Ummmm.....Pistons still have rings that need to be seated properly. Do not hold your throttle wide open for more than a couple seconds for the first little bit. Get them hot, then let them cool. As you burn more fuel, you can increasingly stay tapped to the bar. But you cant just take it out...
I wanted to say thank you To Ken, and Bruce for building me an AMAZING engine, and improving my XP in the places is lacked.
The 860 kit they installed ran better than I could have hoped.
We also put on a Polairs Primary and a Paragon Secondary, which now makes that power go to a 3" track. And...