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Well guys I decided to start a thread in the cruiser's forum for this very topic since we've got 2 or 3 threads around this site talking about the same thing. So now with the topic. As I mention earlier I had a tach on my 800 so I decided to get some hard number's for everyone so were no guessing . First I went out at lunch an changed the 18 tooth back to the original 17 tooth an I'll start from there. 17/42 ratio I've got 3750 rpm @ 65 mph., 4250 rpm @75 mph.,[email protected] 85 mph. Now with the 18/42 I've got 3500 rpm @ 65 mph.,4000 rpm @ 75 mph., an 4500 rpm @ 85mph. So that tell's us the 18 tooth front sprocket drop's the rpm's 250 well worth it. when I change out the rear to a 40 tooth I'll add those number's to this thread. By the way< Here's a couple of other number's we can talk about . The rev limiter kick's in about 8200 rpm. from the factory. So I hit the rev. limiter at 72 mph. in 2nd gear with the 17/42 ratio. With the 18/42 I hit the rev.limiter at 80 mph in 2nd gear. The rev. limiter is our friend<BG>