i have a nc23 f reg and it seems to be making a whiring/humming noise when accelerating almost like a loud fuel pump but dont think it is that but it is top end,,,and not everytime..anyone got any suggestions would be a big help

not the cams

CMSMJ1 wrote:not the cams

If im reading CMSMJ1 right he is saying, Does it sound like a high speed drill/whistle, similar to this bike?

http://www.youtube.com/watch?v=BtY99chOlco

simular but hard to tell of that video,,,but at the begining then i would say yes

Hi, well if it this sound, best heard on the rideby on that vid it will be the geared cams totally normal and a beutiful sound, but I would get down to your local bike shop, mate or even a bike meet and ask opinions there. You could also stick a vid up on youtube with the sound and post a link here.

yeh take it to a shop sounds like a plan i guess