Rather than open up another thread, i'll put this in here ....
I've got to get a roll bar mount for the go pro, my roof gets in the way a bit.
http://youtu.be/wx8ofQ3mleM
Ran with a 4.67 final gear. Choice was OK for this race, but grabbing second on any of the mild to moderate uphills resulted in some bogging down and slippage.
Had the fan on the entire race. It definitely improved the "backside comfort" level and i'm sure it helped the engine with not only cooling , but airflow to the air filter/intake area. It drops the revs by about 50 rpm when on.
carb jetting still needs some work. the jets i ordered weren't big enough and my twist drill selection has a gap in sizes right where i needed one. After drilling a couple out to went from bogging condition to not getting any tan on the plug. It's also difficult to plug test this engine since there's no manual neutral and cutting off at full load in one of the higher gears results in no-fired fuel "overun" into the chamber.