Man, iv been relentless asking questions lately. But I’m not real familiar with the trx450. This is my first time owning one. It has a Athena 500 big bore. Do I need to run aftermarket valves and valve springs for a stage 2 hot cam
My exhaust valve stem measurements are barely in spec, but not at the service limit. I was wondering if I should replace them or just run them for another season.
Exhaust valve stem spec: mm(in)
Service limit: 4.96
Left exhaust: 4.966