I may be old fashioned,goin' from a shovel to a tc,but i use a dtt,and i never rev my motor past 5k As soon as the tax refund comes in ,i'll do a mild 95'',and after a good dyno tune,i'll set my limiter back to 5200.
I do not see why the engine would not handle 6200......its designed for that. Just guessing but I think the bike is going to be a poor performer with such a big carb and stock heads that there is going to be very little danger in hitting the rev limiter and doing damage. I would think the intake velocity is going to really suffer. But hey its his bike and thats part of the fun of owning one.....you get to do what ever you want to with it.