One cylinder not seeming to heat up as quick as the others...

[Devil]

Have an inline 4 cylinder (its a ZXR250 engine), i notice that when I start the bike from cold, the outmost cylinder on the right side of the bike seems to take a lot longer to heat up than the one on the outmost left.

Would this indicate plug or lead problems? I do have a couple of flat spots, but no other obvious problems.

[Hooks]

Have an inline 4 cylinder (its a ZXR250 engine), i notice that when I start the bike from cold, the outmost cylinder on the right side of the bike seems to take a lot longer to heat up than the one on the outmost left.

Would this indicate plug or lead problems? I do have a couple of flat spots, but no other obvious problems.

I have this problem intermittently and it usually turns out to be an oiled plug. If you leave the bike on the sidestand it can happen more often even. I have taken to using the mainstand all the time and that seems to have solved it. So firstly check the plug, if it's looking OK and not wet and black then you could have a lead problem .... that too is easily fixed once you have got a new one.
Good luck, I hope this helps.

[Bandito]

Yeah sounds like shit NZ fuel to me doing its best to foul a possibly dodgy plug-best place to start anyway

[Devil]

Tar. The bike is always on its sidestand (no centre stand), so its the higher side with the problem. Ill get in there and have a look. Dunno if I have the tools to get the plug out though. hrmph.

[Mongoose]

Tar. The bike is always on its sidestand (no centre stand), so its the higher side with the problem. Ill get in there and have a look. Dunno if I have the tools to get the plug out though. hrmph.

Yeah, I would have thought if it was a problem related to using a side stand it would have been the lowest cylinder that would oil up. Still I vote for a crook plug, NZ fuel stuffs them and no ammount of cleaning will ever make them better. :eek: But what would I know, I only have two.

[F5 Dave]

I would prop the bike up straight after your last ride (against a wall?) & try it the next time you start it. You may find the RHS cylinder carb loses the fuel to the other cylinders & it is nothing more than that. Maybe.

[Racey Rider]

Just a side thought.
Is it possable that the cooling water hits that side clyinder first?

That would make one side slower to warm up while things were getting up to normal running temp.
Fowled plugs may not be the issue. There may be no issue at all. That may just be the way it warms up normaly? :spudwhat:

[Devil]

Just a side thought.
Is it possable that the cooling water hits that side clyinder first?

That would make one side slower to warm up while things were getting up to normal running temp.
Fowled plugs may not be the issue. There may be no issue at all. That may just be the way it warms up normaly? :spudwhat:
That did cross my mind.
Ahh well, ill have a look at making sure everything is clean around the plugs/leads, then have a go at standing it up :)

[AMPS]

Are you talking about that cylinder missing as it warms up or are you saying that it's cooler to the touch?
Lou

[Devil]

Are you talking about that cylinder missing as it warms up or are you saying that it's cooler to the touch?
Lou
Cooler to touch.

[Mongoose]

That did cross my mind.
Ahh well, ill have a look at making sure everything is clean around the plugs/leads, then have a go at standing it up :)

Hot damn, you fellas have water in your bikes!! How un-natural is that?

[AMPS]

Men's bikes are air/oil cooled.
Lou

[Devil]

Men's bikes are air/oil cooled.
Lou
Hah.
:moon: :spudguita

[riffer]

Men's bikes are air/oil cooled.
Lou
Step away from the Harley!!! :2guns:

[Mongoose]

Step away from the Harley!!! :2guns:

Ummmm errr, did he not say "mens bikes"? Where does the Harley fit into that? :moon:

[toads]

I have this problem intermittently and it usually turns out to be an oiled plug. If you leave the bike on the sidestand it can happen more often even. I have taken to using the mainstand all the time and that seems to have solved it. So firstly check the plug, if it's looking OK and not wet and black then you could have a lead problem .... that too is easily fixed once you have got a new one.
Good luck, I hope this helps.

hey thanks for this advice, my son has a honda cbr 250rr and it has had the same problem, despite replacing the plugs and leads etc, he noticed a bolt was missing from the side stand making it lean over more than it should, it doesn't have a centre stand but we will look out for some racing stands for it, cos it obviously will continue to foul the plug. cheers for sharing!!

[FROSTY]

Devil --Im 100% certain your problem is what I told ya. You mite need a new plug cap because the old ones screw mite have broken off
good engleesh aye?
For the record -the plug lead had pulled away inside the plug cap of devils bike so it had to ark about 5mm to run the plug