Silencer Packing two strokes VMX

[Bondi Rabbit]

I have a YZ125x and the small silencer never had packing since I owned it in 78. Is it suppose to have it ? Does it work and Does anyone use it on VMX bikes . Saw some on Torpedo which was cheap ?

[Ted]

Yes Yes Yes

[Bondi Rabbit]

Another Stupid question , is there a packing technique or is it self explanatory

[Ted]

www.boykoracing.com

Scroll down to muffler packing

[Nathan S]

125X muffler will need to be cut open to repack. Most people cut at the weld at the back and rewelding once the new packing is in.
I prefer to cut out a rectangle from the side and the pop-rivet a patch over the hole. It looks a bit crap, but makes future repacked very easy, and can actually be repaired very neatly if/when the bike is retired from active duty (and functionality takes a back seat to appearance).

[kim80y]

When doing noise testing earlier this year at QVMX- it was the 125cc class that was the closest to the limits, must be the big revs they pull.
Noise testing became compulsory in June 2013 in the MOMS.

So yes, definitely pack that silencer!!!
Cheers
Kim

[Glen08]

Don't pack it to tight,  I have used roofing bats for years & rap it then wire it in place , insert it back into the stinger by rotating it so as to not disturb the packing,, works "quietly" well for me ;-).

[shelpi]

125X muffler will need to be cut open to repack. Most people cut at the weld at the back and rewelding once the new packing is in.
I prefer to cut out a rectangle from the side and the pop-rivet a patch over the hole. It looks a bit crap, but makes future repacked very easy, and can actually be repaired very neatly if/when the bike is retired from active duty (and functionality takes a back seat to appearance).

yep done the same with me RM B models cut around each end, pull the perforated tube out, pac with ceiling bats as ya sticking the tube in and if ya good at welding you wont even know its been done