OP
UTC

Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
 
Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
UTC quote
Hi, I have a 1966 Vespa Super with a Bajaj Stator setup. Was out riding a few weeks ago and it was running fine. Stopped for a break then it wouldn't start. No spark and changed a few things roadside but couldn't fix it. Got it home and found a wire on CDI had detached. Re-crimped it back on and then I had a spark but still wouldn't start. I had tried to get Flywheel off before this but couldn't as my flywheel holder and puller were different ( for my 150 GL ) and in jamming a screwdriver into stator hole I damaged a lighting coil. So got a new Flywheel puller from India, I then took flywheel off and found Woodruff key sheared. Ordered a new one ( and new lighting coil ) and fitted them. Now I still have a spark but still it won't start. ( I have changed usual HT, Plug, Cap etc but not CDI or Coil ) Fuel is ok. What I can't fathom is the timing on this as the stator is not movable and Flywheel will only attach where new Woodruff key allows.
@socalguy avatar
UTC

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7155
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7155
Location: So Cal
UTC quote
Welcome to the forum.

The stator is held in place by three screws that, when loosened, should allow it to be moved to adjust timing. Post a pic, let's see what you've got.
OP
UTC

Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
 
Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
UTC quote
Stator Pic
Hi SoCalGuy , thanks for the quick reply. I have attached a pic of the Stator, just to say, I have not removed / adjusted position of it yet, I have only removed the flywheel so far so I shouldn't have affected the timing should I?
Forum member supplied image with no explanatory text
@socalguy avatar
UTC

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7155
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7155
Location: So Cal
UTC quote
Right, removing and replacing the flywheel won't change the timing, but the flywheel has to be positioned on the woodruff to set the timing right.

It's not uncommon for the woodruff to shear. Flywheel nut has to be tightened to ~45 ft lbs or flywheel will spin.

Pic below shows location of screws that loosen stator to adjust timing.

Good luck.
Forum member supplied image with no explanatory text
UTC

Addicted
Old douglas ..smallie with polini 115..super with nasco 177
Joined: UTC
Posts: 683
Location: New Zealand
 
Addicted
Old douglas ..smallie with polini 115..super with nasco 177
Joined: UTC
Posts: 683
Location: New Zealand
UTC quote
Looks like the old green coil lecky nish system from [redacted] that were the first out about 10 years ago..or more...well before the vespatronic etc

The pick up is notorious for failing if any other wire in the system is loose

The pick up just fails all by itself one day

The black box/cdi is also weak and prone to any vibration (how s yours mounted(

The green coil over heats on long hauls ( 2 hour rides) fine around town.
I got to the point where I was carrying a mini soldering iron and all spares and doing road side repair swap outs.....mostly of the pickup

So I went back to points and condenser.

To get your at least running check all connections are super clean (sand paper).....and then check each component with a meter.....eg pick up should be 110 ohms..some eone will have the values of the other parts..or getvserching

If you have spark then its a timing issue.I had to dremmel out the slots to get the right amount of clockwise rotation to get the 18 BTDC I needed for DR 177.......try random settings in the clock wise direction ..as far as it will go

good luck
OP
UTC

Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
 
Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
UTC quote
Update on starting problem
Hi Guys, thanks for the replies. So I found Woodruff key had sheared ( probably as a result of not tightening flywheel enough.) Fitted new woodruff key and bought / used torque wrench to tighten to 45lbs \ ft and tried starting again. Bike started 2nd kick but stopped after around 20 secs. Got it going again after a few kicks but stopped again after around 30 secs. Having a rest \ think for a bit as I need to make \ buy a flywheel holder now.
@rowdyc avatar
UTC

Molto Verboso
GL, PK, PE200 with hack, Sears Rust Badge
Joined: UTC
Posts: 1346
Location: Deep in the heart of Texas
 
Molto Verboso
@rowdyc avatar
GL, PK, PE200 with hack, Sears Rust Badge
Joined: UTC
Posts: 1346
Location: Deep in the heart of Texas
UTC quote
If you don't have a flywheel holder, jam a rope down the spark plug hold to top the crank from turning.
OP
UTC

Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
 
Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
UTC quote
Spark but wont start?
Gents, another update and it's good news I have got it running. All looked ok behind the flywheel but the spark didn't look quite right. Took off the HT lead and trimmed 1cm off the DCI end and re-terminated. Started first kick and ran ok. Big smile on face but it's not finished yet. Lights and cut off switch do not work so looks like the two new coils I fitted are duff / not connected correctly so flywheel will have to come off and I'll have another look. Toying with idea of new Vespatronic ignition kit but at least I can ride it to the garage if required. Lots of lessons learned here by me as I have caused most of my problems by not using correct tools ( ie -screwdriver in Stator ) Thanks for all the tips and ideas, it really does help when you are learning.
⬆️    About 6 months elapsed    ⬇️
OP
UTC

Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
 
Member
1966 Vespa 150 Super
Joined: UTC
Posts: 6
Location: West Yorks
UTC quote
Hi Gents, final update on this problem ( hopefully). I didn't do much on it since the last update but couldn't get the lights working and it would sometimes start and sometimes not, eventually it wouldn't start at all but still had a spark. I ordered a new Stator\ CDI and Ignition coil to try and bottom out the problem. New stator came and didn't fit so had to drill new holes then it didn't fit as it was slightly different size to original one. Removed coils \ pickup etc from old stator, kept the plate and replaced with coils\pickup from new stator. Different connectors and colored wires but changed \ sorted these and fitted it and checked the spark. This looked much brighter than previous spark and started up fine with lights\ horn\ cutoff switch all working fine.
So what started with a breakdown due to broken wire on CDI resulted in me, wrecking the stator. Still it gave me something to do ( left it from about Nov - March due to weather)and I learnt how not to take a Bajaj flywheel off then probably had the flywheel on \ off a couple of dozen times or more since. Now it's running I can't go anywhere but fingers crossed we can all get out on them before summer is over. Keep safe and thanks again for the advice along the way, hope this may help someone in future.
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