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Reply to "Chesil Speedster - my planned winter overhaul of '98 build"

Martin, main jets and idle jets are not normally changed during a rebuild. All gaskets, O-rings, float valves, and accelerator pump diaphragms are the usual parts in a rebuild kit.

The only real way to know if your jetting is correct is to read the plugs(which is difficult for the main jets) or to use a wideband O2 sensor to read them real-time.

About 2.5 turns out is a good point for Dellorto idle screws. When the car is running well, if the screws are less than 2 turns out is an indication of too large an idle jet. Conversely if the screws are over 3 turns out, running well, the jets are probably too small.

It is easiest to mount the manifolds and carbs with the engine out, but you gotta do what you gotta do. Definitely grind down that offending red fiberglass, just enough to clear the manifold. Make sure you seal the air leaks in the shroud wherever you find them. I have a 911 shroud in my Spyder. The belt should be available at any auto parts store that is not aircooled-specific. I get mine at a local NAPA store. I'm hoping you have a similar type of store in your country.

You may need to make/modify a screwdriver to make it short enough to get to the screws. It's tight working outboard of the carbs in ALL Speedsters. Some are worse(CMC and Vintage), some are better(Beck).

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