Harmless induction roar or something more sinister

[FG ONICS]

my engine seems to be making a farting noise constantly even when the clutch & gears are connected up, has only started doing it after the flywheel incident, there are no cracks in the head that i can see its loudest around the air & fuel intake point, i have a video not that is much help but it might be, i have got photo of where the noise is loudest! it moves & pulls fine, as in the 3 wheel video...

here it is running without the music on 3wheels, & yes it did one hell of a back fire lol

Heres the pic of where its coming from


behind the carb & mounting brakcket is where its loudest!

could it be the stock 26cc exhaust doing it? as its like 30.5cc engine

Any help is greatfully appreicated :cup-1:

 

[OuttaLuck]

Hi mate it sounds like a normal 2 stroke to me, but if theres a back fire you may have a air leak some where..... maybe carbie or head gasket!

 

[Bigger the Better]

Honestly not sure what your hearing? Is there any issues with the engine other then the noise?
What exactly is meant by a farting noise?:laugh:

 

[lordraptor1]

sounds like a 2-stroker with a cannister muffler on it to me, however, i would change that intake manifold out for an aluminum one myself like an ada, or a Z-rc

 

[voo2doo]

I've got a few alloy inlets...
J.

 

[FG ONICS]

I've got a few alloy inlets...
J.

rly..

im listening intently

 

[FG ONICS]

oh... so i got my new pipe today put it on, and did something i usaully don't do.. i checked the spark plug whilst idleing & there is grey fluid bubbeling up? WTF?? could this be the fartign noise? it wasnt making any noise tho?

 

[Bigger the Better]

Was it tight? Is the plug washer on the plug? It should not be leaking. Change it and see if it stops.

 

[FG ONICS]

Coughs...
Sorted i had put a bolt longer than the one required so it had pushed the inlet manifold up off the gasket slightly
ive now put the correct bolt in & second hand gasket & it appears to be hunky dory, still farting but nowhere near as much

 

[Bigger the Better]

You should spray some wd40 or carb cleaner around the carb area and make sure its sealed. If there is air being sucked in and out dirt will enter the engine.