Does HMF use exhaust springs?

[honda92]

i have found a full HMF system for my 400ex cheap, but the guy said the header is connected to the head with springs instead of bolting down a flange. Is this how HMF's are now or is this just a old version? anyone know what the head pipes are made of on these older spring type systems and if the end caps are removable? thanks

[400exrules]

i dont think they use any springs...?

[honda92]

yeah i was a little confused when he said that because i thought they are bolted down, anyone else have any idea?

[hondarider2006]

I only had the slip-on and there wasn't any springs...but the full system could be differnt....As far as I know there shouldn't be any though:confused:

[phildogg]

I also have a s/o but no springs here either.
phil

[cals400ex]

the complete system does use springs.

there are 2 individual little flanges that mount to the head, one in each exhaust port. then the header slides over these pieces and springs hold it in place. you will get a little leak from where the header slides over these pieces but don't worry about it. my buddy had fantastic power gains with his full system over his slip on setup.

[Chino]

Originally posted by cals400ex
the complete system does use springs.

there are 2 individual little flanges that mount to the head, one in each exhaust port. then the header slides over these pieces and springs hold it in place. you will get a little leak from where the header slides over these pieces but don't worry about it. my buddy had fantastic power gains with his full system over his slip on setup.


i just got a brand new full system hmf for a 400ex, no springs are used on this setup, at least on the newer models, i have saw yoshimura use springs in their setup and i belive it was on a z400 or some other bike that cals is talkin about i saw the springs attach to the headers at the motor....

[MadMax27]

No springs on mine. :confused:

[cals400ex]

i guess my buddies is an older model.

[honda92]

thanks for the info guys

[redlineranger]

since were talkin about HMF i wanna tell them how much they blow for making a full system for the 250ex, but not a full for the 300ex...... still a bad pipe though:o

[pitbull43910]

the old ones do use the springs its like the 2strokes i love my hmf

[397ccEX]

no springs

[honda92]

do these older spring models have removable end caps?

[honda92]

also is the header stainless steel?

[4everhonda]

My header is stainless steal, It HAS springs right up by the head where it connects the flanges to the header. I also have a removable end cap!

[honda92]

alright cool. thanks for the info, all is appreciated

[397ccEX]

I received no springs

[honda92]

i'll post a picture of it when i get it