Originally posted by: baumgata
My son has a 2004 Yamato 150cc. The bumper sits too low and catches on the trails. The first time he rode, he got the wind knocked out of him when he went over a rut. The second, the bumper caught another rut and he flipped his four wheeler. Luckily, he didn't break anything. Do you know if Yamato has a site to report this poor design?

Also, when you got your Yamato, did the front wheels turn in? My son's front wheels don't sit straight. I'm not sure if there's a special way to put on the tires or whether this is another poor design from Yamato? Any help would be greatly appreciated.

Originally posted by: mywifesquad
I looked at my wifes yamoto and there is a bolt on the end of the shaft that holds the sprocket in place. I would guess that you should tighten that bolt.

Originally posted by: decdug

Thanks for the info mywifesquad. I took off the bolt, and the sprocket, the problem from what I can see is that the sprocket fits over as splined shaft on to the gear box, but the end of the sprocket is not snug on the shaft, so that even with everything real tight the sproket is inclined to jiggle on the shaft. Maybe this is the same on all the quads.... But I have had a problem with the chain coming off, and I thought this was the problem. Even with the chain adjusted to the last it is still very loose, I'll have to remove a link or 2 from the chain.

Any thoughts would be welcome.