Quote Originally Posted by DanDaMan View Post
man u seriously spamming bars thread , because I can . or claim, to be able to go 13-15 mph faster than u ?

as for power to money , best buy would be a turbo , to add nuther 2-4hp , as decking/compression ect prob add 1 or 2 for a lot more time and $$ , and those numbers might all be "to hopeful"

and the motor is nearly "square" allowing a lot more power thru out the powerband , which allows a bit more pull at lower rpms , so stretching gears made sence to me
I for sure am not a mech, but I've always believed that there is a pretty much standard powerband for all 4 stroke OHV engines that can be played with by cam grinds and carb tweaks. I thought it was somewhere in the 4.8 to 5.5K range. I just got around to installing a tach on my bike and now have numbers that go with my rider feel. She seems to have plenty of torque from roll on (idle is 1800) to about 5K. Anything much above that is more noise than anything else. I'm not a speed at any cost person so I've always ridden where she feels right. On my ride, regardless of gear, that seems to be in the 5 to 5.5K range. It would be good to hear from other riders with tachs to see what their "butt dyno" tells them about the powerband.

It is my understanding that gearing is only to keep the motor in it's powerband so, you can gear for work as in a tractor, or speed as in a car. My father drove 18 wheelers and I remember that it required up to 18 gears so stay in the narrow powerband of the early diesel motors. I'm thinking that torque gets you there, but horsepower keeps you there? Anyway, has anyone seen actual dyno runs on this motor to verify powerband?