does any1 kno what the biggest kit u can putin a 660r i've heard of the 770cc but any1 kno of anything higher and who makes it and how much thanks burd

 

just get it bored by cycle pro. dont put all that money into it if your just crusing around. if your gonna drag, than buy the 770 kit but if money isnt an option than get it! search around on the net and youll prolly find something

 

770 is not the largest being built today.
I have spoken with one particular builder that has been building bigger and having VERY GOOD success!

And NO, it's not a SPARKS, TRinity, POWROLL, etc. etc....

 

Swy-We want details!!!!!!!!!!!![img]i/expressions/face-icon-small-happy.gif[/img]

 

who makes that? is it a whole cylinder and head, and whats the specs? how much hp gain? cc? rwhp?

 

Extreme, o3,

I'll provide a phone number for you 2 tomorrow. I don't have my tech/contact file here in front of me, sorry.

 

I was talking to jeff who has the red raptor 77 on NOS in DW. Powroll is trying to make it close to 900cc.

 

I just sent my motor in to power roll, with the bore and stoke they said it should be around 70hp. I sent the head in to get done too.. The cost is around 1700.00 for the bore and strock and 500.00 for the head work. I should be able to let you know how it work in a couple of weeks.

 

hey imca10 i would also recommend a new clutch and basket because they usually smoke the stock clutch.

 

When you say low RPM how many do you think? With the 120mm piston what would you beable to rev it to.