"Factory" road tests indicated them hitting the ton. Every "independent" road indicated a top speed of 94mph. And my bike doesn't have a 21 tooth, it has an 18 tooth front, which is why I want to put a 21 tooth on it. Constellations came with a 20 tooth, the Super Meteors only came with a 18.Scottie J
With a 20 you might lose lower end. Most likely would give you a great top end. As Ace says a 19 might be safer for all around performance. ERC
I realize that small change in sprockets can have a significant difference, but I'm telling you this bike is way under geared. I can get up to 75mph in about 8 seconds and then it takes about 3/4 of a mile to go from 75-90. The motor pulls pretty damn hard all the way to that 75mph mark and then just starts losing steam. And I should be putting out a bit more power than a stock 700cc twin as well, being the cylinders are punched +.040 and I have EI installed. And if you look at the gear chart, you can see right now (18TF/46TR) that I'm damn near redlined at 90mph in 4th gear. Only jumping to a 19TF will redline me below the ton, 6123 RPMs @ 100mph when the bike is barely good for 6K in current form. I'm not too worried about sacrificing a little low end power, as when I'm playing in the dirt I'm usually creeping in 1st or 2nd gear anyways and the 20TF will give me a little more leeway for 1st gear fun. If I'm on the street, chances are I'm cranking on it anyways. I guess I'll go with a 20TF as it is good for just over The Ton and should still ease up my highway speeds. This whole cruising at 4500 RPMs at 65 mph is no good.Scottie J
I believe all the old twins came with 46 teeth. ERC
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