Sam,
If I recall correctly, Pewe has an APE lightened and balanced crank, but also set of Carrillo rods and an NOS set of RC 836 pistons. Sounds like some of the ideal parts for an 836 to handle 10,000 rpm.
George
I have to rev a lot whith the Ape crank with Carillos
Undercutted trans 2,3,4, HD primary chains since before, primary hub with new rubbers going in too. Head and cyl block need to be decked for true flatness, a little bit more compression.
I'll not stay at 10000 for long, just a good shifting point. I have a Megacycle cam 125-20 that is very fun from 7000- around 10 000 rpm, I had to shift. Maybe cam want more
It looked like the tacho was tuned when it ran wild so easy:) I had problem at 4000-6500, way to rich. Maybe the acc pump. Cams Action Fours SS1 and RC 295 have no problem, needed even richer pilots.
125-20 has very special exhaust data. This might work with my old smoothbore 29's without acc pump.