1953 VH stalled and won't start

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ian.scott
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Postby ian.scott » Fri Jan 10, 2014 3:28 pm

Why not send it to a mag specialist who will test it properly before rebuilding it . Then you can be 100% sure its something other than the spark causing the trouble.

Ian

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Re: 1953 VH stalled and won't start

Postby admin » Fri Jan 10, 2014 4:29 pm

Here is my first "mag " experience

started lovely.
lots of miles
idling by traffic lights and it stops
kick, kick, kick, kick .. nothing
push it over and start checking - spark is there but not fantastic
call for help
after 30 mins or so I kick it and it goes.
repeat a couple of times over a number of weeks until I get the message to have the magneto overhauled

Here's my second mag experience:

completely dead at the pub
kick kick kick kick kick kick . nothing
give it some petrol into the plug hole
kick kick .. starts .. so ride home quickly
kick .. start .. at home ... hmm odd
next morning mag seized completely - melted shellac off the windings .. original armature !


I'm with Brenton, if it's not going at all
I'd actually clean the points with a file and then get ALL the muck off them. It doesn't take much.
failing that I'd take off the magneto and empty out the oil. clean the slip ring, tighten the points block (another one that stopped me), check the pickup for worn or destroyed "brush" (been there too) and then reset the gap.

My fave last ditch start for weak spark or problem stuff is to either dump neat petrol or easy start into the plug hole and then put the plug back in. In my experience, if it's going to start it will at least fire once with that mixture, which proves it's alive and probably petrol related.
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Postby MichieldeM » Fri Jan 10, 2014 4:52 pm

Well....

I bought a new Bosch bougie. It started after 2 kicks :)

I have not ridden it yet (it's dark and I don't have a fitting for the head light bulb yet), so I am not sure how it will react under load and at higher rpm's, but it sounds good :)


I will be cleaning the pick up (and the ground). Now I am having doubts again about getting the Mag reconditioned...

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Bob.Murphy
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Postby Bob.Murphy » Fri Jan 10, 2014 5:37 pm

MichieldeM wrote:Well....
Now I am having doubts again about getting the Mag reconditioned...


Where there's life there's hope ;) .

Ride it an see how it goes, but for full peace of mind get the Mag reconditioned at a time that suits.

Once everything has been "Base-lined" it should just need regular maintenance.

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH

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Postby MichieldeM » Sat Jan 11, 2014 10:37 am

I cleaned the bike and I noticed that the shims between the oil lead and the valve covers/head were really thick (2mm). After some measuring I think they really are to thick and have blocked oil flow to the head/cams. I swapped them for thin copper shims.


I started the bike and it was very, very smokey:

http://youtu.be/fL8qxwclljk

(check the last part of the video) I was hoping it was residue in the exhaust from previous start attempts, so I took it for a short ride to get it up to temperature, but the smoking stayed, especially under load.

Am I looking at some more serious damage inside the engine, or could t somehow have wet sumped?

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Postby graham.wade » Sat Jan 11, 2014 11:21 am

In my experience, spark plugs from the major manufacturers are very reliable and failure is usually due to another problem such as magneto, oil burning or incorrect carburation. In this case, plug failure could be due to oil burning! The most likely cause is wet sumping. I would check that oil is returning to the tank. If you drop the sump plate very little oil should come out. If oil isn't returning properly the most likely cause is dirt under the ball bearing on the return side. Clean and retry.
If this only started happening since you changed the rocker feed washers, then perhaps you have a valve guide issue, but they would have to be extremely worn to produce smoke like that.
Graham

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Postby Bob.Murphy » Sat Jan 11, 2014 12:07 pm

You are running the bike on the propstand. When I did that with my '57 VB it would wet sump and pour oil out of the engine breather.

It really has to be upright for it to be a proper test.

However, if it behaves like that when its being ridden then - as stated - check the oil return and the pick-up pipe in the crankcase.

It sounds like a grand old bike ;)

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH

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Re: 1953 VH stalled and won't start

Postby MichieldeM » Mon Jan 13, 2014 6:24 pm

After I opened the inspection cover for the sludge trap a lot of oil came out. It seems that it had wet sumped after all. I took apart the oil pump and cleaned it. It all seems fine now.

Thank you all for the advice!

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Re: 1953 VH stalled and won't start

Postby MichieldeM » Sat Jan 18, 2014 6:03 pm

i cleaned the oil pump and wresteled for a short while with the carburettor and electrics and finally took it for a decent test ride this morning. All went well (though I will try a slightly smaller main jet next).

Let my girlfriend have a go while I tried filming with a quad copter. The wind was really messy, so the image is a bit shacky, but you'll get the point. Fans of vox mechanica (man, does it sound sweet): skip to the second half.

http://youtu.be/diURxMS_uZg

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Steven.Carter
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Postby Steven.Carter » Sat Jan 18, 2014 7:42 pm

I'm thinking how you got the Ariel shots (please forgive the deliberate spelling mistake), then after a little searching on the web
dji-phantom-2-big.jpeg

Fantastic, I want one :D
Steve


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