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What to expect?
http://www.kawi2strokes.com/forum/viewtopic.php?f=16&t=14110
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Author:  Jim [ Sat Aug 15, 2020 12:50 pm ]
Post subject:  Re: What to expect?

Goodwrench wrote:
Jim wrote:
Have you measured the big end connecting rod radial bearing play? My crankshaft would have needed rebuilding for that reason alone, and its seals were shot on top of that.


Haven't got that far into it yet Jim.

It's not hard to do if you have the cylinder off and the piston removed. You just have to set up a dial indicator on the end of the rod while you pull it up and down, with its side play centered. I did mine a few years ago so I don't remember what I did to hold the indicator, but I'm sure it was just come clamps and maybe a scrap of aluminum. It was right at the max spec, so I rode it 4 or 5 more years and then promptly got it rebuilt when a snap ring in the transmission failed. :lol:

Author:  H2RTuner [ Sat Aug 15, 2020 2:24 pm ]
Post subject:  Re: What to expect?

All stock seals are both labyrinth style, and rubber. Earliest H1 used a center seal that required crankcase pressure to hold the seal lips to their races, later models were constant positive spring pressure against their races. Consider that center seals have to work opposite directions as they operate, and use both side lip,sets to seal crank case pairs.

No matter the rubber seal type, to check both ends of the center seals, all 3 cylinders must be both vacuum, and pressure tested as a single unit.

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