Loss of power, compression loss or carb?

[CROSSBOLT]

I had to do that to a SAAB GT750 three-cylinder car! Front muffler/resonator/whatever  coked up badly. Was told to build a roaring campfire and throw the thing in there for an hour or three! The rear sho nuf real muffler had been replaced so was clear. Got done roasting marshmallows and what ever, dug it out the next morning, cleaned her up and reinstalled. Wonderful! Worked like a champ!

[eamartin]

Yes.  The 2-stroke moped guys swear by the "throw it in the bonfire" technique.

[TBR125]

I continue to learn. Thanks.

[robmsz]

Okay, threw in in a fire TWICE and will run normally until it warm up. As soon as it warms up it bogs, will run at idle all day but as soon as throttle is applied BAAAWWWWAAA. Fire it again or what? Any ideas out there? I could drill holes in it but that would defeat the “muffler” besides leaving me with a holy (sic) muffler 🤣. I look for a new one (which I’m not convinced is the problem....$150. Has anyone upgraded to a performance muffler and maybe have a original muffler getting kicked around and in the way willing to sell cheap?

[robmsz]

I’m gonna break down and order another head. Thinking about a 70cc size. I’m thinking at the very least my rings have worn from the back pressure of the VERY restricted exhaust. It runs ok until it warms up them it will bog under throttle. Any ideas what it could be?

I’ll move onto head recommendations in future posts.

[Jonka]

I had same problem or similar  with my 2000 zx50 superfever from cold could get half a mile before loss of power still ran at tick over but wouldn't pull away let it cool and same again. Then by chance discovered if I pulled the brake as I was pulling away it didn't bog down, that led me to putting lights on and it ran.  electrical problem r a nightmare so started replacing cheapest parts first, spark plug and coil first then voltage regulator rectifier and then cdi box but as I was installing the cdi I noticed a corroded wire coming from the stator it was down to 3 strands, cut the bad bit out joined the wire . Runs perfect now only problem I think I wasted my money on the parts and I should of peeled the tape bundling cables together to inspect properly the first time. Hope it's helpful