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1992 Suzuki LT 250R glass window


swfjeep44
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Dream Car Giveaway

After thinking about this, I think that motor has a sight glass over the powervavle, and I don't think that there is one for the tranny oil. I believe the window is there so you can visually check to see if the powervalve is working. It has been a long time since we had ours, so I don't remember exactly. Maybe Scott will see this thread and chime in, he rides an old Quadracer too.

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I cannot locate my manual right now but it appears that the sight glass is for exhaust valve.

I found this on another forum:

at idle, the valve should be open, through the sight glass the arm should be down.

once the RPMs increase enough to close it, the arm goes up(rod pushes it up.)

the spring adds just a slight amount of additional pressure and allows you to tune the RPM the valve closes by how far you turn the knob... a significant change can be had with only +/- 1/4 turn from 360CCW.

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