Going to use it to fit knowck sensor - but if I remove this bolt are there any affect of the engine ?

as far as i can tell from the manual, it,s the camshaft drive bolt, ,so i wouldnt touch it!!!ted

It hold the central cam gear "tower" in place...so don't undo it..

CMSMJ1 wrote:It hold the central cam gear "tower" in place...so don't undo it..

I just like to remove it and replace with longer bolt. Are there any way do this ?

Don't see why not - from knowing the NC30 - it would be no issue if you had to space it out etc.

Don't blame me if it kills your bike though mate! I reckon using a longer bolt, that was exactly measured to account for the spacer, would be OK