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Hi! Those GX270's aren't any good, especially with wet clutches. You should send it to me for proper disposal, hahaha

Welcome to the forum! I've used several of your clutches over the years, glad you're here! You got any karts of your own?

Looking good! I'd keep those bits around, if you have anywhere to stash them - never know when they'd come in handy

OK, my next suggestion is to completely cover/plug the carb inlet with your thumb while cranking. If it starts, then the choke function isn't working, which (according to this check sheet) would indicate some dirt in there somewhere.

REading back through, your choke isn't choking like it ought to. Pull the air cleaner clear off and see what it's doing while you crank.

Sounds like the choke isn't closing all the way, might pull the air cleaner off, put the bolts back on the carb, and see what's going on while cranking. Hmmm...when you say you "soaked the carb overnight", did you *completely* disassemble it and blow through *every* tiny little passage? I've...

Mayonaise might make a great engine oil...

I wouldn't worry about the bend, unless it's truly a 90-degree elbow it won't hurt flow - look at car header primary pipes, some of them look like spaghetti. Generally speaking, 4-strokes don't really care that much about the size / shape of their exhausts as 2-strokes do. As long as the pipe...

Welcome to the asylum! We're all nuts around here, hahaha Snowmobile engine / CVT would be a great place to start, imho.

Before you throw money at it, pull the carb off, take it apart, and give it a good cleaning. Odds are there's a tiny bit of trash blocking a passage.

Yeah, looks like you'll need to remove or replace the motor plate.

Yup, you've got something blocking the idle circuit - which can drive you absolutely insane sometimes... Replacement Walbros are out there, but you'll never know what jets are in them, no matter what the descriptions say - which is why I've got a collection of parts for them, lol.

Surging (especially at idle) indicates a lean condition. Does that one have an idle mixture screw, or just an idle speed screw? If it's a Walbro LMK, I've got a bunch of carb bodies, parts, etc for them - yours if you want them, just pay postage.

??? depends on what pulley (if any) is on it.

My ignition died on my 2012 Predator 212cc non-hemi engine, part number 69730. Ordered a new coil assembly from Amazon that specifically said "Fits 69730 and ..." engines. Waited a week for the Prime 2-day shipping (grr) to arrive, and it doesn't bolt up - the holes are too far apart, and too...

Well...looks like the Pirahna engine is going to have to mount with the cylinder to the front, which means that you will NOT want it angled downward (oil control). No idea if the skid plate is strong enough, my bet is it'll be ok but may need some bracing. As far as which sprocket, nobody can...

Welcome! What kart project(s) you looking at?

If it's galvanized (silver colored zinc coating), the fumes from welding are poisonous. Otherwise, the only way I know of is to do a test weld and see.

Glad you found the issue with your engine - now you see the benefit of an actual compression tester (one of the best diagnostic tools, along with a vacuum gauge)

Update: Tried boiling it and another round of cleaning - no joy, so I got a new carb via amazon. It'll run without the choke on now, and the idle mixture screw is awesome, but it's still not making power like it ought to. Taking a deep dive into the ignition is next, i suppose.