The TYGA 300 pistons have a cut skirt. Now I know the crankcase can be attacked with a dremel and full skirts can be run.
What about cutting both skirts to even the mass distribution up and balance things better? Anybody recommend this? Would shead some weight in the process, however that is not my motivation for asking. _________________ MC21 Honda NSR250. TYGA 300 conversion.
I wouldn't reduce the length of the skirt just to even it up. Reducing the skirt on one side is bad practice in my eyes but I see why they had to do it.
The part of the skirt you are reducing is also the most important part being where the piston is at its largest. I have personally had one skirt fail on a 300 kit and I know of another where two failed.
If you want to stick with a 300 I would modify the crank cases to allow for a full proper skirt. _________________ If I have to take the carbs off once more...
I think the cast pistons have a bad history , perhaps the machining process causes fractures in the piston leading to a possible failure - along the lines of a dropped piston is a damaged piston ?
We went back to a 250, made more power and stopped seizing.
I personally went through around 14 pistons and 10 barrels. When we got the power we wanted we suffered with detonation and lack of revs. If we got the revs we didn't make the power.
We used both cut skirts and standard ones. We never had any trouble with exhaust bridges though. The wiseco's seemed to stand up better to the detonation but seized quicker if you didn't prepare the pistons. _________________ If I have to take the carbs off once more...
It is debatable about that ! I think that we have made good improvements with some good R and D . if we all put our info together it will speed up the 300 development. My research has shown the potential of a 300 over a 250.
Is there a way to get NSR150 pistons to fit? Different pin, so something would need to be changed. Are they better pistons? Would it be worth it if it were doable? _________________ MC21 Honda NSR250. TYGA 300 conversion.
The nsr 150 piston uses a 16mm gudgeon pin , could possible make it work but the piston has a different measurement from the pin to the crown so your barrels will be too short .
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