I've recently bought a new raga 300 and have noticed a pinking sound, and I find it difficult to start when warm. I'm running the bike at 50:1 mixture, with normal unleaded.

Any advice would be gratefully appreciated,

cheers Mike.

I run a 60 pilot jet in mine with no pinking, started with a 52.

Give it more Octane and less oil.

80:1 with a good synthetic is more than enough - we use 100:1 w/o any issues for trials course work (no extended road work) Dont know about your gas - but we run race gas over here at 100+ octane.