Husky 345e muffler mod

[bikewoo]

Hi, I have a Husky 345e and wish to do a muffler mod, I have looked though threads but can't seen to find instruction / pictures. Even found spuds video on you tube but his comment is open it up 80 percent and retune. Any advise welcome, thanks

[Stubby]

Start by removing the spark arrestor screen if you have not already . Then open the outlet up by the amount spud recommends

[bikewoo]

Spud mentioned brazing on a piece of pipe? Any ideas?

[Stubby]

Spud mentioned brazing on a piece of pipe? Any ideas?

 

Yep . This sorta thing ....

[bikewoo]

What is the porpoise of the pipe?

[spudulike]

Standard exhausts are limited to 114db SPL, this makes them restrictive and stops the full potential of the engine being used.

 

A muffler mod basically consists ofopening up the exhaust outlet and/or drilling/removing the internal baffle plate.

 

Many people have different ways of muffler modding, I usually find a length of suitable steel tube, cut a 1" length off it, open a hole up in the front of the muffler, insert the tube and braze it in place - this at least doubles the outlet cross sectional area - 80% is the figure banded around but in reality, you need the outlet to be free flowing but not stupidly loud.

 

The internal baffles, if fitted, are generally drilled to allow the exhaust to pass through the muffler in a straight line.

 

There are pictures on my "Whats on your bench thread" of many that I have done - you can just cut a big hole in the muffler but personally like the thing to have some engineering and crafting in its design:thumbup:

[bikewoo]

Thanks stubby and spud for your imput. Spud do you braze instead of welding the pipe for any reason other than it looks better. last question, whats the max rpm at full pelt would you say is a good level. thanks again.

[bikewoo]

What would be the top rpm?

[spudulike]

What would be the top rpm?

 

Depends on the colour of your coil, mine was the unlimited black one and just upped the revs to 13,500 and it worked fine - the important thing to ensure is that you get a little fourstroking on the top end and the colour of the plug is tan.

[bikewoo]

Depends on the colour of your coil, mine was the unlimited black one and just upped the revs to 13,500 and it worked fine - the important thing to ensure is that you get a little fourstroking on the top end and the colour of the plug is tan.

 

Thanks spud, what do you mean " colour of the plug is tan"