50cc sense scooter starting issue
- This topic has 3 replies, 2 voices, and was last updated 4 years ago by .
-
Posts
-
-
Hi, I recently purchased a 2000 hyosung sense scooter (SD50) with only 84 genuine klm on the clock. Garage stored and like new.
first 100 k no problem. Next 200k it started randomly cutting out then started and ran again once cool.
At 300k the engine suddenly seized.
stupid plastic oil pump drive gear had stripped teeth and stopped pumping 2 stroke oil. Ok that fault is understood.
new piston and barrel fitted but no start, nothing.
I have fuel to plug and I have spark, although I think it’s weak. Timing I think, did seize shear the rotor key way? No, key is fine, all stators check out as per service manual and 48v AC being delivered to cdi unit.
but …what does confuse me is there is no obvious trigger coil for ignition timing. The CDI unit is wired quite uniquely and I have ordered a new one from Hyosung as nothing I can find matches and I thinking the original cut out problems where cdi related.
ive now checked everything and all are within manual spec. Help! -
Have you also tried a new ignition coil , spark plug and plug cap too.
if the spark is there that means the cdi is sending the signal , if not , the cdi wouldn’t be sensing the engine spinning or feed from the magneto to trigger it to fire the coils.
-
-
-
- You must be logged in to reply to this topic.