also when it bogs down its quite like a miss fire or off a cylinder ??????????? help still needed.

Just a thought..but you could try checking the throttle body are tight against the intake manifold and the jubilee clips are secure.

Does sound like a faulty TPS.

I'll check them, its at its worst when im in 6th and just cruising along about 4000rpm and when i accellerate may it be hard or gentle at 4500rpm it just starts to bog down and vibrate like its of a cylinder and it doesnt want to rev and its very slow to pull out of it until about 5500rpm and then its fine again

Had same on my 996bp turned out to be a faulty TPS as rockhopper sugested

den, was it expensive, easy to fit yourself ? cheers

Dont know how much it was as the dealer had replaced the fuel pump first saying that was the problem so I never got charged for it the pump was around £90 so I would imagine the pot was a lot less!! the dealer set everything up for me

I think a TPS is about £120 ish. Sorry.....

rockhopper, do you know is this a direct replacement part that i can fit myself or does it need to be a dealer job, £120 ouch but if it cures it, its well worth it, cheers

Fitting/adjusting a TPS is not "hard" per se. But it is an almighty fiddle. I've done it on a 2 valver & it does improve running markedly.
Check out the FIM website for instructions.

Robbie