driving me bloooody mad

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
Tosh
registered user
Posts: 268
Joined: Fri Jan 16, 2009 11:22 am
Location: coppull,lancashire
Contact:

since it nipped up coming back from egg run,i`ve re-hoaned it replaced base gasket which was the cause,one with the orange writing one,think other people av had probs with them.
now its all back together ive not changed nowt but it wont go at low revs its as tho its choaking/spluttering then when i wack the thottle to the stop it goes for about 50yrds then goes like stink when its cleared its throat,when i got back home the wadding in the end can was on fire untill i can sort a van out too take it to sean/dan`s i`m off the road does anyone have any idea`s :cry:

Thanks Paul
User avatar
coaster
registered user
Posts: 3125
Joined: Wed Jan 07, 2009 12:35 pm
Location: London and Norfolk
Contact:

Does it run any better with the choke out? could be an air leak somewhere or a blocked pilot jet maybe.

End can on fire :shock: that doesn't sound good, have you checked your plug colour? it could be running weak :?
Tosh
registered user
Posts: 268
Joined: Fri Jan 16, 2009 11:22 am
Location: coppull,lancashire
Contact:

thanks coaster,
no diff with choke out , carb cleaned and jets checked,plug colour looks ok
tarmac tickler
registered user
Posts: 102
Joined: Wed Jan 07, 2009 11:12 pm
Contact:

electronic ignition? check your readings... wadding getting soaked with unspent fuel and when it gets hot it catches light,if you take off the flywheel check theres no swarf stuck on the magnets confusing the pick up causing it to misfire, could just be rust on the magnets if youve not used it since easter..
Tosh
registered user
Posts: 268
Joined: Fri Jan 16, 2009 11:22 am
Location: coppull,lancashire
Contact:

Thanks tarmac tickler will have a look when i get home from work tonight
J1MS
registered user
Posts: 1153
Joined: Sat Jan 10, 2009 12:02 am
Contact:

I would think it's ignition. Most likely CDI or pickup. It's getting a spark (but probably not at the right time) so I would think that the LT coil is intact and working.

A failing thyristor in the CDI could cause these symptoms, try substitutng parts from a working scooter, fit New CDI flywheel and stator, make sure it runs then replace with your CDI first see if it runs, next the stator and start it again, last the flywheel

Sometimes it's easier to fault find by substitution when the engine still fires as the readings you find might be correct, but when it runs the fault developes.

Hope you sort it,

PS I did ring, so you have my number if you need any help.
shocky
registered user
Posts: 2139
Joined: Wed Jan 07, 2009 12:33 pm
Location: cheltenham
Contact:

earths ,plug, plug cap,ht lead check all ign connections have you drained the fuel and put fresh in also might be woth bypassing the ign switch as wel good luck
We sleep soundly in our beds because rough men stand ready in the night to visit violence on those who would do us harm
Tosh
registered user
Posts: 268
Joined: Fri Jan 16, 2009 11:22 am
Location: coppull,lancashire
Contact:

thanks j1ms/shocky
allready done plug/lead/cdi/petrol, going the j1ms route now will attack it later this week and will let you know how it works out.
Tosh
registered user
Posts: 268
Joined: Fri Jan 16, 2009 11:22 am
Location: coppull,lancashire
Contact:

well just to let you all know who replied to my probs i went the J1ms route and hey presto since changing the stator/flywheel all is running much better but is still slightly week will try to sort a date with dan/sean but away with caravan next week to the east coast, it looks as it was the stator after all ,would it be possible to change the pick up easy.

Thanks again Paul
User avatar
drunkmunkey6969
Moderator
Posts: 2838
Joined: Sun Jan 04, 2009 1:42 pm
Main scooter: '69 Lambretta GP
Location: North Yorkshire
Contact:

Tosh wrote:well just to let you all know who replied to my probs i went the J1ms route and hey presto since changing the stator/flywheel all is running much better but is still slightly week will try to sort a date with dan/sean but away with caravan next week to the east coast, it looks as it was the stator after all ,would it be possible to change the pick up easy.

Thanks again Paul
Give me a shout when you're ready bud. ;)
See our YouTube scooter channel for Tech-help: https://www.youtube.com/c/TheScooterFactory/videos
Post Reply Previous topicNext topic
  • Information
  • Who is online

    Users browsing this forum: Semrush [Bot] and 7 guests