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Post by hawgstompr on Apr 9, 2013 8:43:16 GMT -5
I have a 2005 qingqi scooter that i've been tinkering with for a while now. It has a tb60 big bore kit on it, and was told i need a beefier coil. I've looked around, and found a high output coil for 2 stroke mineralli style motors between 50 to 90cc. I was wanting some advice as to whether or not it may be compatible with my style motor. Sorry for the stupid question, but i haven't been able to find a straight answer yet
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Post by indymoped on Apr 9, 2013 11:34:02 GMT -5
Unless you are getting a misfire or power loss your stock coil should be fine.
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Post by hawgstompr on Apr 9, 2013 12:37:51 GMT -5
Whenever it hits a certain rpm(im usually doing about 25-30 when it hits, depending on the road grade) it'll start to sputter and intermittently loose power. If i can make it past that 'hump', usually on a flat plane or slight slope, it'll be fine. It's just that sweet spot that it bogs down. I've been told a performance coil, along with rejetting the carb would fix the problem. If the stock coil should work, then maybe i just have a bad connection somewhere. Still need to rejet to see if that makes any difference
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Post by tvnacman on Apr 9, 2013 19:00:38 GMT -5
Whenever it hits a certain rpm(im usually doing about 25-30 when it hits, depending on the road grade) it'll start to sputter and intermittently loose power. If i can make it past that 'hump', usually on a flat plane or slight slope, it'll be fine. It's just that sweet spot that it bogs down. I've been told a performance coil, along with rejetting the carb would fix the problem. If the stock coil should work, then maybe i just have a bad connection somewhere. Still need to rejet to see if that makes any difference Its not your coil , its the carb . Hang around Alley is really good with carbs . When the peoblem happens back off the gas a hair see if it settles down . John |
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Post by carasdad on Apr 9, 2013 19:30:04 GMT -5
Agree with the above. Also a bbk does not need a bigger stronger coil. If that were the case...why can and does a 150cc scoot use the same CDI and Ignition Coil as the tiny 50cc scoot?. Nah...you have a carb problem. Coils do have problems with spark at times....but that manifests itself at WOT....full throttle normally. The high rate of speed of current flow is more than old worn windings can handle and this causes a break down in its field. If ya don't wanna mess with all the hassle of taking the carb apart...cleaning then tuning it...get a new carb from tvacman up above. They are not very costly.  |
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Post by alleyoop on Apr 9, 2013 19:53:02 GMT -5
Whenever it hits a certain rpm(im usually doing about 25-30 when it hits, depending on the road grade) it'll start to sputter and intermittently loose power. If i can make it past that 'hump', usually on a flat plane or slight slope, it'll be fine. It's just that sweet spot that it bogs down. I've been told a performance coil, along with rejetting the carb would fix the problem. If the stock coil should work, then maybe i just have a bad connection somewhere. Still need to rejet to see if that makes any difference Since it happens around 25-30mph which is were a 50cc transition to mainly the MAIN JET for fuel it could be either to rich or to lean at that point. But here is a Trick of the Trade to let you know what the motor needs when that happens. Bring it up to around those mph and as soon as it starts to ACT up BACKOFF THE THROTTLE about 1/4 OF AN INCH and hold it there. A. IF the motor speeds up it is LEAN, it wants more fuel at that point. B. IF the motor stumbles, hesitates and or just SETTLES DOWN it is RICH, it wants less fuel at that point. Give it a shot and get back on what the motor did. Alleyoop |
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Post by carasdad on Apr 9, 2013 20:16:28 GMT -5
Whenever it hits a certain rpm(im usually doing about 25-30 when it hits, depending on the road grade) it'll start to sputter and intermittently loose power. If i can make it past that 'hump', usually on a flat plane or slight slope, it'll be fine. It's just that sweet spot that it bogs down. I've been told a performance coil, along with rejetting the carb would fix the problem. If the stock coil should work, then maybe i just have a bad connection somewhere. Still need to rejet to see if that makes any difference Since it happens around 25-30mph which is were a 50cc transition to mainly the MAIN JET for fuel it could be either to rich or to lean at that point. But here is a Trick of the Trade to let you know what the motor needs when that happens. Bring it up to around those mph and as soon as it starts to ACT up BACKOFF THE THROTTLE about 1/4 OF AN INCH and hold it there. A. IF the motor speeds up it is LEAN, it wants more fuel at that point. B. IF the motor stumbles, hesitates and or just SETTLES DOWN it is RICH, it wants less fuel at that point. Give it a shot and get back on what the motor did. Alleyoop Good input. That method is a tried..true and proven method. You should have Doug put that in the 'Tech' section here. Have seen a few customer scoots REALLY messed up when they were trying to fix a carb problem and just guessing and tinkering. One guys scoot..he has the A/F out 5 turns...had changed his main jet..left it in and changed his pilot jet....so he thought the float was not allowing fuel flow..so he bent the tab that the float needle rides on.  I clamped off the fuel line and left it outside until it was done dripping gas. He NEVER mentions anything...says he did not fool with the carb.. 2 hours later his conscience kicks in and he tells me all he did.(Ever wanna choke people like that for wasting your time) So what do ya do...put it all back to stock and go from there. All it needed? Main Jet needle raised up a notch..  |
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Post by tvnacman on Apr 9, 2013 20:26:50 GMT -5
Ya then you spun ur wheels ask for a few extra $ and they bark at the price .
John
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Post by carasdad on Apr 9, 2013 20:36:40 GMT -5
Ya then you spun ur wheels ask for a few extra $ and they bark at the price . John John...EXACTLY what happened. I told him this 30 min job took 2 hours 20 minutes of my time..it will be $30 more.( I only charge $40 per hour as the other 5 shops within 50 miles charge $75) Soo $30 more for a 30 min job that took 2 hours 20 minutes is FAR from unreasonable. He bickered and fussed...wow! So I point to a kids  Quad and tell him...see that?...needs a stator and lil repair on the headlight wiring...2 hour job..that would put $80 in my pocket..yet that time went to you..and all I am asking is $30 not $80. Never heard so many cuss words crammed into 2 sentences in my life! He wadded up the money and tossed it towards me....lol..some people... |
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Post by alleyoop on Apr 9, 2013 20:51:29 GMT -5
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Post by carasdad on Apr 9, 2013 21:08:17 GMT -5
Hey..ok...way kewl..now I know where to direct someone with one click vice typing a Novel on carb testing...lol... ;D |
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Post by hawgstompr on Apr 10, 2013 17:08:29 GMT -5
Thank for the advice guys. I spent a lot of the night and most of this afternoon playing with the carb. Last night, i sealed off the port in the carb that accepts the oil(i removed the pump when i got it) and it seemed to fix the problem all around. Tried a run this morning, and it would die off the line with 3/4 to full throttle. Unsealed that port only to realize my clutch wasn't catchin. After i took some emory cloth to it and put everything back together, it ran fine. Im stumped, but happy for now
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..BAD TO THE BONE..
I clamped off the fuel line and left it outside until it was done dripping gas. He NEVER mentions anything...says he did not fool with the carb.. 2 hours later his conscience kicks in and he tells me all he did.(Ever wanna choke people like that for wasting your time) So what do ya do...put it all back to stock and go from there. All it needed? Main Jet needle raised up a notch.. 
Quad and tell him...see that?...needs a stator and lil repair on the headlight wiring...2 hour job..that would put $80 in my pocket..yet that time went to you..and all I am asking is $30 not $80. Never heard so many cuss words crammed into 2 sentences in my life! He wadded up the money and tossed it towards me....lol..some people...