Lammy running sh*te
Posted: Sat Aug 15, 2009 9:30 pm
Having a mare with my normally super reliable Imola
I changed to a JL4 from a ScootRS pipe and found the midrange fourstroking. It also needed new clutch plates and the gearing altering so decided to bring it indoors n kill 2 birds with one stone.
changed clutch n gearing but then scoot wouldn't pull over 1/4 ish throttle, really spluttery.
Thought this might be electrical so bit by bit changed the CDI, plug, ht lead, plug cap and still no different.
Then thought it might be rings or reed petals so took top end apart. Reeds fine and fitted new rings just for measure whilst I had it in bits. Still ran crap.
Then thinking it could be carb bought a second 28mm phbh carb and fitted jets as below
choke 70
idle 60
av264
x13 second clip down (already tried x2)
130 main
airscrew 1 1/2 out
300 float needle valve
still ran poor so tried 125 main - no difference. Today swapped out the stator for a new bgm one and still seems like its fourstroking above 1/3 throttle. It does not rev out, in fact barely makes 35mph !!! With the above I might have been slightly out but surely not that far that it won't run?
tried running with no fuel cap on in case its a vacuum thing. Tried turning on choke - at low throtlle it wants to die, at full throttle - makes no difference.
Am now really really curious what is causing this. Any help fellas?
I changed to a JL4 from a ScootRS pipe and found the midrange fourstroking. It also needed new clutch plates and the gearing altering so decided to bring it indoors n kill 2 birds with one stone.
changed clutch n gearing but then scoot wouldn't pull over 1/4 ish throttle, really spluttery.
Thought this might be electrical so bit by bit changed the CDI, plug, ht lead, plug cap and still no different.
Then thought it might be rings or reed petals so took top end apart. Reeds fine and fitted new rings just for measure whilst I had it in bits. Still ran crap.
Then thinking it could be carb bought a second 28mm phbh carb and fitted jets as below
choke 70
idle 60
av264
x13 second clip down (already tried x2)
130 main
airscrew 1 1/2 out
300 float needle valve
still ran poor so tried 125 main - no difference. Today swapped out the stator for a new bgm one and still seems like its fourstroking above 1/3 throttle. It does not rev out, in fact barely makes 35mph !!! With the above I might have been slightly out but surely not that far that it won't run?
tried running with no fuel cap on in case its a vacuum thing. Tried turning on choke - at low throtlle it wants to die, at full throttle - makes no difference.
Am now really really curious what is causing this. Any help fellas?