1984 XT600 with TT600 Camshaft and Cylinder Swap not going well!

[cmattwilliams]

Was wondering if anyone could help me out with a few things...

I have a 1984 XT600 that I am rebuilding...the head and rockerbox are out of a 1984 TT600 (34B stamped all ovcer the place!) that I bought off ebay and it seems the original XT camshaft is too tight in the journals to spin freely when I tighten down the rockerbox to the head!! ....is the TT600 cam a smaller diameter? Could the cam be severely out of round and binding?

the parts numbers are different for the Xt and TT camshafts but I have read that the XT600, TT600 and XT550 cams are all interchangable....not sure if this is so.....

I am about 3 months into this rebuild and this really has me stumped...I would like to find a TT600 cam and have been searching but to no avail....the head is in great condition and so is the rockerbox....if I swap out the XT cam I wonder if the TT cam has the inner spindle for the tach or not?

One other question as well.....I bought a cylinder I believe is from a TT600 as well...it was at 95.5mm and I had it bored to 96mm........I know the TT was a Nikasil plated bore....but was it a cast iron sleeve plated with Nikasil?
This cylinder has the yellowish tinge around the outside bottom of the barrel but it is definitely an iron sleeve....i used a magnet to determine and it sticks....my question is, is this cylinder ok to run now that i have had it bored out because it is a cast iron sleeve or is it , althought iron, a lighter grade and more susceptible to wear?

Thanks very much for any help you can offer....

Matt


Any input on this would be greatly appreciated.....