Brakes, fork seals, sprocket/chain, ratios, top speed, and other worldly advice

[tophyr]

holy cow...that 140/80 is gonna fall in like no one's business...

Actually the 140/80 will be shorter (and more stable) than my current tire, 130/90, though barely so. 140/80 is 112mm tall, 130/90 is 117mm tall.

Is there any difference between changing the front sprocket vs rear? Just preference? I'm thinking of going 16/44, but 14/39 would be almost identical.

[Cal Amari]

Do NOT install a 14-tooth front sprocket; a sprocket that small will put a lot of stress on the chain as it makes such a tight loop around the sprocket. There are probably members here who will tell you they've installed 14T front sprockets without a problem, but if you have any mechanical affinity for your motorcycle, don't go smaller than a 15T up front. Then, install a suitable rear sprocket that gives you the final drive ratio you seek.

45 / 16 = 2.81

44 / 16 = 2.75

43 / 16 = 2.6875

42 / 15 = 2.8

41 / 15 = 2.73