Running problems

[Adam]

I broke down today (see my other thread) RAC guy reckons it is the coil pack however the guy that picked me up reckons it's fuel starvation.

The symptoms are:

It starts and idles fine, when on full throttle fine, it started to stutter and cough when I let go and reapplied the throttle and I mean the bike was jerking about but after 2-3 seconds it would be fine again until I released the throttle.

Any ideas?

Biker that picked me up suggested checking the fuel flow from the tank to the injector.

[eastanglianbiker]

check the fuel filter if its got one and also the air filter might be clogged from all the dusty dry weather we have had

[Adam]

Had the air filter off at the side of the road didn't help, fuel filter is first on my list of attack.

[Adam]

Well well well, she's running properly again

Fuel cap overflow was blocked so water was seeping into the fuel tank hence the bogging down etc. Emptied the tank and put some fresh fuel in and she's running fine now.

[Adam]

After removing the fuel cap after some heavy rain.

[Grumpy Old Git]

How is the rain water getting in to the tank?

There is no way it will get in through the cap (if fitted properly).

You need to sort that or it will happen again.

[Adam]

It was collecting in the section around the cap and when I opened it it dribbled in.

[eastanglianbiker]

it would normally get in around the outer ridge of the cap gog and then there is the vent/drain built into the lip of the tank to drain water vent tank and it was that which got blocked

[Grumpy Old Git]

OK - Not something I have ever come across before.