gearing

I am looking into what rear tire to get next, and wonder if 120/90 is actually a better choice than 120/80, as it raises gearing between 3 and 4 percent, or slightly more than 1 tooth less on the rear sprocket. Is there any disadvantage to a 120/90 vs 120/80 that I am unaware of? I already have...

Ok, so I’m working out the details on some sprocket gearing to potentially run a jackshaft with a wide tire build. On my current bike, I have a 17 tooth front sprocket and a 31 tooth rear overdrive sprocket. The gearing ratio of that combination is 1.82. I would like the bike I’m building to...

Hey guys well its time to start thinking about sprockets and chains as Ive just about buttoned the engine all up. Im looking for something that'll run at 70-75mph and higher freeway speeds but something thats not crazy high in the rpms. i was thinking of getting the 31tooth rear to go with...

I am struggling with a damaged 5th gear from a 1976 XS650C (a gear-dog snapped off). I have three 5th gear cogs which are all machined slightly differently. None of the gears have part numbers written on them. I know about the MikesXS 5th overdrive and its associated problems on the forum, so I...

Well the title says most of it. I was curious as to what my options were for running a 33t sprocket on a cb750 18 rear drum wheel. I have a 17t front sprocket and looking for a 33 for my rear wheel but can't find anything that seems like it'll work. I'm pretty sure its the cb750 k7 wheel, it...