I put this is the 400 section but this section might be right for what I need
My 400 takes a couple of seconds to start usually and when the weather is cold say below 5-6c it will take longer, colder and I may have to bump it. Once the engine is warmed up and ridden for 5 minutes or so it likes to drop a cylinder and then easily cuts out if I try letting it idle. If I stop and switch the engine off for a couple of minutes then restart it, it will fire up easily and given a bit of a rev it seems to clear it out? It then runs on 4 cylinders and generally doesn't give me any hassle or odd behavior for the rest of the ride.
Does anyone have any idea what could cause this?
I have changed the spark plugs and it seemed better at the time but the problem is my test day with the bike was a bit warmer so I don't think it would have happened anyway.
Cylinder 3 lead looks like it has a split as it joins the top of the caps, could that have anything to do with it? I've been using plenty of WD40 all over the shop to avoid moisture getting to it.
It will do it on a cold morning but hasn't yet done it on the way home from work, I assume due it the weather being a touch warmer by then.
Can anyone help?
How does the lead join into the cap? As the split I mention might just be the lead coming out? Can I just shove it in or?