HMF shorty

[exrider272]

well my hmf needed repacked so i figured when i had it all apart i would cut it down.. so tell me what u think of it.

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very intersesting and it came out really great! how does it compare performance/sound wise to the regular size?

[my88r]

that looks very good.:)

[exrider272]

umm it seemed to give it alittle more bottem end and sound wise it gave it a deeper sound over regular size.

[Pipeless416]

Originally posted by exrider272
umm it seemed to give it alittle more bottem end and sound wise it gave it a deeper sound over regular size.

thats opposite of what it should do.

[my88r]

the shorty i had helped with topend. but i only used it for one lap.

[yfzrider310]

looks good!

[400ex28]

It will give it just a little more bottom end but not a huge difference, and more noise ofcouse.

[hornetgod13]

How long had you ran your HMF before you repacked it? Do you just drill out the rivets on the end cap or do you have to pull both ends to repack it?

[hornetgod13]

I searched around and found this on HMF's website. It was very helpful in answering my questions.

http://hmfengineering.com/forums/showthread.php?t=2008

[tanner 222]

awesome job on it. looks clean too. you'd think it came from the factory like that.

[XXXRACER165]

I did that on my E-series full system, and is awsome!

[tanner 222]

wow that looks awesome too. how do you get it to look so clean.

[exrider272]

its really not that hard it only took me alittle over an hour. i just drilled all the rivits then slid the inter peace out. then i cut the pipe the size i wanted + i had to cut the inter peace witch was the hardest of it all. then wraped the packin around it and tied it down. slid it back in and and put new rivits in. but i did clean it real good before i put it everything back on

[hornetgod13]

Where did you buy the silencer packing? HMF recommends a packing pillow.

[exrider272]

i just went to my local dealer and got fmf 4-stroke packing. some people say u need to use different kinds but really packings packing as long as its 4 stroke and not 2- stroke witch it should say on the bag.

[yfzrider310]

yea packing shouldnt matter its all the same stuff as long as its made for a 4-stroke

[XXXRACER165]

Originally posted by tanner 222
wow that looks awesome too. how do you get it to look so clean.


A little Scotchbrite and fine grit wet sanding.

[tanner 222]

but it looks like the factory made it. like ive seen shortys made by people and they have like marks in them and scratches from where they cut it and re riveted it but i guess they just arent as good as you guys are at it :p