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Post by mik0608 on Sept 9, 2013 19:50:32 GMT 1
Coming back from mot and it started peeing it down,bike was running fine and them out the blue it started to spluter and wouldnt rev. Nearly home and it cleared. Bout a week later same thing happened,started spluttering. Ive changed plug,new coil,cleaned and put a in line filter in and it is the same. Is it something daft that am missing or something serious, any ideas anuony please cheers
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Post by ducatidave on Sept 9, 2013 23:05:36 GMT 1
Coming back from mot and it started peeing it down,bike was running fine and them out the blue it started to spluter and wouldnt rev. Nearly home and it cleared. Bout a week later same thing happened,started spluttering. Ive changed plug,new coil,cleaned and put a in line filter in and it is the same. Is it something daft that am missing or something serious, any ideas anuony please cheers Could be loadsa reasons my nxt job would be check its gettin fuel fast enough ie no rust blocking anywer (tank carb) Them line filters can restrict flow I know this cos it happend 2 me |
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Post by minipete on Sept 10, 2013 0:07:14 GMT 1
Smack of fuel starvation to me, drop the carb off and inspect the bowl, and floats for contamination. good luck!
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Post by arrow on Sept 10, 2013 7:00:19 GMT 1
You didn't mention changing the HT cap?
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Post by bertiemollie on Sept 10, 2013 7:36:35 GMT 1
Wet pod filter?
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Post by mik0608 on Sept 10, 2013 20:06:22 GMT 1
Its had a new cap on aswell
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Post by stockton68 on Nov 10, 2013 16:41:07 GMT 1
got 2 mark2 125lc /one has bottom end gone \other has cdi box shot so put cdi box out of other bike same wires but all it does is back fires like the timing is wrong ?but the cdi box has different number on it will it spark at wrong time
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Deleted
Deleted Member
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Post by Deleted on Nov 10, 2013 18:03:35 GMT 1
used to get this problem a lot when it rained, the ht lead is shorting out against the head due to the water, take it off spray wd40 (or other water dispelling fluid!)in there and when you pop it back on spray all over the cap area and plug etc it should stop the sputtering.
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Post by eddie1969 on Nov 11, 2013 16:53:53 GMT 1
Hello,
Can be a earthing problem,make a thick wire from frame to engine
You can check the advance with a strobe light
If you disconnect the yellow wire on bullet connector it should run without advance,in this way you can test if the cdi works correctly
I have had about the same problem,it looked like misfiring but it turned out to be the carb
Greetz Edwin
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Post by looey on Nov 12, 2013 12:11:53 GMT 1
Hi, I had very similar symptoms with my Mk1 RD125LC a couple of years ago and it was the CDi unit. Would run fine for a while, then start missing and spluttering and wouldn't rev, then it would run fine for days. Swapped the CDi out and it's never missed a beat since  . |
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Post by Eyrey1 on Nov 13, 2013 2:20:14 GMT 1
got 2 mark2 125lc /one has bottom end gone \other has cdi box shot so put cdi box out of other bike same wires but all it does is back fires like the timing is wrong ?but the cdi box has different number on it will it spark at wrong time check you fly wheel and stator for differences ,to the other bike or swap them off the other bike also |
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Post by stockton68 on Nov 13, 2013 21:53:43 GMT 1
sorted that woodworth key had snapped .bike started now has blown other cdi unit .bikes are1985/86 cdi box has white /green .white/red.orange/brown/black/pin yellow/red.have been on ebay all other unit are 6 in the block not 5 will it run on different block
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