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Post by denton424 on Jul 25, 2017 17:20:19 GMT -5
I recently picked up 2 twist n go ls49 scooters. These have been sitting for a while in my grandparents shed, I got them home and started in on them trying to get them back running. Cleaned carbs, cleaned fuel pumps, cleaned tanks the whole 9 yards. Fresh batteries. I then try to start the first one and I have air , I have fuel but no spark. I did some digging around and decided to order a coil and CDI off amazon. Got them in and tested for spark with plug out and got great spark. Put the plug in and fires instantly. Let it idle for about 10 seconds and it dies. Pull the plug and no spark. Let it sit for a bit with out doing anything to it and it will regain spark and run for another 10 second. I changed back to the stock coil and same condition. I can replicate this all day long. After it sits it's fine and starts perfect and runs for 10 seconds. I'm at a bit of a loss and came to you guys here on the forum for some guidance. I'm really itching to ride atleast one of these things! Could the CDI I bought be faulty? Or am I missing something. It does have an alarm but I followed the guide and just have the dark green and green from the main harnes jumperes together at the moment. Kill switch is in plugged altogether so it is not in the system.
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Post by stuckchuck on Jul 25, 2017 21:00:41 GMT -5
first thought is pilot jet is clogged... as when you let its sit the choke resets its self, runs on choke circuit then cant pull thru the pilot jet as the choke circuit closes. second is a float level condition where it cant supply enuf fuel and starves itself out. could be pump or float seat issue. look there first
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Post by denton424 on Jul 25, 2017 23:05:49 GMT -5
So the choke controls spark? My problem is electrical not fuel related.
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Post by pinkscoot on Jul 26, 2017 8:18:09 GMT -5
The CDI would be a good place to start. Cheap after market CDI's are not known for their reliability.
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Post by denton424 on Jul 26, 2017 14:09:08 GMT -5
Ok I have 2 more on order cause they are cheap enough.
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Post by denton424 on Jul 29, 2017 15:30:39 GMT -5
well 2 more CDI's later and still loses spark after about 10-15 seconds of running. im lost??
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Post by denton424 on Jul 29, 2017 16:36:55 GMT -5
both pick up and exciter fail resistance check but pass VAC check? do i have a bad stator?
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Post by denton424 on Jul 31, 2017 18:49:59 GMT -5
Bump
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Post by gsx600racer on Jul 31, 2017 21:57:49 GMT -5
If you have tried different CDI's and coils and they both did the same thing, next try a new stator.
Did you try taking the alarm out of the picture ?
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Post by denton424 on Aug 4, 2017 21:15:00 GMT -5
Got it!! It was the stator. Yes the alarm is out of the picture. Eliminated that so no future problems stem from it. Thanks for the help guys
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