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Post by Devo McDuff on Nov 8, 2010 21:39:37 GMT
How do all,
I'm having a spot of trouble with my scoot. It's a 1963 VBB but has had a conversion and has a LML 150 engine. Normally goes pretty well, better than my PX125 did when standard.
Riding it to and from work yesterday it was awful though. It feels very weak and there is little acceleration or revs in any gear, also can't get it to go much beyond 25 mph flat out. It does idle (though not as strong as normally) and it starts alright but something is definitely up.
I will check the plug later (tropical storm yesterday so didn't get a chance!) but what else should I look at first off?
Cheers.
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Post by Devo McDuff on Nov 10, 2010 1:16:07 GMT
Swapped the plug and has made no difference. Old one is pretty black but not wet.
Anyone any ideas? Otherwise it's a trip to the local rip-off merchant scoot shop, the prices are scandalous in these parts.
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Post by scooterwarehouse on Nov 10, 2010 17:56:58 GMT
Have you checked the Exhaust isn't choked up?Try putting your hand to the Tailpipe to check it's blowing through ok.
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Post by Devo McDuff on Nov 11, 2010 13:04:43 GMT
Checked this morning and feels like it's blowing through fine mate.
Took it to the scoot shop and he reckons it's electrical, thinks the "pickup might have gone behind the stator" apparently. Is with him just now so will just see tomorrow.
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Post by bryno on Nov 11, 2010 18:01:07 GMT
if thats it, its a £10 part plus time to remove the flywheel and stator to fit, say an hour labour tops..
LML stator pickups are generally regarded as very good and not known to fail, are a popular fittment to Lambrella electronic set ups...
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Post by bryno on Nov 11, 2010 18:01:57 GMT
if thats it, its a £10 part plus time to remove the flywheel and stator to fit, say an hour labour tops.. LML stator pickups are generally regarded as very good quality, are a popular fitment to Lambrella electronic set ups...
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Post by Rudi on Nov 12, 2010 11:26:34 GMT
what does it mean when the "pickup might have gone behind the stator" ?
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Post by bryno on Nov 12, 2010 17:05:44 GMT
Took that to mean the electronic pick up on the stator plate, simple fix, one screw and one wire to solder, done!
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Post by Devo McDuff on Nov 13, 2010 2:23:52 GMT
I dunno what it meant exactly, I know a bit but not enough to question when I think he is bull-shi*tin' me. I knew there was pickup behind the flywheel so it sounded alright in this case.
He said it was defo the electrics initially but rang yesterday and said it is the exhaust after all (I did mention this to him at the the start based on what Barry had said). Says it's full of crap and needs slinging altogether. That sound right? How did it get that bad in the first place though, it was only restored 18 months ago or so and has done less than 5000KM (of which I've only done a couple of hundred) and was serviced a few weeks back by them. Won't it just happen again with a new exhaust if there's an underlying problem with the setup?
The guy is okay but comes across as very fly and sales orientated, now talking about very expensive sport exhaust options. Might see if I can get a 2nd opinion from a scooter shop a bit further away.
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Post by Rudi on Nov 13, 2010 10:55:31 GMT
exhaust sounds the logic choice although it usually doesn't get clogged overnight but rather decline in performance as time goes by but maybe some "crap" just got loose and winded up at the exhaust exit... although sounds too early if you say its 18 months old..
regarding pickups, as far as I know, they either work or not and your engine is ok, just doesnt rev high so maybe it is the exhaust after all
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Post by bryno on Nov 13, 2010 22:24:59 GMT
I'd be amazed if it's the exhaust unless you have been running it on cheap mineral oil and it has an underlying problem of running way too rich..
Exhausts just don't get clogged and need de-coking like they used to before synthetic based oils and unleaded fuels..
But hey, if a new exhsust does the job, fair enough..
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Post by Devo McDuff on Nov 14, 2010 9:12:19 GMT
Performance loss was not gradual. Flying one day and slow as the next.
Guess I will just have to get the exhaust replaced. Prices quoted briefly are daft though so I might get one imported from Blighty, even with postage I think it would be significantly cheaper.
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Post by Rudi on Nov 14, 2010 11:29:59 GMT
did you try to insert some sort of a long metal rod into the exhaust exit pipe and see if its clogged? if no, maybe you should
some garages use a drill with the same diameter as the end pipe, they insert it in and out and it should clear the exit from carbon and etc you can use a large screwdriver too, if anything is clogging the exit, screwdriver will remove it
that is, if exhaust is the problem and not carb... but worth a try
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Post by joey on Nov 17, 2010 9:12:17 GMT
I wouldn't have thought it'd be the pipe if the performance dropped overnight? Is it a reed motor or standard inlet? Have you checked your plug? If there was a major downpour have you a) sprayed a little WD over the CDI and b) checked your fuel to make sure there's no water in there?
If it does turn out that the pipe is choked if it's in reasonable nick you can decoke it.
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Post by Devo McDuff on Nov 18, 2010 12:58:24 GMT
Think it's just standard mate, LML 150. Had changed the plug and the old one was a bit too dark I think but not that bad and not wet. The downpour was a bit after it first started playing up, not that I'd of thought to check the CDI or petrol anyway, will bear i mind for next time!
I just let him swap the exhaust in the end as it was still in the shop so unless I got it back off him (and pay the bill for so far) I couldn't try anything anyway.
To be fair I'm actually glad of the swap. Only done about 3 miles on the way home but it pulls a lot harder, difference is immense considering it's just the exhaust.
Had a very weird experience though before. When I got home and stopped the scoot I tried to start it up with the electric 4 or 5 times and it didn't even attempt to kick-in and just made a bit of a click/thud with each press. Then about 15 minutes later it was parked outside and started itself up (full on Christine style!) and sounded like the electric start was being pressed as though the presses from earlier had just kicked-in. The clutch is a little bit loose and the vibrations forced it into gear and it stalled, just managed to catch it as it was falling. What was all that about then?! The bloke in the shop said the battery was flat (though, horn, lights and start had been fine last time I had it) so he'd charged it. Starts fine from kick or electric now.
Gonna get the old exhaust off him for a spare and to check it out. I'll try a screwdriver down it. To clean it out do you just soak it in petrol?
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