Carbs needs to be taken apart and cleaned. What I did with my GL 1500 SE was put in some Amsoil Carb cleaner(don't recall the proper name at this time) for cars in the gas tank and within a tank or so, it straightened right up. This may not be recommended by all but mine never run better.
SOURCE: I start bike by using choke on cold start after 2
hi nl friday,
here is a trick i learned from a friend who is a great fan of V twins.
on cold starts he usually opens the drain plug to let the carb balancer / floater set. once a few drops comes out, open the choke then start the engine. right after pushing the choke back, twist the throttle to force the jet to spray out.
hope this will work for you.
regards,
voodoo
SOURCE: Keihin CVK-D36 carbs on a 20 yr old ZZR 600
It sounds like your bike has been sitting in storage for an extended period of time (a year or more) - and the carburetors are plugged up. If this is the case, they will need to be completely disassembled and cleaned out.
If it hasn't been sitting (and the carbs aren't plugged up) then check that all of the normal tune-up items have been performed, especially valve adjustment, oil and filters, spark plugs, etc. If this fails to produce positive results, perform a compression check on the engine. Each cylinder must be able to produce at least 140 psi of compression in order to run and idle properly.
SOURCE: starts with choke pulled out, but when choke pushed in it quits
If the choke has to be on for the engine to run then there is a lean fuel mixture problem, and chek for a loose carburetor, intake bolts, dis-connected or missing vacuum lines/caps, or damaged carburetor or intake gaskets. Also, the engine idle rpm might be too low, the air/fuel mixture might be too lean, or the carburetor could be plugged up internally.
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