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Re: Breaking up at just over 6000 revs
Posted: Wed Apr 20, 2011 8:57 pm
by storkfoot
Just to update this. Replaced the pick up with a genuine Vespa one tonight. No difference.
I'll give AF a call tomorrow and see if they have heard of this problem on one of their later light flywheels
Re: Breaking up at just over 6000 revs
Posted: Wed Apr 20, 2011 11:10 pm
by wrekkah
By chance do you have an MB digital speedo installed?
Re: Breaking up at just over 6000 revs
Posted: Wed Apr 20, 2011 11:23 pm
by storkfoot
No, mate. Nothing that fancy on my scoot
Re: Breaking up at just over 6000 revs
Posted: Thu Apr 21, 2011 12:48 am
by byron
next thing to try could be another flywheel then...
Re: Breaking up at just over 6000 revs
Posted: Thu Apr 21, 2011 7:35 am
by red ghost
Could be your HT lead or supressor cap, I've had simular problems with cars over the years..
Re: Breaking up at just over 6000 revs
Posted: Thu Apr 21, 2011 12:29 pm
by mickdale
just to confirm its an AF LIGHTENED FLYWHEEL as in new version of the vega flywheel/ducati type - not a SIL flywheel
Re: Breaking up at just over 6000 revs
Posted: Thu Apr 21, 2011 12:34 pm
by storkfoot
Yep, it's definitely the light one.
I should be getting hold of another flywheel over the weekend, so I'll give that a go and see whether that indicates that the problem is flywheel related.
I've spoken to AF who did say this has happened before with their light flywheels and Ducati CDIs which are designed to run on low"ish" revving Vespas. They do an "AFR" CDI which they believe may solve the issue. To be fair to them they did warn me of this when I bought the flywheel 18 months ago. Anyway, I've got one of them on order too.
Thanks again for the ideas
Re: Breaking up at just over 6000 revs
Posted: Thu Apr 21, 2011 12:41 pm
by mickdale
definitly the flywheel - had the exact same problem with mine a few years ago - and was at 6000 rpm aswell
changed allsorts
machined magflange / flywheel etc trying all permutations
read all the forum info - there was a great thread on this i think on the old lcgb site - some guy really looked into it
in the end i put a normal sil flywheel on and voila! - all problems gone, just a load of spare duplicated ignition parts i'd bought
Re: Breaking up at just over 6000 revs
Posted: Thu Apr 21, 2011 1:41 pm
by YAMLAM
mickdale wrote:definitly the flywheel - had the exact same problem with mine a few years ago - and was at 6000 rpm aswell
changed allsorts
machined magflange / flywheel etc trying all permutations
read all the forum info - there was a great thread on this i think on the old lcgb site - some guy really looked into it
in the end i put a normal sil flywheel on and voila! - all problems gone, just a load of spare duplicated ignition parts i'd bought
you should have had it Dyno`d Mick.
Re: Breaking up at just over 6000 revs
Posted: Thu Apr 21, 2011 6:28 pm
by coaster
storkfoot wrote:I've spoken to AF who did say this has happened before with their light flywheels and Ducati CDIs which are designed to run on low"ish" revving Vespas.
Errr....what about T5's, they must rev to 8 or 9k or so surely? The CDI on mine 'looked' exactly the same as any other Ducatti CDI except that it was black
