I have an EVT exhaust. when running sounds like I have a leakin sound almost. all the gaskets are good. no cracks in exhaust. it doesn't have to true sound of the exhaust

ttt

Just cause a exhaust gasket looks good doesn't mean it's dealing double them up and see if that helps I have to do that with my MM cause the flanges are a lil warped

it doesn't have baffles. it sounds like the noise is coming out one of the heads. I heard my evt and another evt without baffles side by side and can tell mine doesn't have the true sound

Maybe the weld to the flange is broke. The weld is on the inside.

this is 2nd exhaust that did that for me so I'm starting to think its something with the engine rather than the exhaust

Light material with heat. Shut is gonna break

got home an took at look at it the noise sounds like its comin from the engine itself not the exhaust

Pull the cover & check the rockers & push rods. Might just need set valve lash.

that would make it sound different ?

Sorry, just reread, thought you said it was making knocking sound. Nevermind, probably a leaking slip flange.

my previous crossover exhaust that didn't have slip flanges made the same noise

Pull off your exhaust check the welds on the inside the flange of they are craked. Put it back on with double gaskets and see if it continues. Start checking stuff only way you gonna figure it out

new gaskets, no cracks in flanges. still makin same noise

Have you checked your valves. Do you have any mods on your motor

carb an exhaust. do u think that my valves just need to reset ?

Check them for sure and see. I was thinking check your governor block make sure it's still in the right place and didn't move or anything

what could the gov block cause

Your governor shaft could just be doing what it wants

causing the exhaust to sound different ?

crank it up and use ur hand to see if u can feel air coming from somewhere

I'm gettin my valves an what not checked tomorrow

could have a small head gasket leak, is it coming from both sides or just one?

sounds like just one side. there is no oil any where that shows a leak. the valves haven't been checked in a couple hundred hours

Pour just a little Auto Tranny fluid down the carb, itll smoke like a Mofo and you will be able to see any leaks.

Pressure up the cylinder like you are doing a leak down test and see if you have any leaks around the head gaskets just to eliminate that, check valve springs to make sure your didn't break one, that would jack with a valve and make the motor sound weird and run different, make sure all your valve train is still infully intact.

the motor seems to be running fine but I will get all the valves an springs checked out tomorrow

if it wasn't for the shitty air sound coming out my exhaust it would be all good

well at two hundred hours i think u just found a starting point. valves should be cked at every 50 hrs. looks like takem has a new best friend soon to be customer. do a leak down.

do you see any blackness arund the exhaust flanges like on the cylinder head, eliminate the exhaust gasket by changing them and putting 2 of them. Just some pointers, to help you along, casue trust me everyone on this page is gonna wanna know what it is lol

Right on Naggon, always chack valves from time to time, you can ruin a cam quick if one of them is out of wack and it don't take much

yea ill get all that checked tomorrow an get back to y'all. thanks for the help so far fellas

there is black on the heads where u can tell it was leaking. I changed gaskets today to eliminate that

valves reset an it sounds perfect

Amazing what a lil maintenance will do, huh?
Glad you finally got it lined out.

haha yea