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914World.com _ 914World Garage _ Weber IDF Rebuild

Posted by: pilothyer Oct 13 2009, 06:49 PM

I have not been able to find any information in any Weber IDF rebuild article that goes into this area.......Has anyone done this that could help me out with a little information or maybe a link to a rebuild article that covers this with some detail? When I removed the spindle and the bearings I noticed a difference in the parts between the two carbs, namely the flat brass pieces that go on either side of the bearings......Thanks in advance for any help.....Jerry

Posted by: neil30076 Oct 13 2009, 07:27 PM

The diagram at the end of this link may help you -
http://www.rescue912.com/spider/WeberIDF_Setup/

Posted by: pilothyer Oct 13 2009, 09:06 PM

Hey, Thanks but that exploded view doesn't show the pieces I am trying to figure out....Jerry

Posted by: McMark Oct 14 2009, 01:13 AM

I tried replacing throttle shaft bushings on a single throat carb (not an IDF) and learned one thing from that experience: it's not a job for most home mechanics. My test run was on a garbage carb, and I don't think I made anything any better after futzing with it for a couple hours.

Posted by: DBCooper Oct 14 2009, 07:38 AM

I've destroyed a few myself over the years, it was always hit or miss. The dismantling was hard, reassembly a lot more difficult and critical. Last two times I sent Dellortos with frozen shafts to Art Thraen in Utah. Beautiful work, about $70-75 each if I remember right, and I think they came back actually better than new. http://www.aircooledengineering.com Recommended.

For a good book try the CB Performance Weber book (http://www.cbperformance.com/catalog.asp?ProductID=4) which has exploded diagrams and most any other info you'd want. At $12.95 it's a steal. Or their parts at http://www.cbperformance.com/category.asp?categoryid=6 I think Redline has diagrams online too (http://www.redlineweber.com/html/Tech/Table_of_contents.htm), as does Pierce Manifolds (http://www.piercemanifolds.com/) Love those Pierce guys, they're really great.

Posted by: Gint Oct 14 2009, 08:16 AM

I messed with a pair of carb throttle shafts and had the same results. In my case they were triples, but the experience applies equally to IDFs. I won't do it again. And I've heard nothing but good things about Art Thraen myself. If I were working on IDFs that's where they would go.

Posted by: pilothyer Oct 14 2009, 11:58 AM

Thanks one and all for your input......actually the disassembly and reassembly is not the problem (I will admit removing the accelerator pump cam roll pin took some finesse) but I have found a difference in the number of spacers on each side of the bearings in one carburetor when compared to the other one. I have looked at several exploded views but none seem to show much detail in that area...maybe the good Art Thraen could help me with a little "tech support"......Again Thanks. Jerry