87 Exciter Mag Side Lean

I have an 87 exciter that is not running correctly at idle and the very low end. When i lift the fuel enrichment plunger with the engine warm on the PTO side the engine dies down as it should. When i repeat on the Mag side it speeds up. The carbs are clean and correct. I have switched the PTO/MAG carbs and the problem stays on the MAG side. Any ideas before i split the case and change the crank seals?

Good to see you black bear..sorry but its crank seal time.

Thanks Throttle Junkie. It sure acts like a leaking mag side seal. I guess i will have to rip into it. Another question for you has anyone come up with any good method of removing the drive shaft collars/set screw? Also i believe i had read that you really don't even need the idler wheels on the outside so if that is the case why even bother putting the collar back on?

Slow to update this post but the new crankshaft seals did the trick.

i just take the outer wheel off the drive shaft..... problem solved and much easier to swap tracks then