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Bike Running Like Crap
Old 04-16-2011, 07:51 PM   #1
dansykes
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Bike Running Like Crap

I have a spirit 2007 750.Parked bike for about 3 weeks went to crank it up and it ran like crap you know the usual popping,backfiring. Ive had to turn the idle screw all the way up for it to idle.Well I put new plugs in,drained tank and put new gas in with seafoam additive,and pulled carbs and cleaned jets and pilot screws. still runs like crap and it seems to run on the rear cylinder. I fired it up today and took the front cylinders plug wires off and there was no difference in performance. So I switched the coils over and the problem stayed with the front cylinder. Could it be whatever tells the coil to fire and how do I check it? I did check the plug the old fashion way by grounding it against metal and it did have a spark but maybe theres not enough under a load and if so how do you check this also? HELP PLEASE I WANT TO RIDE
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Old 04-16-2011, 08:14 PM   #2
Cruffler
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3 weeks isnt a super long time to sit for the fuel to get laquered, it sounds like condensation water to me. Did you pull the carbs completely apart down to the a/f jet, did you tank them overnight & did you use compressed air to blow out all of the holes?...If not...DO IT!
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Old 04-16-2011, 08:39 PM   #3
mavrick_69_us
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Quote:
Originally Posted by dansykes
I did check the plug the old fashion way by grounding it against metal and it did have a spark but maybe theres not enough under a load and if so how do you check this also? HELP PLEASE I WANT TO RIDE


You are right about that being "the old fashion way". Try putting it on your tongue, like a 9 volt battery.
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Old 04-16-2011, 09:16 PM   #4
EddieMac
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Quote:
Originally Posted by mavrick_69_us
You are right about that being "the old fashion way". Try putting it on your tongue, like a 9 volt battery.

LMAO!!!
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Old 04-16-2011, 10:12 PM   #5
billace
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check your battery's charge
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Old 04-16-2011, 11:53 PM   #6
firefighter212
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Pull all four of your plugs to get a true gauge of what your engine is doing.I dont know how many times i`ve ran into this,people not knowing the bike has four plugs.I would`nt have known that til i read that when i was a noob.
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Old 04-17-2011, 08:17 AM   #7
JayT
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Wow, joined in 2006 and have 7 post, your one hell of a contributor!

Anyfukenway, check ur battery ground, seems to be common...
Would explain ur issue too.
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Old 12-26-2017, 11:55 PM   #8
ssvfd543
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I'm having a problem like this as well. Bike wasn't running right and I thought he plugs had fouled out so I put on new ones. Still didn't help I pulled one of the front plug wires and the engine didn't change so I pulled the other one. Now both front plug wires are pulled and still runs the same. So I pulled one of the rear o es and then it changed. So the front plugs have very little spark but the rear ones have a lot of spark. Anyone have any idea on what to do to fix this. Thanks.
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