What does a 450r rebuild cost?

[MagicJames]

I'm partial to Honda.
What is the advantage of running steel valves? Everywhere listed is Titanium valves?
... I hate trying to buy something I know absolutely nothing about

[oldskool83]

steal are heavyer and last longer, reason you find old yamahs running with them with no head problems, new bikes get head problems and normaly a valve kisses the pisted and ends up well you know.

ive see 5 newer engines exploded appart like this.

[300rman]

the Ti valves stretch out and break off, and the head of the valve falls into the cylinder. they create more power, but they dont last long.

i wouldnt go anything older than 06, by then the oiling issues have been sorted out for the most part. the 09 CRF450 is junk, stay away.

[MTS]

The 07 kx450 is a solid bike, beat the bejeuses out of one for a season, no problems, other than Bent subframes, suckers have some Go'

[MagicJames]

I've heard good and bad about the 09's, I'll stay away until everyone figures out what the hell is going on.

There is a 07 for sale about 10 minutes from my aunt for $2500 and he will deal for cash. His dad is selling it for his son in college, and i'm thinking i might be able to run away with it for less than 2k

[300rman]

the only bas thing ive heard about the "10 KFX450 is it saws through chain sliders.

simple fix, one tooth UP in the front, 3 down in the rear to maintain same gear ratio, but to take the stress of the slider.