clearence issues with rear tire input needed

[sitdownsteve]

so i just got my warp9 wheels put some tires on today and was so ready to ride this thing, i got the front on no problem but the back the tire wont even squeeze between the chain guide and rear brake bracket to get half on then if i grind off the chain guide im wondering if it will even fit between the swing arm at the front... im running a 160 tire on a 5in wheel on a 98kx 250 swing arm so i geuss the question is how much can i grind off the swing arm before i ruin it


first pic shows the chain guide bracket i geuss i need to grind off



second pic shows how tight and narrow it gets towards the front and wondering how much of that is safe to grind off