05 Wr450 chain slap

[Dodjy]

My 05 has heaps of chain slap noise, especially low to mid speed. I gather from other postings that it's a common trait of the WRs but Yamaha have sort of fixed it in the 05 by sticking tape under the chain guide. I set the chain as per manual which seems to be a touch loose to me and the bike has done it from new. Anyone else have the same problem and if so have you done any mods to correct it? Besides getting a noisier exhaust that is.

[gregwr450f]

Have you done a search?

Tighten the chain another 5mm, measure from the chain slider bolt at the rear to the middle of the chain =45mm with no load.

Silicon glue some 5-6mm thick rubber under the top of the slider.

[MattyH]

gregwr450f suggestion about the rubber is a good idea, it is also a little easier to accomplish if you cut holes for the slider mount bolts as this helps anchor the rubber in position witht the adhesive

[WGP]

All you need to do is tighten it up, if you follow the manual its to loose

[Dodjy]

Thanks Guys, I thought it was a little loose. I'll try the rubber trick.

[Indy_WR450]

No need for rubber. Just place the current slider in the normal position with a 1/4" - 3/8" gap between the slider and swingarm and fill it with silicone sealant. After 24 hours of drying finish by bolting the slider in place.

[enduro10]

Take care with the subframe. Mine got some marks when the chain was into specs ! I added a piece of plastic to protect the subframe in the square aluminum tube.

[MathProf]

Chain tension is really critical.

Too tight and you will start getting loose rear sprocket bolts.

If you don't catch it quickly you will start to round the holes in the rear hub.

$$$$$$$Cha-Ching

[RB2]

Chain tension is really critical.

Too tight and you will start getting loose rear sprocket bolts.

If you don't catch it quickly you will start to round the holes in the rear hub.

$$$$$$$Cha-Ching

Not too mention your countershaft seal and possibly bending your countershaft

[timcook]

I used "ShoeGoo" under my slider. While it is similar to silicone, it dries harder and it is easier to smooth out and build-up higher to protect the swing arm.

[unkle_george]

take off the little 'hats' that hold down the slider and hit them with a socket and bend the ears down so they hold tighter. That and some silicone and you'll never hear it slap again.

- Ryan

[chipwich]

Ditto what Indy said. Takes all of about 10 minutes to do. Remove two top bolts on slider and hold away from swing arm with zip ties. Clean swing arm and slider with a little bit o contact cleaner. Put bead of silicon gasket where chain slider bolts to swing arm, let set up, then bolt down chain slider. Slap and wear problem solved, assuming your chain is adjusted properly.

[Dodjy]

Thanks for the help everyone. I'll set the chain at 45mm from the top of the slider bolt to the middle of the chain with no load and put silicone between the slider and swingarm.