The engine failure was just exactly as you described it, this was roughly around 1993, not sure if the factory was running the high speed circuit that lean back that far, or not.
For sure, the EPA had limiter caps on small 2 stroke equipment dating clear back into the 1980's.
Off topic for Pontiac stuff but useful info. BEFORE I put any new chainsaw, string trimmer, leaf blower, etc into service I remove the factory limiter caps and custom tune them. I also run 40 to 1 premium TCW-3 rated 2 stroke oil with 92-93 octane (instead of 50 to 1).
Have had ZERO issues with any equipment that I own, have sold, or work on here..
Keep in mind here that a LOT of this stuff is showing up now with "fixed jet" carburetors, sealed mixture screws, or screws that require special tools to turn them.
I'd also add that removing limiter caps may void your warranty, so proceed at your own risk, but even with that said if you are buying good equipment it's better to get many years of good service out of it vs "smoking" the P/C after a couple of tanks of fuel......
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73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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