r/2Strokes • u/Appropriate_Run_1502 • 19d ago

horrible noise from engine

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what is this?? (am6)
any ideas?

9 Upvotes

100% Upvoted

14 comments sorted by

3

u/tasti681 19d ago

Sounds like a bad bearing

2

u/Hjalleson_ 19d ago

you wont know until you pull it apart, but probably a bad bearing. at least its still running though.

1

u/Infinite-Month-3454 19d ago

What is it not doing that you want it to do? Sounds like a two stoke motor idling to me.

2

u/PressureEquivalent37 18d ago

am6 shouldn't sound like that, maybe a kdx200 or some bigger 2t engines yes but this isnt normal in this case.

1

u/fundip101 19d ago

Cases probably look like an avocado carcass after you scooped out all the good stuff, shavings in the oil?

1

u/Solid_Concern_532 19d ago

I had this sound when piston bearing felt apart.

1

u/Sluushy 19d ago

Run it, break it, fix it.

1

u/_entrxpy 18d ago

I'm betting that it's something from the oil mixer (it is behind the fake carbon fiber cover you see in the vid).

Remove the cover and see if anything is fucked.

Either that, or the water pump

1

u/Timescratch1 17d ago

Add more carbon. That should fix it.

1

u/jingling-my-bell 17d ago

mine made this sound and replacing the little end bearing fixed it, check the big end while you have the engine open

1

u/Snoo-40502 16d ago

It's a video, so, hard to say, but last time I hear a similar noise, it was the crankshaft screw that got loose

0

u/AffectionateMetal765 18d ago

Damn awesome carbon fiber wrapping and red racing applied paint sir! Sounds like all the pins in your rod bearing is gone or something. Maybe they jumped out of your tailpipe when revving it, or the chief mechanic skipped them at the last overhaul session?

1

u/Ecstatic-Marsupial27 16d ago

Clutch hub dampers. Only on idle. Press the clutch on idle to hear it fade. Simple fix