'83 GS650L - crazy large reserve?

[sacruickshank]

The fuel sender is shot on my 650L so I don't know the fuel level from the gauge, but I reset the trip meter every fill up and seem to be switching to Reserve after ~90 miles. The carbs are synced, valves set, it's well tuned, but I had to make some guesses on the air/fuel mixture settings due to carb damage and a stuck screw. New needle valves so I *shouldn't* be getting any overflow.

original tank and petcock, which seems to be functioning properly for the first 80-90 miles of a full tank. Is the reserve super large or should I check for something weird in the fueling?

[tom203]

It’s small tank…maybe 3.3 gal capacity, so you going to be hitting reserve early - 90 miles or two hours running.
Plus some petcocks have higher fuel level point where you have to switch over.

[rphillips]

Most standard Suzuki's have appx. 5 gal tank with appx.4 gal ON, then 1 gal. is res. That's appx 20% of full is res. I just looked up your GS650L & it has a 3.2 gal tank, not a clue if the same, but 20% of a 3.2 gal tank would be 2/3 gal on RES.

[sacruickshank]

Most standard Suzuki's have appx. 5 gal tank with appx.4 gal ON, then 1 gal. is res. That's appx 20% of full is res. I just looked up your GS650L & it has a 3.2 gal tank, not a clue if the same, but 20% of a 3.2 gal tank would be 2/3 gal on RES.

This tank is small, 3.2 gal. If they used the same petcock on the 650L as other GS models with larger tanks, the same tube height for ON might be reached pretty quickly on this small tank. I'll assume everything is OK and fix other things on other projects.