Kawi2strokes.com Forum

The denco stage one is 29.5mm, so you should be ok, it "might" be a little doggie on the bottom.

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

Oooops, Hello Mr. Learning Curve again! Before long, I'll be familiar enough with him to call him Learn for short. I measured the height of the port itself, not the distance down from the top of the cylinder to the top of the port. Am I understanding that correctly? I should be able to snick into the garage long enough to measure that and let you know. Thanks again for educating me!

I measured from the top of the cylinder to the top of the exhaust port and got 26mm It looks like I am in the market for a set of mostly stock cylinders, since I want this as a streetable bike - what is a reasonable price? Thanks in advance for any input.

Yep, major porting mistake......

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

Do I need to measure the piston too, if I am at it, in case they have been hacked on too?

Thanks, Phil

Both skirts should be the same length......

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

I might be able to hook him up. I hate to see an S3 sitting. Check your PM Phil.

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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)

A big thank you to Richard on hooking me up on the stock cylinders.

Mark came over yesterday and we think that the piston skirt had been cut, but in a lathe, all the way around instead of the typical grind only the port area. The skirt has sharp corners at the transfer ports and there is a rabbet or relief turned into the inside of the skirt.





So, we measured from the bottom ring to the bottom of the skirt and got 49mm. Now I just have to see how that compare to a stock piston.

The stock piston measures 58mm from the edge of the dome to the bottom of the skirt.

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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)

Phil, I measured a stock piston at 49mm from bottom of skirt to bottom of bottom ring so it appears that your pistons have not been modified. Also that "step" is there on all the stock 400 pistons I have.

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We don't need no stinkin' Cams!