GT 550 J SRIS valve

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Chrisb
Still in the Driveway
Posts: 4
Joined: Fri Oct 13, 2023 12:39 am
Country: Australia
Suzuki 2-Strokes: 1972 GT 550J

GT 550 J SRIS valve

Post by Chrisb »

Does anyone know if it is possible to adapt the crankcases of the GT 550 J that use the pressed in SRIS valves to accept the screw in type valves.
Any advice welcome.
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Alan H
Moto GP
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Joined: Thu Feb 16, 2012 11:50 am
Country: England
Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
Location: The Republic of South Yorkshire

Re: GT 550 J SRIS valve

Post by Alan H »

A couple of options spring to mind - this one that I did on my J resto, here - https://www.kettleclinic.co.uk/kcforum/ ... RIS#p99650 on my J rebuild some time ago, or just cut threads in the crankcase for the threaded ones. You'll need to split the cases to clean out any swarf if you do it that way though.
Easiest is 'my way' and use loctite to keep them in. 3 years on and they haven't shifted.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
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