best big bore kit for the 450r?

[mikes450r]

im looking into getting one of the big bore kits for my 450....probably looking to go up to a 500 to a 520...out of all the companies that are doing them right now....which one would you guys suggest getting......thanks

[brif]

The max power 480 is available, although i haven't heard of anyone on here having one. The FST 500 is available and some here have the kit already. I don't think the nmotion 520 is available to the public yet. So if TODAY you want to get a big-bore between 500-520 cc's, easy FST 500 kit.

[BIGBLOCKBILL]

I don't know which is the "best" ,but my FST 500 kit runs extremely well:D

[kazpr]

Bill any idea what kinda HP you are getting out of that kit? Thanks

[BIGBLOCKBILL]

I don't really know,but an educated guess would be in the mid forties to the ground.It made the power band alot smoother also.

[400MXer]

NMotions is available and they rip. I've seen a few and they have BALLS.

[kazpr]

Nmotion tells me the big bore kit they offer are in the 50's for hp rear wheel ratings. I am seriously considering this setup after I get my suspension from GT thunder redone.

[#1speedbump]

When did NMotion release any of their kits? Last week they said they were still waiting for parts on the 520 and the 570 was a ways off.

[kazpr]

Ya he told me the 520's were about 1 week away for retail sale. Said they have dyno #'s from testing. No idea on the 570.

[dunebuggie66]

duncan has a 470, and they are working on a 505 now. i like duncan, they do an excellent job. and they do their homework so you know it will be good. it 's a little pricey but i think in the long run you won't have any problems with it. i will be getting on e when they are finished testing. a 505 that is.

[bertfull]

Where did you get the FST 500 Kit? Is there a web-site? Did you have to shave your cases, or is it a bolt on kit?

Thanks, Bert99

[#1speedbump]

call fst, no website. It is a bolt on cylinder

[bertfull]

What is FST's #? Where are they located?