Ok first of all I have to give a great big shout out to BIG DADDY 109 for leading the way!! Ok I tour down my 9 yesterday and today I took all my parts into work to get them moded. I notched out my stock swingarm and mod my fender and I build my side mount lic plate bracket. now you have a 240mm tire and you want to make room for a 300mm that is a 60mm differance and your gonna want some wiggle room as BIG DADDY sayed figured 5mm each side total 70mm split that into half 35mm or convert to inches it is 1 3/8 inch. Now if you measure from your tire to the swing arm on the right side it is right at 1 3/8 so nothing to do to the right side on the shaft side you have to notch out roughly 1/2 inch or so as showen I took some pics to kinda help you out if you are interested!! I will let you know and take pics as everything goes back together right now I`ve got some polishing to do and some painting to do!! PM me if you got a ? have a good one!!