just wondering if there may be another reason that one clip groove should make such a difference!!, maybe a very worn needle jet [emulsion tube] where the needle runs--& maybe a worn needle too [combo], or idle mixture set way too rich & overlapping further up [as in] richening up on a closed throttle into a corner then having to clear, or needing a leaner cutaway on the slide. Or is it a carb [not sure what type] with big steps for one clip step. Thin a 36 bing [bung] i use has fairly large steps compared to mikuni etc. Sorry, don't mean to try & poke holes in your ideas--just tossing my ideas around [or was that just tossing lol?] Cheers.
Start again, even had a strange problem 20 years ago in bucket racing where [big ports & holes everywhere] & it blubbered uncontrollably just at the point where it got on the power [big power from a 100 lol] was rich symptoms [but wasn't] some smart arse said double up the reads coz they're fluttering at that point in the revs & bugger me 'they were'--absolutely fixed it on the spot. Had an RT2 reed block & cut off housing welded into a mudbug cylinder at a great angle--another failure but went like hell, till it blew!!. Cheers.
