pipe is sorted, i had a new kx manifold made and welded on to the cr 500 pipe. i used the stock 250 silencer but changed all the internals to larger 32mm (1 1/4" ) tube and fabed a new stinger to go with it. for the less experiened guys, the photo shows a test i did after the pipe was complete and fitted, it is to check that when the front forks are fully compressed the the front wheel does not hit the pipe if this were to happen when the bike was in use it would cause the front wheel to lock and it would hurt, this test is a must when building the type of bikes we build on this site.