started the jetting process

My son came over tonight and I had fresh 20-1 castor mix ready from last week.
I looked at the tech specs for the '84/250wr, a starting point. The bike was 45pilot, 440 main. So I he installed what was in it. He put the needle in the third slot. The tech specs call for a 450 main and the needle in the 4th slot. But she sounded great. It's a tad off but it's a starting point. The tech specs was 1 1/2 turn on the balance screw. I preset it.
It's close enough to run it. This engine had a 10-1 mix from the PO. the engine sounds great she rips. My son rode it.

I purchased a handheld tach to adjust the balance. I have trouble hearing too. We put in boyzeen reeds but haven't installed a UFO yet.(next)