Bike was running fine when i turned it on to reserve it seemed to start to stuggle for power in higher revs any sugestions?

maybe the filter in the tank has got shit trapped around it slowing the flow of petrol at full load?

empty the tank, take the tape out and inspect the filter,

there are also 4 filters in each of the carbs where the float valve is.

its happened to me before when i turned it to reserve it just seemed to start running poor wouldnt rev well at high revs, but before when it was on the on tap it ran fine?

Does it get better if you keep riding it on reserve?

You sure it's not just because the carbs have run out of fuel in the 'on' position? When you turn it to reserve the carbs are virtually dry, it takes some time to get enough fuel through to use full throttle sometimes.

no its the same really maybe a bit better, i but petrol in stright away and still didnt run fine maybe the feul pipe is blocked?

If it changes when on reserve it's usually associated with the pipes in the reserve pipe in the fuel tank, this is the only part of the system that is different for the main and the reserve system.

To get to it you remove the tap from the bottom of the tank, you'll then see how it works and what might be the problem (blockage etc). Upon refitting the tap to the tank it's best to use a new o-ring.

is this a hard job?