Long story short 850 special (not sure if 1980 or 1981.. vin plate shows 4/80)...anyways bike sat for like 2 years.. cylinders siezed.. soaked about 2 weeks with pb blaster .. finally broke free.. changed plugs and oil.. fires right up, but at like 4000 rpms... been spraying linkage for 2 days.. getting movement but still not right and now after running for a few minutes, shuts down and won´t start for like 10 min..