407

[tp300ex]

so idk if i want to go up to a 416 but was j.w can u tell a diffrence when u instal a 407? and would it be more relibal than the 416? also i was looking at cams and there is 2 kinds hot cam and another one i forgot wat its called.....well thanks

[boricua]

a 406cc isnt much bigger than stock, 397cc. 416 is better and still reliable, from what i hear. if you went with a 406, you might want to bump up the compression a little, maybe 10.5:1. you should notice a little difference with that. as for cams, that kind of depends on the riding that you do. they can get involved and therefore require more money, maintenance, etc. do a search on hotcams or stage 1...

[400exrules]

i would go with a 416 if i was you (87mm). thats what im doin as soon as i can get the money. Im going to get a JE piston, but they only have 10.8:1 and 12:1 for a 416, so im not sure which compression i want, or if their is much of a power difference between the two

[tp300ex]

yea im goin to get the 416

[maxamillion]

I have a JE 406 10.6:1 with the stock cam and it feels like there is more torque throughout the gears compared to stock. Im sure you cant go wrong with either of the smaller bores.

[boricua]

even if you kept the original bore and just bumped compression, you would notice a difference. there is a difference from 10.8 to 12:1 both in power and cost of running, higher octane gas.