Radar gun on a long straight with a 600 engine in a racer yielded 105 mph. 500 racer clocked 95 mph. This was decades ago. The 500 racers will now do nearly as well as that 600, but the highest timing slip for the 500 is 100.6 mph, which set a record at ECTA. This is using 7000 as a redline. Coburn Benson used 8000 as a redline on the Flash and clocked 113.7 mph to qualify at Daytona in 1968. I have the original timing sheet, which Ben was smart enough to grab. The bike did have a faring.
On a road racing track with a flying start into the straight, I think 105 mph is the best one can do on a 500 racing Comet. I would usually select a rear sprocket that would turn 105 mph on the straight as I hit 7000 rpm on the tachometer. Assuming that gearing worked well in the other corners, I would stick with it.
I don't think the 600 street Comets go very fast as that is an rpm thing. I suspect many are all done around 80 mph, but they should have very good torque, which is what street riding is all about.
Bill's time sounds spot on. I did 98.75 mph at Bonneville, which was 6 mph above the AMA record. The bike would not rev above 6200 because one of the aluminum head nuts broke and let out the compression at the higher revs.
David
On a road racing track with a flying start into the straight, I think 105 mph is the best one can do on a 500 racing Comet. I would usually select a rear sprocket that would turn 105 mph on the straight as I hit 7000 rpm on the tachometer. Assuming that gearing worked well in the other corners, I would stick with it.
I don't think the 600 street Comets go very fast as that is an rpm thing. I suspect many are all done around 80 mph, but they should have very good torque, which is what street riding is all about.
Bill's time sounds spot on. I did 98.75 mph at Bonneville, which was 6 mph above the AMA record. The bike would not rev above 6200 because one of the aluminum head nuts broke and let out the compression at the higher revs.
David