Kawi2strokes.com Forum

Wouldn't it be better if it wasn't as localized like TIG would be?

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

It's hard to say without doing it both ways and measuring the results, but pumping in huge amounts of heat like you'd have to do with a torch may be worse than a quick input of concentrated heat with an arc.

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If it surges, that's normal, upshift.

MIG set up for aluminum is the way to go. Just make sure whatever you are welding to the cases is the same make up of aluminum.

I'll have to look on Wednesday when the snow subsides, I might have a set of S1cases in the outside storage shed. Will advise after I go looking, no guarantees.

Extra transfers will help immensely, case reeds, as nice as a good rotary valve setup. I also have an S1cylinder reed valve'd engine, GEM bolt on holders, reed sets from an RD Yamaha. Ever take a close look at an S transmission? There is an open gear set area, would be nice to find a gear pair for a 6th speed, drum is simple lathe and milling machine work on a new metal tube.

in discussing this with David 9my fabrication froend some of you have met) in the last week, we've gone over a few options about how to combat the warping, this has all come up. the torch heat is not as bad IF we heat it evenly as much as possible, so it would be a 2 person gig to keep the heat dispersed across the cases, or at least that's the plan. mig is an option but the plates I would use would be pretty small and we would probably take along time to do it to keep it from getting too crazy, lord knows im in no hurry. tig would be preferred though. we just did some mods to some rd engine covers and they actually came out straighter than when we started. (fixtures...)

id weld on just enough of a flat plate to bolt the cage on, it has a 2-bolt flange and will feed through a 34~mm id hole per cyl, so its not going to be the large sheet type cages built onto the cases, but rather 3 small 0.20 thick 6061 plates roughly 1.25 'tall' and 2.5 ish wide.. look forward to your opinions on this one h2r.

In the mix of things, I would design to make sure the end of the reed cage would be out of the way of the mixture flow path up the rear transfers. Of course, we are going to keep the loop filling as efficient as possible, and that means keeping the reed just that far back as to make it the rear wall of the rear transfers, so the mix curves up the transfers without interference that alters the curved mix movement.

I still believe MIG is the best way to go, and have done my case reed conversion that way. Init, I also filled the open areas between the base gasket faces to give one full gasket surface across the base gasket area, so could weld onto the outer walls of the transfers on the cylinders, for a bit more transfer opening area. What this was actually done for was in prep to use a one piece liquid cooled all 3 into one cylinder with the transfers siamesed walled between themselves, and adding rear transfers and bridged exhaust ports. This is a very ambitious project, and has been on hold for a while, just no time to work on it. This is all on an H2 case set. Only variation I should have done is reverse the cylinder, reeds on the front of the cases, and EFI.

Your project sounds very good, I believe you are in the right track.