400ex hi comp. pistons

[shook]

Its the first 4 stroke I have ever worked on is there supposed to be a needle bearing on the rod at the piston end or is it not like a two stroke (250R) and more like a car motor just the wrist pin pressed in there like a car. Just asking havent pulled the stock one out yet I know that will tell me just wondering. Thanks for the reply.

Needle bearing--- BTW: I found it is alot easier to install the wrist pin after putting it in the freezer for a few hours! Oh Yea-- always use new circlips on the piston! :D