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JEC249 · 07-01-2020, 01:45 AM

I purchased a tbr7. Im mostly riding on road so i need more top end. ive got mikuni knockoff with 115 main, open cone shaped filter, ebay special exhaust, and i ported the intake, ported and polished exhaust. Ive noticed most people run a 17 tooth front sprocket with a 42 tooth rear sprocket for on road use. Well my dilemma is Amazon is fresh out of 42 tooth sprockets. I was wondering if going down to a 16 tooth front sprocket and down to a 40 tooth rear would be suffice? I know that the ratio for 17/42 turns out to be 2.47and some change to 1 and a 16/40 comes out 2.5 to 1 ratio. Would that 0.03 make much of a difference?

07-01-2020, 01:45 AM	#1
JEC249 Join Date: Jun 2020 Location: Calhoun City, MS Posts: 8	tbr7 sprocket ratios?? I purchased a tbr7. Im mostly riding on road so i need more top end. ive got mikuni knockoff with 115 main, open cone shaped filter, ebay special exhaust, and i ported the intake, ported and polished exhaust. Ive noticed most people run a 17 tooth front sprocket with a 42 tooth rear sprocket for on road use. Well my dilemma is Amazon is fresh out of 42 tooth sprockets. I was wondering if going down to a 16 tooth front sprocket and down to a 40 tooth rear would be suffice? I know that the ratio for 17/42 turns out to be 2.47and some change to 1 and a 16/40 comes out 2.5 to 1 ratio. Would that 0.03 make much of a difference?
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