ZX6R running problems

[ride_to_die]

my 02 636 ninja has been cutting out sometimes. Sometimes it starts other times it doesn't. On occasion, when you turn the key nothing happens, no lights, horn or even the needle sweep. When it does start, during riding, the revs drop to about 3k and then the bike cuts out, i've tried gassing it when the revs drop, sometimes it just cuts out other times it comes back to life.

The bike is used all year round. I use Pro FST in every tankful. I've checked the fuses, side stand switch and some connectors. They all seem ok. The battery is regularly plugged into a conditioner and is only 4 months old.

I'm at my wits end as this is the last thing i need this time of year with being skint as it is.

Any ideas/suggestions?

Thanks,
Sam.
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I'm not here for a long time, I'm here for a good time.

[mad4it028]

i once bought a bike sold as spares or repairs with the exact symptoms
for me it turned out to be a loose earth strap
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always looking to buy bikes crashed ,unfinished projects,none runners pm me
currently riding kawasaki z1000 only bike ive ever loved

[Barry_M2]

[ride_to_die]

Thanks for the replys guys, hopefully its something simple. Whereabouts on the bike will the earth strap be?
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I'm not here for a long time, I'm here for a good time.

[Barry_M2]

[c_dug]

Also why the pro FST stuff? Surely it doesn't suffer carb icing since it doesn't have carbs
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[ride_to_die]

The battery terminals are tight. I'll trace the wire from the negative and see if its ok.

c-dug: Its the first 636(A1P) which has carbs
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I'm not here for a long time, I'm here for a good time.