V50 starting probs. |
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Evanton
Falcone Joined: 18 May 2020 Location: Scotland Status: Offline Points: 11 |
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Posted: 26 May 2020 at 21:23 |
hi folks, I'm reviving a V50 Mk11 that's been dormant for many years. Its all original Inc coils, plugs(possibly) caps and leads. Carb seals were done by former owner. New battery and fresh fuel. Am I expecting too much? It starts but then stops and won't re-start. Spark looks weak to me. Do I need to refresh the ignition system?
Also the clutch is seized. I've read about the white spirit trick but just how much to put in.. egg cup, coffee mug? Thanks.
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Motty
Senior Member Joined: 03 Jun 2015 Location: South England Status: Offline Points: 269 |
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How long does it run for? I would be taking the carburettors off and giving them a good buff up, paying particular attention to the jets and other orifices |
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It’s more fun to try to ride a slow bike fast .....
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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White spirit trick, a litre. But if the plate has rusted onto the flywheel, it might not help.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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David_M
Falcone Joined: 19 May 2018 Location: Daventry Status: Offline Points: 83 |
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I had a rusted on clutch plate problem after my V50 had to stand outside under a cover for some months due to my inability to ride it after a medical problem. I removed the rubber plug which allows access to the timing marks and rotated the crank until I could see the clutch plate through a convenient hole in the pressed steel cover. I pulled in the clutch lever to back off the pressure plate and held it in position with a cable tie. I slid a sharp chisel in against the face of the flywheel and gave it a gentle tap with the flat of my hand. The plate snapped off the flywheel. I have ridden many miles since with no ill effects.
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David_M
LM V, V50 iii |
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Evanton
Falcone Joined: 18 May 2020 Location: Scotland Status: Offline Points: 11 |
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This worked a treat. I used a sharpened screwdriver.
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Evanton
Falcone Joined: 18 May 2020 Location: Scotland Status: Offline Points: 11 |
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I thought I'd better check the air filter to make sure there were no mousies nests. All seemed ok and while I had the whole thing out I lifted the battery tray and dealt with that. A coat of Kurust then Hammerite. Refitting the air box, a right fiddle. I washed the filter in white spirit as it was pretty clean. Noticed one of the choke pumps had no cable clearance so dealt with that so hopefully it will start and then start again. That was the problem. It would start, then not re-start.
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Evanton
Falcone Joined: 18 May 2020 Location: Scotland Status: Offline Points: 11 |
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Now this morning it won't start at all. Spark ok, plugs not filthy or wet. The odd chuff or pop if I open the throttle a bit. Now the battery is on charge. Its on the naughty step.
Has to be carbs?
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Are you certain the air filter had dried completely before refitting?
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Brian.
Better 5 minutes late in this world than years early in the next. |
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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If you haven't taken them off yet I would, as you suggest, have a look in the carbs.. You may or may not need to invest in gasket sets. I did and only actually needed a couple of small "O" rings from them so far..
I was very rude about the VHBZ carbs when I first had my V35II but I've since (with good advice from here) been through them. A quick 5 miles test run the other day had the plugs looking a half decent colour for the first time in my ownership.. A good clean would be a good starting point, they look a bit odd but are pretty easy to take apart.. Cheers, Adrian Bristol UK |
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Evanton
Falcone Joined: 18 May 2020 Location: Scotland Status: Offline Points: 11 |
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I've had the battery on charge all day and she started just now. And re-started. So I guess the battery has to be tip top. Its brand new. That or the white spirit in th air filter dried out! Might go for a test ride after supper. It'll be the first time. Fingers crossed.
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Richard Hyatt
Senior Member Joined: 14 Oct 2019 Location: Dorset Status: Offline Points: 1097 |
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Like a lot of electronic ignition bikes and cars , there has to be a decent voltage during cranking available to the ignition modules for them to work.
Usually above 10.5v but sometimes nearer 11v.
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Evanton
Falcone Joined: 18 May 2020 Location: Scotland Status: Offline Points: 11 |
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That's very useful info. Its still got the original everything, coils, plugs, cable caps and all other electrics. I'd like to keep it that way but if any recommendations for improvements in voltage transmission I'd be grateful. I've cleaned the Earth and put Vaseline on it.
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Richard Hyatt
Senior Member Joined: 14 Oct 2019 Location: Dorset Status: Offline Points: 1097 |
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Just check the charging voltage at the battery , around 14.2 is a good figure.
That way you know when you're riding the battery is kept healthy. You've done the earth so good move.
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