esr480 question

[rodenberg35]

I just orderd an esr 480 kit and I was wounder how much difference I can expect over the stock bore. I was running a je 12:1. any info would be great

mods if it helps

hcs 2
mild port
stock carb (185)
sparks pipe

[mikes450r]

what did you pay for you 480 kit...if you dont mind me asking..

[kwatts400]

When I was in MI last weekend, I raced a guy w/ an esr 480 kit on his 450r. It wasn't even close. I would say he had me by 5-6 bike lengths (my mods are in sig). I'd get an extended swingarm with it.