Smokey74

I believe the 80 850glt has the lever and is 50mm. My plan was to get one and try to modify as noted by Wolf.

I'm sorry but I don't follow.. What did you do to the diaphragm?? My buddy has that petcock on his GS850L. Not the same as mine but the same process should work.

Nice! Thanks.. I was actually just talking to a buddy today about possibly making one. It's not an urgent issue for me but something I want to deal with by spring. I'm currently making minor rust repairs and doing a fender delete. I know it's sacrilegious to modify an unmolested 38 y/o GS but I just couldn't take that big chrome fender and shoebox light. I'm trying to make the mods in a way that still looks period correct so no LED's, etc.. I have a few parts on order and a piece to fabricate for the new tail but it's already looking better. Seat is out being repaired too.

I found that info too but not accurate for my model.. 50mm bolt spacing. Yamaha 43 or 44mm. Don't remember exact at the moment but it wouldn't work.

Well.. this blows

My research indicates petcocks from any Suzuki GS550LT (80), GS750ET/LT (80), GS850GLT (80), GS1000ET/GLT/ST (80) or GS1100ET/LT (80) are the same 50mm spacing and OEM fitment. Now I'm just trying to figure out which of those are non-vacuum type.. If anyone knows for sure, please speak up. Thanks!

Thanks for the info.. At this point if I could just find out how to properly use and/or adjust the stock petcock it would make me feel better. I can turn this thing multiple times and set in any position and it runs the same. I measured it on the bike without removing the tank and it appears you are correct at 50mm.

I'm not sure.. I have not removed the tank at this point.

Hey all.. New to this forum. Searched everywhere and trying to confirm the proper petcock and possibly complete a swap to non-vacuum type. I've attached a picture of my petcock. Changing the position with a scewdriver does nothing. Bike runs great and no issues but I would prefer a petcock that I can actually turn off. I read somewhere about a Raptor petcock swap but wasn't able yo confirm what bikes that works on. Any help or links would be appreciated. My 80 GS badge indicates GS1000L but my local dealer says it is actually an LT. It's my 80's throwback "cruiser" when I take the wife out. When I want to go fast I have my 2016 GSX1000. * pic of newskool Suzuki deleted *