Kawi2strokes.com Forum

I know the transfer ports will be a challenge but I've got a plan and i'm a fairly good alloy welder if you use reeds they give more options for ports as most of you know directional flow is critical after that a good set of chambers helps witch i'm fairly handy at. As far as revving goes i took the old motor to ten and over easy enough but i spent a lot of time on each piston . I'm talking days .kwacka karl....

Good luck with this.
It sounds very interesting, and that you have both the design and fabrication skills to make this work.
If you get a minute, a dedicated thread with pictures would be greatly appreciated although it can be pain and time suck to document the details.

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There are only two types of motor sport racing:
Nitro and everything else
(Sometimes referred to as fast and slow)

Well it looks like my crank could be the biggest stroke crank for a h2 in the world not to shabby aye. kwacka karl

Do you wear a labcoat and an Einstein hairstyle when you work on it? That's Mad Scientist Stuff! Can't wait!

5500 fpm? Make sure you have your video camera going........

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

When theres a crank that big involved, moving at those speeds, isn't there usually a video camera going…..

Will you be making/using custom rods as well?

12k out of a 1000cc triple would sound amazing.

It will sound good for a minute. .........

From cylinder top to upper edge of inlet port it's just 66mm - so are you going to insert a longer sleeve?

Overall the given cylinder design in terms of port location doesn't encourage these kind of plans.

70mm stroke is a common thing for 250 MX bikes - but I can't see any value in rev'ing up to 12K - but you'll know.