Cleaning Carbs

Like the the info here alot. I am new at working on bikes. My 650 sat for a year and now has no mid or high range speed. Crack the throttle and it just stalls. I think this carb info is going to help alot.
 
random ? but do all carbs have a bracket holding them together? I have a 76xs and they were separate...2 minuki bs 38s. Do I need a bracket? and if so where could I find one?
 
As with everything else on the left coast, Seafoam has been known to cause cancer in the state of California. You just need to cross a state line where you can bathe in the stuff without a problem.
 
mkesbest, on carbs they used two separate carbs, two throttle cables. up to 75. In 76 they started using the linked carbs. They use one throttle cable.
Your 76 should have come from the factory with Linked carbs.
If you have the two separate carbs, a PO must have swapped then out. This is not a problem. They will take just a bit more maintenance to keep running at their best.
You need to determine just which carb set you have. Yamaha changed carbs every two years. As in 70-71 was a set, 72-73, 74-75, 76-77, you get the idea.
www.xs650.fi/pohja_files/fi/XS650carbs.htm is a ID guide for the BS38's It was translated through a couple languages so some of the wording is hard to understand but the pics help a lot.
Leo
 
Sea Foam is a brand of engine treatment/cleaner. You can add it to gas to help clean out the carburetors and help keep the gas fresh. You can also add it to the oil. In cars, some people unhook the PCV valve and dump it right into the intake.

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Click 'Motor Treatment' http://www.seafoamsales.com/
I have been using this fuel treatment for several years in all my bikes, antique tractors and generator...Never any issues with dirty carbs... Not snake oil, or a mechanic in a bottle, Just chemistry at work..

 
I have a problem with my carbs
I took them off to clean them and one of the pilot jets was stripped and I can't get it out to clean it properly
So I just cleaned everything else and when I start the bike and let her run I get a popping sound from the exhaust
I dropped my carbs in a solventvtank tank for a few days hoping to clean them out
Is there any way to get the pilot jetvout or could the popping be something else
 
If you are unable to get the jet out, perhaps you could clean it in place by carefully using the proper sized orifice tool. They are inexpensive.
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Yes, the popping could be something else, as well.
It typically is due to a lean mixture, such as leaking at the exhaust manifold gasket at the head (popping upon decel).
If you search for "popping" in Garage you will get lots of threads to study.
Good luck with the carb.
 
Simple answer, given many times: Don't! Rebuild kits typically contain generic items that won't work, stuff that you don't need, and all too often substandard repop brass. It's best to decide what you need and order genuine Mikuni parts individually.
Thanks you
 
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