rebuild

[timo_d135]

its time for a rebuild on the wheeler was thinking about

10:1 wiseco piston (note sure on the bore)
stage 2 hot cam
port & polish

and was thinking about replacing the cam chain and the tensioner

i keep seeing people talk about the crf450 cam chain. whats the big deal with it??

what you guys think

[dxcody]

CRF 450 TIMING CHAIN IS THE SAME AS THE 400EX CHAIN BUT HEAVY DUTY AND WILL NOT STREATCH AS EASY.

THE STOCK 400 CHAINS WILL STREATCH 90% OF THE TIME, THE FIRST TIME YOU TAKE THE TOP END APART.

GO 416 IF YOUR GONNA BORE, BUT WHY GO 10:1? JUST WONDERING. BUT YOU WONT SEE THAT MUCH OF A DIFFERENCE WITH A 10:1.. I MEAN YOU WILL BUT FOR THE SAME PRICE YOU COULD GET

(AND I AM ASSUMING YOU MEANT A 10.8:1 BTW
BUT!!! I WOULD GO WITH A 11:1)

11:1 STAGE 2 HOTCAM 416 BORE PORT AND POLISH SPARKS TIMING KEY
AND IT WILL FEEL LIKE A WHOLE NEW QUAD.

YOU FOR SURE HAVE TO REPLACE THE TIMING CHAIN AND TENSIONER THOUGH.

YOU COULD GET A 12:1 BUT I HAVENT HEARD MUCH ABOUT THEM SO I DONT KNOW IF THEY ARE GOOD OR BAD

[01boneless]

11:1 STAGE 2 HOTCAM 416 BORE PORT AND POLISH SPARKS TIMING KEY
AND IT WILL FEEL LIKE A WHOLE NEW QUAD.

[/B][/QUOTE]


you cant run a sparks key with a 11:1 unless use run 100+ octane gas and even then its not recomended.

[chronicsmoke]

^X2

You'd be fine with just an 11:1 piston and cam shaft. I would reccomend changing the timing chain though, it's only 50 bucks.

P&P for better flow, couple holes in the air box, and throw the right jet in and you'll have pretty solid engine without sacrificing power/reliability.

My 426 has been on the same piston for 5-6 years now! You can't kill these bikes!

[timo_d135]

i have a sparks key in it. thats why in not going 11:1

how is it 10.8:1 comp.

what year crf 450?

[dxcody]

2002 from what ive heard 2002-2006 are the same on the timing chians

and sorry i just hadnt ever heard of the 10:1
but the 10.8:1 is like JE i think. I missed that you put wiesco in ur post.

[timo_d135]

ok sweet thanks all. will tell you how it ends up

[kickindirt57f]

i bought a wiseco 10:1 and a stage 2 hotcam and im very happy with it