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+--- Thread: engine judder at low revs (/showthread.php?tid=59597)
engine judder at low revs - manuel32 - 22-07-12
When cruising around town,20-30 mph open the throttle and pulls then judders, like missfiring pulls more missfires a little bit the goes well, not noticable at higher speeds, shut the throttle at speed and open again its fine.
Its just 20 to 40 mph when opening the throttle a little or alot.
Battery is fully charged, fresh petrol in, shells best.
Anyone any ideas?
Re: engine judder at low revs - tomlinscote - 22-07-12
I had a similar problem a while back ,it turned out to be a damp spark plug, I had washed the bike and not noticed one of the plug caps was not too tight. Once all dried out it was as normal.
Re: engine judder at low revs - ghostbiker - 22-07-12
What gear?
Re: engine judder at low revs - AdieR - 23-07-12
Any particular rev range?
If you take your spark plugs out, they'll tell you a story by their colour; FWIW, it might be worth trying a new set if you haven't already.
Is there a pattern to it (only when cold / hot / wet)?
Does it miss when revved on its stand, or only under load?
Re: engine judder at low revs - manuel32 - 23-07-12
warm engine, any gear, not under strain, just open the throttle and its misses a bit. enough to dip the front forks,noticable up to about 40mph.
does not miss a beat when going well , on the power.higher speed.
Re: engine judder at low revs - Falcon 269 - 23-07-12
On a Gen II, my first thought would be check the coils on each plug. They're known to fail.
Re: engine judder at low revs - manuel32 - 23-07-12
The dealer said he would send a new set of plugs in the post,just have to find out which ones now,, anyone know the correct plugs, 2007-8 fz1 plugs?
Re: engine judder at low revs - AdieR - 24-07-12
From Halfords Website, 2006-on FZ-1 uses NGK plugs CR9EK, if that helps.
Re: engine judder at low revs - manuel32 - 24-07-12
I knew there would be help.thanks matey
