Rattle at idle

[jamesh75]

My '94 KDX 200 rattles at idle. I have read on the forums many of the things it could be from the kips valve, exhaust springs, or a rod bearing. I found this video on youtube of a KDX 220 at idle and mine sounds exactly like this. From hearing this, can anyone tell me what the problem could be?

http://www.youtube.com/watch?v=fLbN8rv0k_U&feature=related

Thanks,
James

 

[krazyinski]

The problem is that its a KDX and they all sound like that with the engine in stock form. With the stock pipe the rattle is even louder
I have had at one time two kdx 220's one 200 and one of the 220's had the cylinder plated,porting and squish band milled. the stock motors rattled at idle the performance motor sounds like a 250 two stroke at idle. dont worry just ride. know that the stock 220 piston is known for casting flaws. This why the one 220 got all the performance mods, it chunked a piston broke and the case. There is a wide inconsistency among 220 pistons some have got good service some have not. the 200 however does not suffer the same issue.

 

[rhansen]

Sounds like my new 05 KDX200 with 5 miles on the clock.

 

[jamesh75]

Thanks for the replies. I'm glad to hear that I don't have to stick a bunch of money into the motor trying to get rid of that noise, when it is normal for the KDX. Other than the noise, it runs great.

 

[rocketman1]

Sounds like mine too, I think my sounds more like a diesel than that, stuff it, just ride it till something happens, if it ever does???
Mine goes like a cut cat so I figure how can a bike go so well for so long yet still sound like the piston is loose, its still got to be good.
Ive been told not to let them idle too long , apparantly not too good for two strokes.

 

[Rotorranch]

Try running a full quart of oil in the tranny. I think there's a few threads here on the KDX forum that address that very thing.

Rotor