Another OS140FI question
 

It turns out that I did need a new rear bearing. I found a good German bearing of exact specs, although I took the seals off of it. I was surprised that the OEM was a sealed bearing. Anyway, big difference now. All of the RPMs are back.

Here is another situation. On dissasembling the motor, when I removed the airvalve, the little plastic insulator stayed in the crankcase. I pulled it out, but I noticed that there was some sort of adhesive that originally held it to the air valve. I got a nice tight fit when replacing everything, but I had to tighten the airvalve retaining screw more than normal to keep the airvalve from turning. What kind of adhesive can I use to reglue the insulator to the airvalve stem, or do you think that as long as it does not turn I'll be OK?

Also, is it possible to get a replacement insulator without buying a whole air valve. I do not see that individual part listed a Tower, and the airvalve itself is very expensive ($375.00).


Thanks for your assistance. I know that these motors do not bring the easiest answers.


Mark

Another OS140FI question
 

Mark,

The plastic insulator comes only with the air valve body or the complete assembly. It's not available as a separate part. You'll have to contact your O.S. Max distributor for prices and availability.