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| wooney |
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 wooney Two Stroke Sniffer
Joined: 27 Oct 2009 Karma :    
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| Teflon-Mike |
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 Teflon-Mike tl;dr

Joined: 01 Jun 2010 Karma :    
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 Posted: 18:34 - 14 May 2011 Post subject: |
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Is it the parallel twin engine, as the earlier CM125, CD125 'Benley' & CB125 Super Dream?
If so it doesn't have a starter clutch as such, it has a sprag clutch or freehwel like a bicicyle, on a chain drive between starter motor and the crank shaft.
It is an awkward one, and I dont know, £250 may not be unreasonable, becouse I dont know how much the freehweel actually is, but its not a huge job. Mag case off, slip the sprokets, pull the generator rotor, slide off the free wheel, replace, put back together. half competent mechanic with the told to remove rotor (think its just a 16mm bolt, actually!) should be able to do it in about an hour.
If its the later V twin, no idea, but would expect it to be pre engaged unit on the end of starter motor, in which case may be five minute job, and £200 replacement starter motor! Or it could be a centrifugal gear cluster in the primary drive, that may be a bit more awkward, but again, not a full strip down job.
£50 diagnostic sounds like standard rate, one hour minimum charge for having a prod and a poke. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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| wooney |
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 wooney Two Stroke Sniffer
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| Teflon-Mike |
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 Teflon-Mike tl;dr

Joined: 01 Jun 2010 Karma :    
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 Posted: 19:36 - 14 May 2011 Post subject: |
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Well, its the Benley motor.
Simple chain drive starter.
Whats it doing when its not starting, they dont tend to brake that easily. They get noisy, sometimes refuse to engage, but they dont often break up. If noisy or dont engage, spraying them with chain lube often frees them up, and they get better with use. Normally sticks on bikes that hav ebeen 'sat'.
Might be worth the £50 prod, but get a Haynes manual and an 8mm spanner its nothing you cant DIY! ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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| wooney |
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 wooney Two Stroke Sniffer
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| Teflon-Mike |
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 Teflon-Mike tl;dr

Joined: 01 Jun 2010 Karma :    
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 Posted: 00:04 - 15 May 2011 Post subject: |
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| wooney wrote: | When it's not starting it just gives the normal chugging noise, nothing too loud. It started again after it went wrong the first time when i didn't use the bike for a few hours.
Cheers, will get the manual and have a look.
Just a though, will the bike still start if i push start it in second gear?
Not practical long term but just wondering. |
You mean on teh starter button it turns the engine over, making the chuf chuff sound of the pistons going up and down, but not actually starting?
If that's the case, NOT the starter motor, its doing exactly what it should, turning engine over.
These motors are battery sensitive, though so if battery not 100% then the starter sucks all the power out of them to turn engine over and doesn't leave enough for the ignition system to make a spark.
Next in the check list, is to pull spark plugs see if you have a spark. And if there is compression on the cylinder, then if the plug is 'wet' fuel getting through.
they tend to be easy starters, but its the simple things tha normally vex them.
Cant really help you diagnose causes though on what info you have offered, but if the engines chuffing over on the starter NOT starter clutch, for sure and definite.
If it was starter clutch, it would either not engage and not turn engine over so you'd just get a whine from electric motor, and and possibly a screach from the freewheel. Or it would screach and engage turning motor over. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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| wooney |
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 wooney Two Stroke Sniffer
Joined: 27 Oct 2009 Karma :    
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 Posted: 09:04 - 15 May 2011 Post subject: |
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Yes that's exactly what it does, i left the keys in the ignition the previous night and switched on, but as it started first time i didn't think that was a problem.
The fact it started after going wrong made me wonder. Not being an expert (can you tell ) i'm just guessing the mechanic knows what he's talking about.
will check the spark plugs. |
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| Teflon-Mike |
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 Teflon-Mike tl;dr

Joined: 01 Jun 2010 Karma :    
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 Posted: 14:25 - 15 May 2011 Post subject: |
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| wooney wrote: | Yes that's exactly what it does, |
What's exactly what it does?
| wooney wrote: | Not being an expert (can you tell  ) i'm just guessing the mechanic knows what he's talking about. |
If he's going by your err... rather ambiguouse descriptions of teh symptoms, with 'indefinite' infinatives, making your descriptions rather vague.... mechainc probably knows what he's talking about rather more than he understands what you are talking about!
sorry, but you are purplexing me here!
| wooney wrote: | i left the keys in the ignition the previous night and switched on, but as it started first time i didn't think that was a problem. The fact it started after going wrong made me wonder.
will check the spark plugs. |
so you left keys in ignition switched on, an d the bike chuffed but didn't fire in the morning? Or it screeched and DID fire?
If it screeached. on the button, whether the bike fired or not, that normally means that the starter freewheel is 'dry' and not latching.
Doesn't always mean it needs replacing, could just need a bit of lube and working to get it loosened off.
if it turned over but didn't fire, having left keys in the ignition, probably a flat battery, needs charging, should be all good.
You only need to start looking at spark plugs if it DID turn over, but didn't start with a good, charged battery...
So... take a breath, and if you need help, think it through and explain what is happening, precisely, and we might be able to offer some suggestions. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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| wooney |
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 wooney Two Stroke Sniffer
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Old Thread Alert!
The last post was made 14 years, 257 days ago. Instead of replying here, would creating a new thread be more useful? |
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