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Old 01-17-2013, 09:21 AM   #73069
Beastly Adventurer
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Joined: Feb 2006
Oddometer: 2,846
Originally Posted by Anklyne View Post
25,000Km (~15,500 miles). Not sure really. It's had 2 previous owners that I know of and the guy I bought it off said he mainly ended up using it for trips down to the shops (he was in a rural area so it was a decent ride).

Probably is a damn good idea I give the internals a check I guess...
I would pay particularly close attention to:

The float needle's tip: Check with and without magnification for a witness line where it has been contacting the seat. If one is found, the float valve either leaks or will begin leaking soon, causing a high fuel level or overflowing.

The needle seat o-ring: Make sure it fits snugly and is not cracked/hardened/deformed/shrunken/otherwise damaged. If it's not in good shape, it will leak, causing overflowing.

The slide guide: Make sure that the indentations concentric with the bore in the bottom corners adjacent to where the slide bottoms are still .010" (.25mm) deep or more. If they are not, the emulsion tube is at risk for wear. See,,,, and

The slide: Make sure there is no vertical grooving on the downstream side and that the lift hole area has not been increased by drilling. Drilling causes excessive slide guide and slide wear, which in turn accelerates emulsion tube wear. See,,

The emulsion tube: If the outlet has ovaled, the mixture will become overly rich at low rpm at all openings. The wear can sometimes be hard to see, but keep in mind that .0004" (.01mm) of wear will be discernible on the dyno as an approximately 1 percentage point change in CO (i.e. it the CO was 4% before the wear, it would now be 5%). Sometimes spinning the tube between your fingers can help you see the wear, as can inserting something known to be round, however if the slide guide is worn more than .010" (.25mm), you can pretty much be assured that the emulsion tube is worn. See, and

The pilot jet: I recommend replacing it as a matter of course.

The float height: Using a float height setting tool, set it to it to 14.7mm.

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