www.zxrworld.co.uk

Hi Guys,

I have a problem similar with a recent post I saw.

Basically when I start my bike cold, the engine is misfiring. However as soon as I rev above 4000 RPM the 4th cylinder cuts in and then runs fine onwards from there

Any ideas?

4k is the transition onto the needle jet...i would guess at a blocked pilot jet on #4 carb.

Take a look at the plug. Could be a blocked jet or just the plug needs a clean and gap resetting. May even need to replace it.

Also give the ht lead the once over.

Cheers for the help guys, I haven't cleaned the carbs since getting it yet, so i'll be sure to do that!

Also the plugs are due for a change so i'll swap and torque those up!