Ever since I had the A65 balanced @ 4500 rpm it has become SOP on every engine rebuild
BEst $ 200 any one can spend
Now I would not pull a good engine down to get it done but if the crank has to come out then it is a trip to the heat treatters for a carbo nitride then another to the balancer
I killed the A65 by pretending it was an A 10 , gearing it up to get better fuel economy and a longer range.
SO the new build was balanced at 4500 so it is uncomfortable to ride under 3500 and really nice from there to 6000 which has me in license loosing land.
When I eventually get around to fitting Ians nice new big bore pistons I am looking to do a dynamic at around 3000 rpm.
In reality I should build it get it dynoed then balance to just above peak torque but on most long stroke side valves that is somewhere from 2500 to 3500
