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Your correct with the bevelled edges, all was going well at the engineer shop until they noticed the bevelled edges as they are bevelled at two different ways

zed_thirteen wrote: Sorry to put a bit of a downer on this idea but I think the top and bottom edges of the throttle plates are angled - if you look at the plate from the side you can see its rhomboidal

Shall I make one to prove it can be done with hand tools. You KNOW I'm up for the challenge.

I'm guessing the factory ones are machined out of a piece of round bar 32mm in diameter then parted off the thickness required then dressed on the top and bottom edges to prevent catching on the carb bores.

"Romboidal" WOW BIG word. I had to look this one up 'cause it's not in my vocabulary. Jess!!! I'm almost tempted to pull out one of my brass throttle plates just to measure it. I'm thinking it's slightly oval (by .5mm) and probably rhomboidal on the faces. @#$%3

I had to double check that word as I thought it could be trapezoidal - I knew it was one or the other though

Have you considered checking for feul injection from all sorts of makes as the throttle bodies will have that type of plate and pounds to peanuts there will be a common size with other plates.

I am no mechanic but I study things and learn how shit works and things usally turn out good with some major f@#$% ups as well, but after talking to some guys back here I think they go on the size of the carbs by the width of the butterfly, so this making mine 32mm mikun carbies and if they measured 38mm they would be 38mm mikuns. ( am I getting warm )??
So my question is as I read ChrisG post relating to my theory and that is shouldn't the butterfly's from other 32mm mikun carbs fit my carbs??????????????

Hey Kawaboy don't go pulling your carbs apart, I have no doubt they could be made but you must have a lot more patients than me and many to sit down and replicate them.
One more question relating to the throttle body shaft seals, as they are c shaped dose the channel face inwards or face outwards??

homer01 wrote: One more question relating to the throttle body shaft seals, as they are c shaped dose the channel face inwards or face outwards??

The lips face outwards. The carb is under vacuum, and therefore trying to pull air in through the throttle shaft. With the lips facing outwards, assists sealing the lips to the carb body and the shaft. If the lips faced inwards, the air would get sucked past the lips.