Looking at it now I'd say yes so my next question is when harley start using the " B " counterbalanced motors in the softails ? Not sure about that one.

 

2000 was the first year for counterbalanced engines, the first twin cam engine for softails.

 

Thanks for that I have zero twin cam background. Just never did feel it for that engine design.

 

How much of a concern is there on developing a misalignment to the flywheel when you tend to hit the rev limiter repeatedly in the first three gears on a modern day twinc?
Is this a proprietary factor that includes any motor, or is it limited to v twin engines only?

 

Right!

 

Twinkie cranks where known of twisting if abused regular, huge aftermarket grew up around this. The big V twin crankshaft was never meant to be a high RPM unit, it was however designed specifically to generate a lot torque at low to moderate RPM levels. Bouncing one off the limiter all the time is an ego thing and it will bite you one day, while they can be made to do it they don't really like it.

 

I hear bent valves a lot in regards to sustained rev limiter abuse. And flywheel issues.
I do get some buzzing at the bars at rpm’s above 3800 where I spend most of my time in. Unless I’m on thickly settled environments.But I try to shift when it’s late in the power curve. And almost always hit that limiter. I don’t sit on it tho. Just graze it a hair.
You see the stunt bikes get really deep into sustained rev limiter intervals. I wonder if they get theirs welded?

 

Oh yeah the do crank work to play those games and are into the engines more than they'll admit publicly but those types it's all part of it when you play that way.

S&S has a youtube video where they twist cranks in a controlled setting with a big *** torque wrench. Even welding them stock flywheels let go not much over what a stock one did.

Even on shovels I have spun the output shaft in the wheel itself and snapped one off at the bearing in the cases. You play hard enough sooner of later you pay for it with a HD V twin. RIde um like an old tractor they'll last forever.

 

Here's one of those videos.

 

Bent valves come from valve float. As RPM increases and is sustained the lifters can actually pump up more than at lower RPM's which put the valves closer to the piston at TDC. With enough moons aligned (valve lift, piston dome, decked head,etc...), they'll take a hit. One main reason the non-lifter type valvetrain systems don't succumb to pistons hitting valves as much.

IMO, it's not so much the high RPM that scissors cranks, it's the fast changes in RPM that do it. Like during burnouts. You dump the clutch and go from idle to redline in a fraction of a second. That puts a lot of stress on the left flywheel compared to the right one.

There's a video out there of a guy with a HUGE breaker bar doing stress tests on S&S cranks that shows welded cranks aren't what they're made out to me. Lemme see if I can find it.