Misfiring

[Jonty]

Hi all

Just wondering if anyone can help me on a strange problem that has happened only a couple of time this year (once being this morning). I went to start the steed and gave it full choke and after a bit of coughing it cranked up. Unfortunately, it was only running on three cylinders. I try to warm it up a bit and after about a 30 sec riding down the street there was a muffled backfire and the cyliner kicked back into life and it has been fine ever since. I posted about this a while back when I thought it was temperature related, but now I'm not so sure.

I am thinking dodgy plug or some form of fuel blockage?

Cheers

[MSTRS:Me]

Not fuel....most likely a bad plug

[bert_is_evil]

The same thing happens to my bike when it's been raining heavily, quite often it doesn't come right until I drain the carbs so I assumed it was a bit of moisture getting in there.

[Motu]

Very often the symtom of a head gasket leak or a cracked cyl head - just to chear you up....

[Jonty]

Very often the symtom of a head gasket leak or a cracked cyl head - just to chear you up....

Possibly, however my experience of cracked cylinder heads and leaking head gaskets is that if they occur you really know about it! because it is so intermittent and it happened after the bloody deluge in wellers last week I am leaning toward a bit of moisture. Will keep an eye on it.

Cheers

[Motu]

I just pulled the cracked head off my Pajero - 2 or 3 months ago (I do over 1000km per week,so 10,000 to 20,000km ago) it started up with a cyl out for 30 secs,a couple or more weeks apart....I thought maybe a glowplug.Last week it started steaming at idle,it has never overheated or used water - used by date has passed.Headgaskets leak for a reason,heads can crack because the sun went behind a cloud....or you stood on the neighbours cat's tail.....I don't discount such things because I work with them all day.

[GR81]

fella that owned my bike before me had problems running anything more than 91RON gas in the bike... can only run 91 otherwise it just wont run properly.