This group is dedicated to the discussion of the technical aspects of racing vintage Honda CB/CL 160, 175 and 200cc motorcycles. Mechanical info, race dates, race venues, race clubs and the racers themselves.
Yep...if you go smaller on one sprocket you need to go smaller on the other to keep the ratio close to the same. And vice-versa with larger, go the same way on
John, it'll go up to around 9k or so in 5th just won't stay there or like cruising there once on the move. So I'd need to drop in the rear to get closer to
Would be interesting to see what you could do with stock pistons and compression. I've spent about $4000 in piston R&D to come up with about 10:1+ oversize
I think you might have some other issues. The engine should pull close to red line in 5th gear...at least 9,000 rpm. Should do it even easier with a 15 tooth
My 1969 CD175 has low cranking compression (75-80 psig) before and after a valve job and new rings. During the leak down test indicated only 2-4 percent loss