ok...wondered if anyone had any advice on the problem i am experiencing with my CBR..

The bike rides fine, however if when i first start it up and ride off..as soon as I hit about 25/30 mph the acceleration dies (almost like a fuelling issue) and then all of a sudden will kick back in at normal speed....then it dies again.....it does this for a couple of mins or so and then the bike is fine to ride.

In addition, the speedo needle drops to 0 at the same time....as soon as the bike kicks back into life the speedo returns to the speed it should be at...

The rest of my dials remain ok...

The bike does ride along when this happens, albeit at a reduced speed....

quite hard to explain online but it seems odd that it doesnt do it all the time, only when he's started up ..

I have tried letting him warm up for quite a bit before i take him out but that doesnt make a huge amount of difference...

HELP!