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A backfire is unburnt fuel igniting. Check you have no air being drawn into the engine through a split in the carb rubbers or a loose carb rubber clamp. The easiest way is to let it idle/tick over and spray some carb cleaner around the rubbers. If the engine stutters or stalls then this is where the leak is. An unsealed collector box will cause this to happen as well so check that your exhaust system is correctly sealed and fitted.
have you checked your main fuse is the battery fully charged is there spark at the plug are you sure you havent bumped the kill switch without noticeing it
This is for a 2000 400/640 ignition for KTM 640 lc4-e.
Looking from the perspective of rider seated on motorcycle we have the following colour coded wires going from left to right.:
1. r/w (red/white)
2. bl (blue)
3. o (orange)
4. g (green)
5. ge (Yellow)
.6 g/s. (green/black).
Hope this can steer you in the right direction Brisenod. From Flabbycat
640 LC4 does anybody know if are there any aftermarket spin on oil filters avaliable for this bike? My dealer charges $35.00 for the spin on filters.Yes there are. They are 7.95. Tell your dealer to look in his TR book.,,
640 LC4 does anybody know if are there any aftermarket spin on oil filters avaliable for this bike? My dealer charges $35.00 for the spin on filters.Yes there are. They are 7.95. Tell your dealer to look in his TR book.,,
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