Running issues when warm
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- Posts: 44
- Joined: Fri Aug 10, 2007 2:34 pm
- My Bike: zxr 400 L3
- Location: Selby, North Yorks
Running issues when warm
Ok, here goes.
Recently, bike keeps running rough as soon as it gets warm, almost as if firing on 3 cylinders.
Steps taken to try cure this as below
New plugs - Nice bright spark
Carb off, cleaned, reset
airfilter cleaned
Coil tested
HT Leads replaced
Now, anyone got any ideas? Only seems to be when warm, under about 4k revs. If i let it die, will not start until it cools down, then as if nothing has happened.
Currently got redex in tank as well, to see if that could solve anything, but no joy as yet
Any help appreciated
Regards
Recently, bike keeps running rough as soon as it gets warm, almost as if firing on 3 cylinders.
Steps taken to try cure this as below
New plugs - Nice bright spark
Carb off, cleaned, reset
airfilter cleaned
Coil tested
HT Leads replaced
Now, anyone got any ideas? Only seems to be when warm, under about 4k revs. If i let it die, will not start until it cools down, then as if nothing has happened.
Currently got redex in tank as well, to see if that could solve anything, but no joy as yet
Any help appreciated
Regards
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- zxr400 oc member
- Posts: 3341
- Joined: Sat Jan 08, 2005 10:33 am
- My Bike: tomos moped
- Location: Carrickfergus Northern Ireland
Re: Running issues when warm
To be honest that could be almost anything.............................
I had something similiar and it turned out to be the wires from the ignition pick up breaking down.................the insulation had become hard and brittle and the wire was partially broken. But it only caused a problem when it was warm/hot.
I had something similiar and it turned out to be the wires from the ignition pick up breaking down.................the insulation had become hard and brittle and the wire was partially broken. But it only caused a problem when it was warm/hot.
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- Posts: 44
- Joined: Fri Aug 10, 2007 2:34 pm
- My Bike: zxr 400 L3
- Location: Selby, North Yorks
Re: Running issues when warm
Tried all the electrics i forgot to mention, also removed the plug (and put it back) to remove water from airfilter box
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- zxr400 oc member
- Posts: 3341
- Joined: Sat Jan 08, 2005 10:33 am
- My Bike: tomos moped
- Location: Carrickfergus Northern Ireland
Re: Running issues when warm
The broken wire I mention was inside the cover.........it wasn't imediately obvious
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- Posts: 44
- Joined: Fri Aug 10, 2007 2:34 pm
- My Bike: zxr 400 L3
- Location: Selby, North Yorks
Re: Running issues when warm
Ok, will check that one then
Anyone anymore ideas?
Anyone anymore ideas?
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- Posts: 44
- Joined: Fri Aug 10, 2007 2:34 pm
- My Bike: zxr 400 L3
- Location: Selby, North Yorks
Re: Running issues when warm
Any ideas guys?
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- CBT slow
- Posts: 734
- Joined: Mon Oct 06, 2008 5:41 pm
- My Bike: zxr400 H2
- Location: essex
Re: Running issues when warm
choke sticking? dodgy coils? just one of them things where you will have to just try and test one thing at a time till the prob is cured
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- Posts: 44
- Joined: Fri Aug 10, 2007 2:34 pm
- My Bike: zxr 400 L3
- Location: Selby, North Yorks
Re: Running issues when warm
Borrwed my mates bike now, so decieded on some TLC, head off, shimming, cam chain job lot, also going to carbtune it, anyone any experiance with the Gunson carbtune?
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- zxr400 oc member
- Posts: 2320
- Joined: Tue Oct 10, 2006 12:32 am
- My Bike: ZXR400-M4, ZX4, ZX6R.
- Location: Herefordshire
Re: Running issues when warm
sounds like tight valve clearances tbh ..
do you mean "morgan carbtune" or "gunson colourtune" ?
the carbtune is ok, colourtune isnt much cop imho
do you mean "morgan carbtune" or "gunson colourtune" ?
the carbtune is ok, colourtune isnt much cop imho
- extonyg
- zxr400 oc member
- Posts: 405
- Joined: Tue May 12, 2009 9:40 pm
- My Bike: zxr 400 L1 uk
- Location: Portsmouth
Re: Running issues when warm
ye i would agree with zimm as i had this on my bike and because it was left too long it damaged a couple of rocker arms so i had to replace them so i would get checking those valve clearances but a engine rebuild is a good idea with new cam chain etc
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- Posts: 44
- Joined: Fri Aug 10, 2007 2:34 pm
- My Bike: zxr 400 L3
- Location: Selby, North Yorks
Re: Running issues when warm
Mean both, am going to balance and check mixture while i at it, carbtune for mixture got to be better than the try and see method??
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- zxr400 oc member
- Posts: 2320
- Joined: Tue Oct 10, 2006 12:32 am
- My Bike: ZXR400-M4, ZX4, ZX6R.
- Location: Herefordshire
Re: Running issues when warm
carbtune is for balancing .. set the mixture by engine response