Please do. I know if I would have gone with a 18/38 combo I would be down to about a 2:11:1 ratio, however this would really make starting in first gear a issue I think.....
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I had a 19 on the front of mine, and IIRC it was the same 2.11 ratio with the 42 rear. Starting in first gear wasn't an 'issue' per se, but it required either clutch modulation (no fear, we have wet clutches) or just being ready to go. But then again this is Florida. Stopping at some stop light or stop sign while facing up a serious hill, like those intersections in Pennsylvania, would have me not using 2.11 final ratios.
But I was fine with it, the five people I let test-ride my bike got used to it right away, and the guy I sold it to and basically re-taught how to ride a bike is doing fine with it even as a quasi-beginner. Again, though, this is really flat down here.
I ordered mine from jawzy's which is local too me. I wanted to do a 18/38 but he explained that it is hard to fit the larger 18 front so I just went with the 17/38, overall I love it!
Thank for all the math!
I had very little trouble putting a 19 tooth on. For the 19 I laid the chain on the sprocket, then slid the front sprocket on.
When the chain was tensioned up, the chain did not hit that block at all. The rubber block is the closest thing to the chain, so there is plenty of room.
For highway gears - IMHO go big, or go home. Going smaller in the rear brings the chain to a place that some have had chain-slap issues
in the past on 800's, and it's just installing a smaller sprocket system that will incur more wear over the same amount of miles than a larger front and rear sprocket will. Who wants either of those issues?!