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Life after resuection

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Gateway

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I bought my son an 81 GS 450 L. It had been sitting for about 2 years. The P/O drained the fuel and put mineral spirits in the tank and let fill the carbs. We drained that out and the carbs looked very clean to the eye so back together it went. All the maint. that was lacking probably 4 a long time was addressed and taken care of. It runs fine except the idle seems to be a bit up/down. We ran two tanks of gas through it and it does seem quite a bit better but there is still a slight noticeable fluctuation at idle. The O-Rings in the intakes are new. So, carbs- rebuild or run more gas through and see what happens?
 
You need to clean those carbs properly. Although they might "look fine" on the outside, there are passages you can't see that get clogged with crud. Follow the procedures listed on Basscliff's site thoroughly.
 
Thought you said all the maintenance was addressed? Apparently not.

Short cut are long cuts when it come to maintenance, and the carbs in particular. I'd clean them properly and replace all the various O-rings. Vacuum sync as well.
 
Welcome! Glad to see another 450 popping up :)

As above, a full clean and new O rings from www.cycleorings.com will help you no doubt.

Also, you may find the intake boots from the carbs to the head are old, hard, and potentially a little shrunken which will prevent a good air seal even with new O rings.

Last I checked you can still buy new from Suzuki for about $50 for the pair.

Made a night and day difference on mine...
 
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