View Single Post
Old 01-12-2012, 06:55 PM
PerryP180 PerryP180 is offline
Motorized Bicycle Senior Member
Join Date: Jun 2011
Location: Atlanta, GA
Posts: 79
Default Re: Help with bearings

I was so frustrated I forgot to mention the important stuff. It's a Grubee 66 cc. The posts I read kept referring to the "upper conrad" bearings having a high failure rate. My engine made it to 1600 miles and died. At around 1300 miles I started hearing a rattling or clicking sound. It was not piston slap. The noise gradually got worse and really bad moments before it died. It died while it was under throttle and it just totally died. I've since replaced the motor and the new one works great. This shows me that the problem is somewhere in the motor as that is the only thing replaced. These symptoms were just as described in the post about the bearing failure. The motor will still turn over but not start or even try. Do you have any other suggestions? In your opinion are the stock bearings high failure points?
Reply With Quote