Scooterotica

drunkmunkey6969 wrote:It's just been pointed out to me that you are running a variotronic....sorry, I didn't see that.

My suggestion that it's an ignition problem still stands, the method of diagnosis will be slightly different though.

I'd do this:

A) test readings with a multimeter to identify any dud components or shorts.
B) rev it in neutral on the stand....if it's an ignition fault it will 'bounce' instead of 'zing'. By that I mean it will sound like an artificial rev limiter. The engine SHOULD rev out to 9000rpm in neutral with that pipe. If it hits a 'limit' then go to C below.
C) if readings on A) are out of kilter and it 'bounces' on B.......start replacing components.


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After I took stator off and put it back on again it now revs on to over 8000 not far off 9000 on the stand.
Checked all readings and they are good readings (290 on the red) - revs up nicely and with a 'zing'.

Went out for a spin and she hit 70 (was a bit wet to be pushing any harder on my back roads!) runs fantastic but I'm not 100% I am getting the most out of this engine. Spoke to scooter shop near me today and he reckons I should go to 24 degrees timing and come down one tooth on my front sprocket (Cyclone 5 46x19 at the moment)

Also, scooter shop reckon it might have been set up rich/safe and that might account for the drop off in power on my graph?

Tempted to stick a 18 front sprocket on and see what she goes like then

So what was the fix ?
Was your timing too far retarded or have you disturbed something ?

interested to hear your fix.

dave411 wrote:interested to hear your fix.

To be honest I have no idea! All I did was take the stator off - checked it over - put it back on and she revs right through now. I have left the timing as it was as at 23. Revs out on the stand to near 9000 revs.

Maybe a had something trapped or something - who knows

The mystery that is the Lambretta

It'd be interesting to get it re-Dyno'd and see what you've been missing......

Maybe you trapped a stator wire first time round.

Morgan wrote:It'd be interesting to get it re-Dyno'd and see what you've been missing......

That's the plan - Since the last dyno I have changed the gearbox to a 5 speed and yesterday I changed the front sprocket to a 20 tooth - only had a little spin on it but feels much better already, nice to ride