I haven't stopped by for a while. The coating is Eastwood inside the pipe exhaust paint. I'm hoping it will keep rust at bay for a long time. I'm not a fan of the repro 341's on the K0 and have ordered two sets of Busso no stamp exhausts, one will be for each of the late number K0's I have. (assuming we ever get them) then the 341's will go on my brothers one owner K4.

 Does anyone know when, as far as serial number the lower fork legs went from the Early K0 type with the more ridged top to the K1 type tapered top?  I have both and want it right.

Since this I've added a late K0 in gold to make a set of all three colors.

 I ran into this myself, I have a set of early fork 46mm lowers (ugly as the dirt I found them in) but cleaned up well. Apparently I have no 46mm early fork hardware to assemble them with. Probably another display of my earlier ignorance of what I had. The new plan is to buy new tubes and use cut down 48mm parts to rebuild them.

 Recently Yamiya has not had the red foam or any replacement seats with red foam. Hopefully that will change in the future.

 The comment above led to me buying a gold tank set from a member and  since no number pipes aren't available right now, I got a set of 341's from cmsnl. I'll coat them inside with the Eastwoods coating like I do the no number pipes and this bike may borrow them until PMC or M-TEC repros are available gain. Then they will go on my brothers one owner K4.
  I've concluded they are made when excess production capability is available and Many factories in Asia were closed for an extended time, now they are booming and trying to catch up.

 Thanks, I learned a bit from the other fork post that oz had. There are 4 total K0's in the shop.
   This began when I was working on #3  and I noticed 5511 had stepped forks,  43,000 + had stepped forks, but 14,100 had tapered.  A swap may be appropriate, but  I have an even newer 1971 K0 frame and engine, those tapered forks would be more appropriate on it. That's the transition bike they might have come on.
   I do have a proper set of early fork lowers that are in rough shape, but I've cleaned up worse and have the old rusty top tubes with most of the parts and have a couple more tapered forks just in case I need parts.
   There's a good chance I swapped those forks onto there because it was my first 750 since I was younger and I just wanted it rideable.
 I am hoping to own all three K0 colors, I got a gold tank set from Mark B on here. 

 I was hoping to hear they  found the Honda tooling and these are now just like new oem, or at least much improved since the original posts. 
  I made a 9 bolt clutch cover once, a couple guys wanted one and I got hate mail from others.  It did look and work right and completed an engine that I drove halfway across the country to get other parts for.