[Foothill35]

I have a 99 yz400 plated, just switched to sm tires.
Its seems to have a lot of up and down chain slap, does that seem normal, im running an o-ring chain, and its adjusted to spec.
any sugestions, mabe a non oring chain?

Thanks in advance for any help

 

[Dirtyd851]

up and down isn't gonna hurt much unless your chain is skipping teeth. are you running a chain block, not sure if your bike came with one or if it was taken off? did you set slack with rider on the bike? a non-o ring chain wouldn't help with up and down slap but it would be thinner and prevent clearance issues.

 

[Foothill35]

D thanks for the reply,
yes it has the stock chain block, and i set the slack while on a stand,with no weight on the rear tire,as per the maual.

 

[greenpea]

sit on the bike and see how loose it is
sounds like its to much slack