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hi well just finished cleaning my carbs [1100gw] and added new timing belts. everything

fine except it still backfires at a higher throttle also hesitates a bit.. what could do this?

i dumbly stare at the housing trying to suss out the problem i thought maybe coils

breaking down under load.. this is the same problem i had before carb cleaning

the bike has 45k miles so dunno can anyone help??

thx gumby
 

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Can't see it being carbs if you already cleaned them. Coils or sparker unit come to mind...
 

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Did you do a synch after the rebuild?
 

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Have you changed the cam belts ? Might want to pull the covers and check the timing marks, you could also do the flow-test for the fuel pump. I can't recall if the manuals list any sure-fire tests for the spark or electronic advance units, but swapping out parts can get expensive in a hurry... :gunhead:
 

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1987 GL1200 Interstate
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Hi Gumby,

Hesitation and backfire? Sounds like the timing is not advancing. One thing could cause that is the ECU. The unit could be bad or you might have a leak in the vacuum hose going to it. There's a test procedure for it in the manual.

Your profile doesn't say where you are located.
 

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Bike might be running a lil lean. Are you sucking air anywhere from a leaking gasket on the intake side? How did you set your float height? Did you check to see if the plungers in the carbs were sticking or moving free?

check vacuum lines for splits or other leaks.

Try a lil choke & see if the bike reacts better from that.
 
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