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Which engine do I have?

  • Thread starter Thread starter MrZig
  • Start date Start date
imnowhooked said:
Seems I read on here somewhere that if the vacuum operated petcock is malfunctioning it will let fuel flow through the vacuum hose & you can end up with fuel in the crankcase which is not good! I could be way off because I am still learning so maybe someone else will elaborate soon & correct me if I am wrong. Seems like I read also that if you plug the vacuum line & run the petcock on prime it may be a temp fix, but like I said I am not 100% positive. Don't hold me to that I just wanted to let you know we are still out here. Good luck man!
Click to expand...

Thanks for the input. I made another thread about this specific issue here: http://www.thegsresources.com/_forum/showthread.php?t=137559

Seems like there's 2 points to the issue. A) it sucks in excess gas through the vacuum hose. B) the pressure from the gas tank overcomes the float bowl and the excess gas leaks into the engine. On carbs that were not ruled by EPA restrictions, they appeared to have a drain-hose that would spill out excess fuel in the carb thus preventing oil contamination. However, on 1980? and up motorcycles in the USA, this drainage hose was banned and the excess fuel would end up in the crank case.
 
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Man I guess I am lost in my own world, sorry bout that, maybe its time for me to go to bed! :confused::o:confused::o
 
focus frenzy said:
thats one of the interesting oddities about Suzuki, they kept the motor mount positions the same on the 400, 425, 450, and 500 twins (the tempter twin likely is a drop in) you can go and get a brand new GS500 engine and it will bolt right up in a 1976 GS400 frame.
the only complication being Suzuki rotated the exhaust ports inward to clear the perimiter type frame used on the 500 twin so exhaust clearance in the early GS frame is a problem.
you need a custom exhaust.
Click to expand...

the tempter 650?

oh pleeeeaaase say yes! :D
 
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