mung

The 300 is a great motor for big people and/or high altitude.My skill level is about even with a TY 80 but being 250 pounds and riding from 5000 to 10000 feet I cannot imagine a better motor.

Just an idea-Utah trials club is having a meet on 4-20 just north of SLC.You could come over for something different.

I would agree with the get off the choke as soon as possible on a four stroke but would disagree on a two stroke.The choke lets in additional fuel to make it easier to start but in doing that it also allows more oil into the motor as it is part of the mix.A good percentage of a motors wear comes at cold start up.To have more oil at this critical time could not hurt.At 40 degrees [F] the motor sure seems to run smoother,quicker if I use the choke for 20 seconds then hold idle up with the throttle.So without the choke, really you are forcing a motor to run lean,which does not help a motor that has very tight piston and ring clearance. Of course I could be all wet.

Maybe start by getting the jetting specs from a modern 250 and using that as a starting point.

Have used 128-1 ratio as recommended in my 95 350 gasser since new. Still on the original top end.Since it has not "f"d up my motor it must be something.

Rode 95 350 GG from new,04 Raga from new and as of last Thursday a 12 300 Raga.Have not rode trials in a bit but ride challenging trails.I think next year I am going to get back into the events and see what I can do in the old farts class.