On my mc21 fitted with a tyga 300 kit I am having issues with the front tyre hitting the spark plug cap. Now I don't believe the problem to be solely the centre position of the spark plug on the nsr150 heads as when I bought the bike it had a fairly well destroyed spark plug cap and was still only a standard 250cc back then. However, fitting the 300 kit could not have made things better.

I do not want to go to an (ultra short) RS plug as they are quite expensive and I read they don't last particularly long, especially on a road bike that is not raced. This may be a solution, though, but I wonder why it was hitting originally (as a 250)?

Could the tyre be too high a profile or the springs be sagging to much, for example? (I don't think either of those are reasonable explanations, btw.) The forks are up about 1.5mm in the triple clamps, I could make them flush with the caps though 1.5mm shouldn't make too much difference, right?

Ideas?
_________________
MC21 Honda NSR250. TYGA 300 conversion.


Last edited by anonymous.shyster on Thu Jun 09, 2011 12:58 pm; edited 1 time in total