I went ahead & pulled the on-board carbs to remove the 1.6mm air bleed throttle plates and replace them with a spare set of plates with 1.2mm air bleed holes.
None of my go-to sources - Sudco, CPW, Z1, had replacement screws. So I rolled the dice and attempted to reuse the ones in the on-board carbs. No dice. Every stinkin one had to be extracted. No way on this earth were they gonna come out with any screwdriver or bit combo. Not happening. Alden to the rescue again.
Between 2 sets of spare carbs I was able to get the 4 screws necessary to mount the 1.2 air bleed plates. The whole thing took far longer than expected.
A stainless M4 nut served as a thread-chaser for the refurbished screws. I went with blue Loctite for the remount.
While I was in there I did some hand file work to clean up the screw heads and shorten the screw shafts a bit. I also did some light file work on the sharp edges of the plate shaft mounts.
I left the 42 Keihin pilots alone for now. When all was finished it fired right up. With the pilot screws about 1&7/8 out the cruise is still a bit richer than I want, so it looks like the custom Keyster 41 pilot jets are on-deck to replace the 42's. That should do it.
Closing in on the cruise AFR's that I want. That said, if I didn't know what the cruise AFR's were, I'd be very happy with it as is. But I do, & it can be better, & its gonna be so.
I may be the only one who has ever replaced the throttle plates in CVK carbs on a modern Triumph twin. Dunno. But it sure seems that way. I learned alot from this little project.
Closing in on better AFRs with the modified v-stacks.
