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Torn slide diaphragm

  • Thread starter Thread starter Poopwink
  • Start date Start date
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Poopwink

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I broke into my carbs tonight and ran into a few issues--1st, my '82 450TXZ does not have BS Mikuni carbs...which came as a surprise to me and means I have two carb rebuild kits I can't really use. I lined everything up using Ed Ness' incredibly thorough BS/CV Mikuni carb rebuild guide but I didn't do enough homework.

The next issue is that one of the slide diaphragms has a tiny puncture in it, smaller than the tip of a thumbtack. I tried taking some photos but it's nearly impossible to tell there's anything there. I looked around the forums and found a discussion from 2004 saying new slide diaphragms were upwards of $100...am I just S.O.L. on this one?
 
Try using the right stuff black rtv silicone , smear it lightly over the puncture and let dry a few days before reassembling. I fixed a Kawasaki carb diaphragm this way and it worked fine.
 
You might want to try the Wanted To Buy forum. Lots of guys have spares they will cough up for cheap. I repaired a holed diaphragm using a bicycle tube repair kit. Park sells self adhesive patches that work a treat.
 
efX0QyT.jpg

8DsNkri.jpg


So these are the carbs that were on my bike. In various ways they don't match most of the carb rebuild guides I've consulted (for example, choke plunger & pilot screw in different location/configuration). This rebuild kit I bought from Parts N More also has a different gasket. It doesn't have a flap extending into the center (not sure how crucial that is) but I don't think it will fit around the posts that hold the float in place:
i5Btjem.jpg


Can anyone help shed some light on what these carbs may be? Just a different year and configuration of BS carbs? Any other GS450 owners recognize these? The only thing I can see on 'em is "MIKUNI KOGYO CO.LTD JAPAN."

Thanks...


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