Post by legolas on May 13, 2024 14:46:50 GMT -5
Seeking help.
Hello, after replacing some parts with no effect.
Symptoms-when idling for a while then accelerating (all throttle ranges) my scooter does weird gurgling sound for a second or two, has no power then returns to normal and take off. When I go/stop/go/stop without more than few seconds of idle it takes off nicely. Even with leanest setting when I put my leg near exhaust it puffs little bit of black smoke when it sputter, then it’s clean.
Also, engine cut off for a few seconds while rolling 40km/h with full throttle after few seconds ran fine again.sometimes has funky idle and sounds like backfiring when decelerating-deep sound
Parts replaced-new carb, fuel lines and filter, filterbox(orig), battery, intake manifold knee and spacer, spark plug, vacuum lines, fuel+additive, new coil, new petcock as old one was leaking slightly into vacuum hose, tested whole area for leaks with carb cleaner while idling-no leaks found
Cleaned exhaust pipe which was partially clogged from running too rich by previous owner, adjusted valves from 0.15 and 0.18 to 0.1/0.1 and then 0.5/0.8
Tried new cdi same as original however it seems faulty as it doesn’t spark at all-getting replacement tomorrow.
I assume it’s not carburation issue as old carb was max rich, new one I tried to max lean setting and symptoms were same, after test I’ve reseted new carb to factory settings. Opening and closing filterbox had no effect.
I was left with a spark option(assuming it’s not a carb issue and considering puff of black smoke)-which got sabotaged by faulty new cdi. If new cdi won’t help, is there anyone who has any suggestions on what it might be ? All tips appreciated as this is my work scooter and time is money 🫡
files.fm/u/38x2dvyenm
Hello, after replacing some parts with no effect.
Symptoms-when idling for a while then accelerating (all throttle ranges) my scooter does weird gurgling sound for a second or two, has no power then returns to normal and take off. When I go/stop/go/stop without more than few seconds of idle it takes off nicely. Even with leanest setting when I put my leg near exhaust it puffs little bit of black smoke when it sputter, then it’s clean.
Also, engine cut off for a few seconds while rolling 40km/h with full throttle after few seconds ran fine again.sometimes has funky idle and sounds like backfiring when decelerating-deep sound
Parts replaced-new carb, fuel lines and filter, filterbox(orig), battery, intake manifold knee and spacer, spark plug, vacuum lines, fuel+additive, new coil, new petcock as old one was leaking slightly into vacuum hose, tested whole area for leaks with carb cleaner while idling-no leaks found
Cleaned exhaust pipe which was partially clogged from running too rich by previous owner, adjusted valves from 0.15 and 0.18 to 0.1/0.1 and then 0.5/0.8
Tried new cdi same as original however it seems faulty as it doesn’t spark at all-getting replacement tomorrow.
I assume it’s not carburation issue as old carb was max rich, new one I tried to max lean setting and symptoms were same, after test I’ve reseted new carb to factory settings. Opening and closing filterbox had no effect.
I was left with a spark option(assuming it’s not a carb issue and considering puff of black smoke)-which got sabotaged by faulty new cdi. If new cdi won’t help, is there anyone who has any suggestions on what it might be ? All tips appreciated as this is my work scooter and time is money 🫡
files.fm/u/38x2dvyenm