When I received the bearing it was missing 2 needle bearings. RM was great about lt and immediately got another one in the mail. Check all your parts before installing. Nice to know RM stands behind there products. Gave 4 stars because I do not have a lot of hours on the bearing.
I've been using Pro X Pistons and wrist pin bearings in my sons KTM's for the past four years. They fit perfectly making replacement easy. I feel they are very durable and due to our racing schedule I depend on them. I highly recommend these products to anyone who is serious about motorcycles. It's also hard to beat the price. Thank you Rocky Mountain and Pro X for your support in the sport we love.
I'm not sure why anyone would take apart their top end and replace just the piston when this bearing is like $10... Just increase the price of the piston kit and include it in there, please! Aside from that, this is a high quality piece that I've used on several bikes.
Dont be cheap and second guess it. If your going to rebuild your top end spend acouple extra bucks and buy new wrist pin bearing(s) as well. Takes about 2 seconds to install and well worth it in the long run.
Machine this part was bought for: 1989 YAMAHA BANSHEE 350