I have a clean and complete 1980 Batavus Starflite with approximately 2,500 miles on the working odometer. It had sat for around 30 years.
The engine ran and idled well for approximately 3 weeks. Currently it starts well, then runs away as if being throttled to WOT.
I looked for air leaks on the cylinder, intake, and exhaust mount. I have not found one so far.
Attempted a reed valve swap to the MLM alum CNC'd carbon from Treats. It would be tough to start, then die under any throttle (without load). I swapped back to the stock reed valve, and the original run away WOT occurred.
Could this be a crankcase seal? Or should the focus return to the intake?
Thank you very much!