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Clinician
Currently Offline
Posts: 2
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Joined: Sept 21, 2015 13:42:32 GMT -6
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Post by rcq92130 on Sept 21, 2015 13:49:20 GMT -6
Am just about to do an engine makeover on my little retro scooter and will no doubt need to re-gear. Suggestions needed. Old engine: 150cc GY6 with a 60mm BBK, free flow top & bottom, 30mm carb, decent variator. 10" wheels, scooter is about 225 pounds and I'm 175. Takeoff was very good; top end pooped out at 60 to 65 (have a barn-door windshield). New engine: 190cc Taida "B" block, 63mm piston, +3mm stroker. Probably should have re-geared before, but will definitely need to now. Again - this is a short block with 10" wheels. Suggestions as to good gear ratio to try?
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