Quote:
Originally Posted by Washburn
What's the best way to get the inside of it cleaned out then? I planned on going to the very core of the engine and rebuilding ground up to clean every part but if it doesn't require me to split it open I'd like to get it as clean as I can.
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Insides are sealed if engine was in one-piece and not disassembled when you got it. You can drain oil and send in sample to one of those used-oil analysis places. From metal contents, they can tell if there's unusual wear that requires replacing rings or bearings.
Most of time, running through one sacrificial oil-change for 100km should be all that's needed to clean up inside. Then replace with full-synthetic JASO MA oil.
Of course, not knowing exact condition of engine can be unnerving. Did PO ever have bike running and can verify engine engine didn't make any unusual noises? You can run '88 Ninja engine to see how it sounds. If good, you can put it in ZZR while you take your time with ZZR's engine.