Keeps Cutting Out

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
Strummer10
registered user
Posts: 380
Joined: Thu Oct 11, 2012 7:17 pm
Main scooter: Lambretta LI Special 225
Contact:

Wed Apr 06, 2016 11:12 pm

Guys, I gotta look at a mate's GP 200 tomorrow. He was on a ride out a few weeks back and it just suddenly stalled, after which he kept starting and it stalled again a few hundred yards down the road. We changed the spark plug and cleaned out the carb and he got home on it (15 miles) then tonight he was on he's way round to me and it cut out again within a mile (same as before).

Any suggestions to consider ?

Adam_Winstone
registered user
Posts: 1755
Joined: Tue Jan 31, 2012 8:54 pm
Main scooter: Lambretta GP
Contact:

Thu Apr 07, 2016 2:43 am

Indian stator plate failing?

User avatar
Muttley McLadd
registered user
Posts: 2549
Joined: Wed Jan 07, 2009 6:32 pm
Contact:

Thu Apr 07, 2016 5:01 am

Ignition switch is a cheap check.
CakeAndArseParty

User avatar
Toddy
registered user
Posts: 5002
Joined: Sun Mar 08, 2009 12:01 am
Main scooter: Lambretta Series 1
Location: East Yorkshire
Contact:

Thu Apr 07, 2016 6:18 am

Start with the easy checks Wiring , Ignition switch, , plug , cap , lead , CDI and work back to stator (which it probably is as Adam says)
As my Dad used to say "Each to their own lad"

Chris in Margate
registered user
Posts: 402
Joined: Thu Sep 03, 2009 7:53 pm
Main scooter: Lambretta 1964 225 Special
Contact:

Thu Apr 07, 2016 6:32 am

So it ran ok for 15 miles after plug change and carb clean.
Petrol cap breather blocked ?.
More muck dragging into carb ?
Cut ends of HT lead back 1/2 inch and refit.
CDI swap

Easy things first.

Strummer10
registered user
Posts: 380
Joined: Thu Oct 11, 2012 7:17 pm
Main scooter: Lambretta LI Special 225
Contact:

Thu Apr 07, 2016 7:22 am

Cheers ALL for your thoughts. Gonna pop round today with the electrical tester and check the stator, look at HT cap and lead. Is there anyway of testing the CDI (coil) unit ? OR is the thought just change over for a new unit ?

I know last time it kept cutting out we stuck a new coil on it and it was fine and he said to me yesterday, 'surely it can't be that cos it's new' and I said yes but even new parts are dubious nowadays........its not the good old 1980s I said lol :D :mrgreen:

mick1
registered user
Posts: 1528
Joined: Sun Dec 04, 2011 7:43 pm
ebay user ID: saxonleaf
Main scooter: Li Avanti 225
Location: York
Contact:

Thu Apr 07, 2016 7:26 am

Stator looks a good call, CDI units are best swapped to check.

No "waterproofs" under the seat blocking the air scoop ?

Might be worth checking the flow rate from the tank as well.............

User avatar
Monty
registered user
Posts: 507
Joined: Wed Jan 07, 2009 7:21 pm
Main scooter: Series 1 Muggy, Imola Special
Location: STOCKPORT
Contact:

Thu Apr 07, 2016 7:56 pm

I had the same problem. Replaced everything but had changed the CDI for one of the red BGM ones. It can't be that so I went stator pickups and coils then complete stator. It would be OK for weeks then blaaa. Swapped the CDI for a Ducatti one on my other bike and it ran perfectly. Unfortunately so did the other bike with the BGM.
So at that point you put it down to bloody Lambretta's till it went on the other bike. It was months later but I ride my series 1 a lot more. At least once it had gone I was actually happy to have a definitive answer. Check your stator readings and do the CDI sooner than later once you have removed your loom green from the CDI.

philz
registered user
Posts: 187
Joined: Sun Dec 08, 2013 12:03 am
ebay user ID: philz1955
Main scooter: Lambretta Li150
Location: South Yorks
Contact:

Fri Apr 08, 2016 5:59 pm

Just had a similar issue would fire but not run. Turned out it was a broken wire behind the rubber cover on the ignition switch. Every days a school day with a Lambretta.

Strummer10
registered user
Posts: 380
Joined: Thu Oct 11, 2012 7:17 pm
Main scooter: Lambretta LI Special 225
Contact:

Fri Apr 08, 2016 9:44 pm

Cheers Guys for all the suggestions....ok we did this today

1/ Used an electrical tester on the indian stator plate and readings seemed ok .....with one wire being within the tolerances Sticky mentions and another at 93 (against Sticky's 95) and another 170 (against Sticky's) 180, but he does say indian readings are lower than Italian so we presumed the stator was ok, albeit readings marginally lower.

then

2/ Swapped the red BGM CDI for a new blue one (Ducati written on it) and cut the lead ends and run it......still cut out after a few miles.

then

3/ Switched the ignition to setting 3 (with lights switched on) and it seemed to run fine, but after 8 miles conked out.

Wondering if it's now the stator is at fault on a coil, like the post above, so borrowed a BGM supercharged stator to try tomorrow and see I guess, but agree it's a pain in the arse lol

then

Post Reply Previous topicNext topic
  • Information
  • Who is online

    Users browsing this forum: No registered users and 3 guests