Kawi2strokes.com Forum

I don't know how much the moly coat really helps. 3 new Wossners installed recently and the coating wore off relatively quickly, I'd say way before the bike was up operating temps.

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74 H2B with reeds and 34mm carbs
75 S3A Ram Air with reeds and 30mm carbs
73 S2A (wife's bike)
71 Yammi RT1B
83 HD Sportster
03 Yammi R1
06 Kaw 750 Vulcan (wife’s bike)
12 Yammi vstar 250 (wife’s bike)

It most likely stopped a hard seizure Richard. That's a good thing..............

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

It may have to some degree. There was an imprint of the piston on the cylinder once I tore it apart, which looks like moly leftovers

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74 H2B with reeds and 34mm carbs
75 S3A Ram Air with reeds and 30mm carbs
73 S2A (wife's bike)
71 Yammi RT1B
83 HD Sportster
03 Yammi R1
06 Kaw 750 Vulcan (wife’s bike)
12 Yammi vstar 250 (wife’s bike)

Maybe before you try to start it consider a vacuum test for each crankcase section to determing if the crankshaft seals will hold vacuum

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Tried firing every stroke and every other stroke, every stroke is better.

3 H2's, all stock
Seats by Tony O'Connor, they're gorgeous
H2B, converted to H2C
75 Paint & Decals by Brian H
75 Euro Seat by Tony O'Connor
Eldorado Motorcycle Seats, Australia

So, it's been awhile since I've posted about the project because it went on the back burner for a bit due to issues with some of my other bikes. Anyways, back to the Kawi project!

So I'm still tossed up on what to do for pistons and cylinder bore. Here's what I'm thinking. The cylinders look good yet with only a real small spot of rust on one of them. Rust is light enough where I'm sure it will clean up with a ball hone. Also, cylinders are still factory bore size. Factory Pistons look alright, other then the rings are stuck in them. So I guess my question is does anyone have any advice about using a ball home on these cylinders? I've used them on car engines in the past with great results. Any do's or don'ts? I would really like to keep the bore size stock size if possible but clean them up for new Pistons. I guess that's my thought process on this.

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'75 Kawasaki H2C
'75 Yamaha RD350
'75 Honda CB400F
'86 BMW R80
'94 Honda XR650 'street tracker'
'04 Honda RC51
2013 HD Heritage Softail
2013 Triumph Speed Triple R

I have a bunch of how to's up also.... Ball hone is fine (no pun intended) it's the amount of honing.

https://www.youtube.com/watch?v=xWjZ_kteDTk

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

Wossner fan am I. Ball Hone lightly.

If you're so inclined a bore gauge can be had fairly cheap but others use calipers or a dial gauge for a quick check (FWTW).

I pull the cylinders off all my 2-strokes fairly frequently (because it's easy).

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This is true. Where I grew up the hills were so steep and long, when your ball rolled down the hill you just said "screw it"...

Thanks for the responses! I'll try a fine stone first on my hone and see how they clean up and measure. If memory serves me correct, I have a few thousandths to play with before I get close to service limit. And definitely going to go with wossners for new pistons.

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'75 Kawasaki H2C
'75 Yamaha RD350
'75 Honda CB400F
'86 BMW R80
'94 Honda XR650 'street tracker'
'04 Honda RC51
2013 HD Heritage Softail
2013 Triumph Speed Triple R

The ball hone might take tenths of a thousandth out but you'd probably wear the hone out before you got .001 larger. The thing to keep in mind when honing is stock removal will be greatest at the top and bottom of the bore and around port openings. This is true even with an adjustable or expanding honing head. Don't hone any more than it takes to get your honing scratch into base metal, out of round and hour glass shape is not good.

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Tried firing every stroke and every other stroke, every stroke is better.

3 H2's, all stock
Seats by Tony O'Connor, they're gorgeous
H2B, converted to H2C
75 Paint & Decals by Brian H
75 Euro Seat by Tony O'Connor
Eldorado Motorcycle Seats, Australia

Post a few more pictures of your progress!

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72 H2, 75 H2C