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Cathryn
Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
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vegplot
Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd
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Nick
Joined: 02 Nov 2004
Posts: 34535
Location: Hereford
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 Posted: Sun Mar 08, 15 8:04 pm Post subject: |
 
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| Cathryn wrote: |
| Nick wrote: |
Can you advise how to get a quad bike running, please?
I like this online mechanic thing... |
Remember that it hasn't got an automatic choke?
Of course you did, just like Jack did this morning.  |
Nope, it has a manual choke, which I used. It seems to flatten a battery very quickly, despite the battery being a year old, and having had no use.
It almost fires up, but not quite. I've put fresh fuel in, but not a lot. It sparks. Timing chain was an issue, but they fixed that. Could it have slipped? |
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vegplot
Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd
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Nick
Joined: 02 Nov 2004
Posts: 34535
Location: Hereford
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vegplot
Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd
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Nick
Joined: 02 Nov 2004
Posts: 34535
Location: Hereford
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dpack
Joined: 02 Jul 2005
Posts: 46207
Location: yes
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| Posted: Mon Mar 09, 15 1:12 pm Post subject: |
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it might be electrical issues.damp,dirt and ht dont mix well
try spraying all wires,plugs,things connected by wires with wd40,wipe clean and respray,leave it ten mins for the propellant to evaporate (safety first) and then see if drying it has helped.
edit,if it has electronic ignition control i cant help but if it has a mechanical system check the distributor is sparking each cylinder correctly.i assume it has more than one pot ?
if that didnt work it might be control gear issues ,check all cables ,clamps etc are adjusted correctly.try again.
does the magneto/alternator put out a steady voltage when the engine is running ?try not to get zapped by the ht ,it hurts . |
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Cathryn
Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
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vegplot
Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd
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| Posted: Mon Mar 09, 15 2:41 pm Post subject: |
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| Nick wrote: |
It worked, and with a full tank of clean petrol, it's running. There's a turns wheel which adjusts idle speed and I had to play with that a while.
So, I've been up and down the lane for ten minutes or so.
Sometimes, when belting along, the engine just falls to idle speed for a minute, and I can only limp it along in first gear. Then it back fires, and the throttle works again. Did this two or three times in a row, then runs perfectly for another five minutes before I came home.
Any thoughts what might cause a lack of revving? |
Back firing is a sign of poor mixture control. Run the engine hard under load then use the kill switch to cleanly cutoff the engine. Remove the plug and note the colour. Black and sooty it's too rich light grey or white too lean.
Reluctance to come off idle: Assuming it's a carb that uses a float chamber then it could be a sticking float which either causes fuel starvation or flooding. Carb cleaner may cure this as it dissolves petrol deposits that build up over time. Awkwardly it could the float not set at the right level. This involves stripping it down, cleaning carefully, and resetting. Don't advise doing this without a manual and a carb gasket set.
Last edited by vegplot on Mon Mar 09, 15 8:31 pm; edited 1 time in total |
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Nick
Joined: 02 Nov 2004
Posts: 34535
Location: Hereford
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vegplot
Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd
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Cathryn
Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
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Nick
Joined: 02 Nov 2004
Posts: 34535
Location: Hereford
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vegplot
Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd
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