I'm going to tear down my GX5R in search of air leaks. The tune was all over the place last night, wouldn't idle for anything until it was too rich with an idle gap too large, then would run lean and hot on the track. I know it sounds like the average woman tune, but when I leaned out the bottom and tried to close the gap it died very quickly on the stand. It has been a great motor so I'm sure I have a leak somewhere. Maybe 6.5-7gallons.


So.... I'll start by checking fuel and pressure lines, tank, O-rings in the hsn, lsn, idle screw, pinch screw, carb throat, boot, and the front bearing.

For the Go veterans, are there specific Orings or spots that are the most common where I should give extra scrutiny? Are they the same bearings for GX5R and GXII5RHO?