2009 Yamaha YZF-R125 spark plug fault !!!!!! Hi, i bought a spark plug off ebay some sort of performance plug,, i checked the plug to the original before placing it into the head of the engine they looked simular sooo i put the peformance plugg in the bike tried the eletric start and the bike was choking like it wanted to start but never did sooo i took peformance plug out made sure i had a spark it did so i replaced the plug with the original plug the bike fired upp straight away so i put peformance plug back in and still no joy so like a *** i decided to try and bump start,, no joy so i replaced with the original plug then the bike would not start !!! but since bumping it with a brand new standard plug it eventualey starts but does have serious issues with staying running and alot of bogging involved any help would be verry greatfull
SOURCE: My 9 month old Yamaha YZF-R125 has been cutting
Sounds like you have either got water in the system or poor connections.
You can use something like dielectric grease on each connector. It is a bit of a pain having to open and close each connector on your bike, but once you've done it, you shouldn't need to do it again for a long, long time.
SOURCE: bike wont start engine management light flashing
do you start the engine with the side stand down?
this will cause engine to cut out.
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also since this problem i have
cleaned the carb injectors out
i have replaced the coil pack
and put a brand knew battery onn
still no joy
turned out the performance plug had FXXXED my old engine up due to the plug being a fraction bigger than the standard plug so when i tried bump starting the bike with the performance plug the piston must have hit it sooo i recomend check up before thinking youve orderd a pluk for a certian bike
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