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Old December 16th, 2012, 09:44 PM   #1
 
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Question 06 brute force 650, missing and popping

cuz has an 06 bf 650 120 hrs never abused and no mods.the thing will start with choke on , then will not idle with choke off. the warmer it gets the worse it pops nand backfires.have cleaned carbs till you could perform surgery with them. ran the valves all ok.checked fuel pump and it is producing well.can turn idle adj in or out with no change at all. also can run air /fuel screws in or out with no change put in new plugs also , the spark appears weak but not sure. can anyone point me in the right direction?
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Old December 16th, 2012, 10:14 PM   #2
 
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cuz has an 06 bf 650 120 hrs never abused and no mods.the thing will start with choke on , then will not idle with choke off. the warmer it gets the worse it pops nand backfires.have cleaned carbs till you could perform surgery with them. ran the valves all ok.checked fuel pump and it is producing well.can turn idle adj in or out with no change at all. also can run air /fuel screws in or out with no change put in new plugs also , the spark appears weak but not sure. can anyone point me in the right direction?
Welcome to Brute Central.
By you saying it won't run with the choke off and there us no change when you adjust the a/f screw nor the idle control, its clear there is either a major vacuum leak like with split boots or there is no fuel supply for the slow circut and that comes from blocked pilot jets or tracks or...extreemly low float levels....or water in the bowls..but I assume we can rule that out.
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Old December 16th, 2012, 10:56 PM   #3
 
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drained tank and made sure it has fresh gas,haven't sprayed around boots yet to chaeck for vaccum leaks. seems odd that niether pilot jet seems to make any diff. can't see both plugging at same time and like i said i've cleaned carbs to death.
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Old December 17th, 2012, 09:29 AM   #4
 
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drained tank and made sure it has fresh gas,haven't sprayed around boots yet to chaeck for vaccum leaks. seems odd that niether pilot jet seems to make any diff. can't see both plugging at same time and like i said i've cleaned carbs to death.
Too young to have can chain issues. He isn't trying to run it without the airbox on and lid shut...right? Cause it won't run without it.
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Old December 17th, 2012, 01:32 PM   #5
 
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no. airbox gets put back on and lid too.i still think i've missed something in carbs. gonna try again wed. pm. also gonna run commpression test and check for vaccum leaks.Any thing else?
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