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Finaly got the bike fired up after cleaning carbs,engine runs ok at 1500 revs and over but knocks about and dies below this,could the carbs being out of sync be the problem,i done them roughly of the bike by using feeler gauges under the butterflys,i am going to borrow some vacume gauges and do them properly,any thoughts on the problem appreciated,also where can i get hold of the 5 mm spigots i need to screw into the manifolds,cheers john.
 

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You probably failed to get the idle circuits cleaned out and/or got carb cleaner in the air cutoff chambers and destroyed the diaphragms.
 

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Hi,thanks for the reply,diaphragms are ok i was very careful that way,i was wondering about the idle jets,if i have to remove the carbs again what is the best way to clean them i know they can be a problem as they are pressed in,cheers john.
 

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Those jets are very hard to clean as the orfice is tiny. Possibly a very small needle or fine wire and as a last resort they can be removed but threading a small screw into the end and pulling them out.
 

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I cleaned the idle jets with a single strand of wire from a broken throttle cable.
 

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I'd try and do a carb synch first before you tear into the carbs again. Doesn't have to be fancy, you can fabricate a 'gauge' using 20' of clear tubing, some zip ties, a yard stick and ATF. Works well enough to eliminate the 'rod knock' sound of an unbalanced carb.



BTW did you happen to take apart the microfilter at the carb inlet? Mine was JAMMED with tank sediment. You should have seen the junk in the bottom of the bowl.
 
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