Adding to this old topic to report after another year of running KA.
After two full seasons at gopro and a season of Man Cup… my observation is the KA is an awesome engine. It’s been low maintenance and has great parity.
Tips and warnings/rumours from the pits:
- If you spin it high (15k+) then replace the reeds often. Check to see if they’re sealing after each race day.
- 10-15hrs between top end rebuilds if you don’t spin it high? Absolutely.
- There have been reports of some older piston ring pins coming out and allowing the ring to spin. The results aren’t pretty.
- After 5-6 hours you’ll have a sputtering top end if you don’t put a carb rebuild kit in.
- Clean the clutch at the end of the day.