I have a 2007 yamaha c3, while riding with no problems the engine cut off...now electric starter will turn but wont crank the engine also engine will not start with kickstarter...all lights working ex

engine does not turn over at all....plug has a spark...starter is turning just not turning over engine engine does not turn over at all....plug has a spark...starter is turning just not turning over engine

thinking it must be sensor switch but dont know where to start thinking it must be sensor switch but dont know where to start

normally if a sensor switch you wouldn't have a spark. check for spark normally if a sensor switch you wouldn't have a spark. check for spark

back to fuel prob, if your sure not fuel prob there next step is to check for compression. if no compression tester take plug out and hold finger to hole. turn over. it should be enough pressure to lift you finger slightly back to fuel prob, if your sure not fuel prob there next step is to check for compression. if no compression tester take plug out and hold finger to hole. turn over. it should be enough pressure to lift you finger slightly

engine is not turning over at all...starter is turning and causing spark but no engine turnover so no compression engine is not turning over at all...starter is turning and causing spark but no engine turnover so no compression

ok the timing sensors are on the krank which control the timing for the spark, if this dont move,, no spark( might get 1 initial spark but thats it) ok the timing sensors are on the krank which control the timing for the spark, if this dont move,, no spark( might get 1 initial spark but thats it)

if thats the case then the starter motor has a fault, it has a flywheel that throws out and connects causing engine to turn. what happens with the kickstart is it solid or feel loose if thats the case then the starter motor has a fault, it has a flywheel that throws out and connects causing engine to turn. what happens with the kickstart is it solid or feel loose

it feels solid but engine wont turn over nothing at all with kickstart it feels solid but engine wont turn over nothing at all with kickstart

i appreciate ur help i appreciate ur help

i have just realised you got an auto clutch, makes bit differentin diagnostics, now on the one hand sounds like a starter prob as i said earlier for starter to spin with no engine movement. that aint right, on the other sounds like engine seized somewhere. putting these 2 things together i would say that where the starter connects to the engine is the place to start looking. starter motor need to come off. needs a visual inspection.it will look obvious if damaged. what we're looking for is why is it not contacting when you try starting it. also we want to see if we can physically turn the engine over, often theres a krank bolt that you can turn with a spanner. i'm still not sure if your able to kick the kick start the normal distance or wether its locking before full distance. i have just realised you got an auto clutch, makes bit differentin diagnostics, now on the one hand sounds like a starter prob as i said earlier for starter to spin with no engine movement. that aint right, on the other sounds like engine seized somewhere. putting these 2 things together i would say that where the starter connects to the engine is the place to start looking. starter motor need to come off. needs a visual inspection.it will look obvious if damaged. what we're looking for is why is it not contacting when you try starting it. also we want to see if we can physically turn the engine over, often theres a krank bolt that you can turn with a spanner. i'm still not sure if your able to kick the kick start the normal distance or wether its locking before full distance.

i will have to try that tmw...let u know more then thx i will have to try that tmw...let u know more then thx

no probs mate, i done a little research, there a return call on the fuel pump but this still wouldn't explain why the engine done turn. obviously i dont know your mechanical knowledge. i take it your positive the engine dont turn over, i dont mean running, just spinning over when the starter is pushed. no probs mate, i done a little research, there a return call on the fuel pump but this still wouldn't explain why the engine done turn. obviously i dont know your mechanical knowledge. i take it your positive the engine dont turn over, i dont mean running, just spinning over when the starter is pushed.

done=dont done=dont

yes it doesnt turn over yes it doesnt turn over

i am thinking engine siezed i am thinking engine siezed