I raced my buddies 450r and he only beat me by about 10 feet after about 500 yards. Which is faster on top end???

 

I have seen the 450r having more top speed than the 660. I did have a 660 go past me by atleast 5mph, though. I don't know what gearing he had, but faster than what I run.

 

Dang 5mpg is alot... Wished u knew what he had because i want to make my alot faster.

 

In the modern scheme of things, displacement doesn't mean anything unless you are comparing engines of identical design. Just because 660 is a bigger number than 450, doesn't mean...........

And, that 450 has a 50 pound weight advantage over you!