Where to buy the HMF slip on?
Senior Member
Joined: Dec 2005
Posts: 1,262
From: Just South of the Ocala Nationa Forest
RE: Where to buy the HMF slip on?
Actually, the Quiet Core is free - if you join their website!
Here's how it works, join the HMF Engineering website - have a screenname and ask for a discount.
They give you $20 off on the order of the slip on.
The Quiet Core costs $20. So, in essence, it's free to members of the HMF Engineering forums.
It's a piece of cake to put the quiet core in. Took me all of 3 minutes to figure it out, without reading the directions. Probably would have taken longer if I took the time to read the directions.
You can installed the quiet core with a spark arrestor, or a spark arrestor or leave both out.
Quite flexible.
Perhaps this weekend it's time to do the "Flange Mod" and then "Bolt-R-On!"
Here's how it works, join the HMF Engineering website - have a screenname and ask for a discount.
They give you $20 off on the order of the slip on.
The Quiet Core costs $20. So, in essence, it's free to members of the HMF Engineering forums.
It's a piece of cake to put the quiet core in. Took me all of 3 minutes to figure it out, without reading the directions. Probably would have taken longer if I took the time to read the directions.
You can installed the quiet core with a spark arrestor, or a spark arrestor or leave both out.
Quite flexible.
Perhaps this weekend it's time to do the "Flange Mod" and then "Bolt-R-On!"
Senior Member
Joined: Dec 2005
Posts: 1,262
From: Just South of the Ocala Nationa Forest
RE: Where to buy the HMF slip on?
I know which of these exhaust cannisters looks better. I also know which one weighs less.
Now I need your help, which one do you think flows more air?
Now I need your help, which one do you think flows more air?
Senior Member
1st Gear Member
Joined: Oct 2005
Posts: 570
From: Long Island, New York
RE: Where to buy the HMF slip on?
Marty, it looks great!!![sm=smiley20.gif] I'm very interested in the HMF and I would love to hear how it sounds.. .Is their any way you could post a small video?..... Thanks
Senior Member
Joined: Dec 2005
Posts: 1,262
From: Just South of the Ocala Nationa Forest
RE: Where to buy the HMF slip on?
I will see what I can do.
However, with the quiet core in, it's just right!
Does get just a bit noisy - deep throaty sound - without it. Of course, I'm not into loud exhaust!
However, with the quiet core in, it's just right!
Does get just a bit noisy - deep throaty sound - without it. Of course, I'm not into loud exhaust!
Senior Member
1st Gear Member
Joined: Aug 2006
Posts: 387
From: Republic of Texas
RE: Where to buy the HMF slip on?
Looks nice Marty. I'm following your progress on this project. I'm thinking of going the same route you did. Post some pics when you get that bad boy on the bike.
Willum
TC
Willum
TC
Senior Member
Joined: May 2006
Posts: 226
From:
RE: Where to buy the HMF slip on?
Im getting used to the growl, definatly a change from all the other choked down dual sports I've ridden!
The funny thing is to cover the exhaust while the bike is idling to warm up... I had to cover the entire opening up to make it 'sound' like the stock exhaust! It was definatly NOT flowing...
The funny thing is to cover the exhaust while the bike is idling to warm up... I had to cover the entire opening up to make it 'sound' like the stock exhaust! It was definatly NOT flowing...
Senior Member
Joined: Oct 2006
Posts: 3,106
From: Misawa Japan
1st Gear Member
RE: Where to buy the HMF slip on?
Go back, look at the opening of the stock muffler, compared it with the diameter of the stock headpipe then try to tell us all again where the bike is being "choked."
ORIGINAL: Iowaguy
looks nearly as well built as my BigGun although I don't care for the end tip- it looks too much like the Muzzy which I think is too sportbike exhaust looking. are you going to change out the header pipe? I assume you know that the headpipe is what chokes the 250 and doesn't let it breathe. congrats on the pipe.
looks nearly as well built as my BigGun although I don't care for the end tip- it looks too much like the Muzzy which I think is too sportbike exhaust looking. are you going to change out the header pipe? I assume you know that the headpipe is what chokes the 250 and doesn't let it breathe. congrats on the pipe.
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Posts: n/a
RE: Where to buy the HMF slip on?
ORIGINAL: tremor38
Go back, look at the opening of the stock muffler, compared it with the diameter of the stock headpipe then try to tell us all again where the bike is being "choked."
Go back, look at the opening of the stock muffler, compared it with the diameter of the stock headpipe then try to tell us all again where the bike is being "choked."
ORIGINAL: Iowaguy
looks nearly as well built as my BigGun although I don't care for the end tip- it looks too much like the Muzzy which I think is too sportbike exhaust looking. are you going to change out the header pipe? I assume you know that the headpipe is what chokes the 250 and doesn't let it breathe. congrats on the pipe.
looks nearly as well built as my BigGun although I don't care for the end tip- it looks too much like the Muzzy which I think is too sportbike exhaust looking. are you going to change out the header pipe? I assume you know that the headpipe is what chokes the 250 and doesn't let it breathe. congrats on the pipe.
By now if you have one (one of the FMF or HMF, whatever the brand slip-ons) and got it installed on your bike you're probably feeling all warm and tingly inside about your bike, maybe you've rejetted. But guess what, it still isn't breathing like it should. The oem header pipe isn't a machinists' best work. Take it off, look inside. And as Forrest Gump would say, "That's all I got to say about that".
Senior Member
Joined: Oct 2006
Posts: 3,106
From: Misawa Japan
1st Gear Member
RE: Where to buy the HMF slip on?
ORIGINAL: Iowaguy
tremor- OK, you don't believe me about the header pipe choking the KLX 250/300. That's okay it's your bike. That's the reason why people who own the KLX 300R replace the header pipe and keep the stock muffler (removing the buttplug albeit) because it has been proven to make as much or more power than some slip-ons. Sure the KLX 250S' muffler chokes it also, I never said it didn't. It has a catalytic converter inside for petesake. Sure you need to rip it off your bike asap, but you also need to pitch the header pipe.
By now if you have one (one of the FMF or HMF, whatever the brand slip-ons) and got it installed on your bike you're probably feeling all warm and tingly inside about your bike, maybe you've rejetted. But guess what, it still isn't breathing like it should. The oem header pipe isn't a machinists' best work. Take it off, look inside. And as Forrest Gump would say, "That's all I got to say about that".
ORIGINAL: tremor38
Go back, look at the opening of the stock muffler, compared it with the diameter of the stock headpipe then try to tell us all again where the bike is being "choked."
Go back, look at the opening of the stock muffler, compared it with the diameter of the stock headpipe then try to tell us all again where the bike is being "choked."
ORIGINAL: Iowaguy
looks nearly as well built as my BigGun although I don't care for the end tip- it looks too much like the Muzzy which I think is too sportbike exhaust looking. are you going to change out the header pipe? I assume you know that the headpipe is what chokes the 250 and doesn't let it breathe. congrats on the pipe.
looks nearly as well built as my BigGun although I don't care for the end tip- it looks too much like the Muzzy which I think is too sportbike exhaust looking. are you going to change out the header pipe? I assume you know that the headpipe is what chokes the 250 and doesn't let it breathe. congrats on the pipe.
By now if you have one (one of the FMF or HMF, whatever the brand slip-ons) and got it installed on your bike you're probably feeling all warm and tingly inside about your bike, maybe you've rejetted. But guess what, it still isn't breathing like it should. The oem header pipe isn't a machinists' best work. Take it off, look inside. And as Forrest Gump would say, "That's all I got to say about that".
What I'm saying is backed-up by numbers as well. An independent testing firm in Japan ran before/after tests on a wide variety of slip-ons and full exhaust systems. The average gain from any slip-on was about 2HP. The gains from a wide variety full exhaust sytems were between 2.5 and 3HP. As an example, your BG EvoX yielded just over a 3HP gain...not bad. We're talking rear wheel HP as measured on a dyno. So, I think it's safe to say that, with a decent aftermarket full exhaust, 2/3 of your gain is from the muffler while the remaining 1/3 comes from the headpipe. I think changing the headpipe on the 300R might have a bit more effect because the larger displacement moves more air.
Senior Member
1st Gear Member
Joined: Oct 2005
Posts: 570
From: Long Island, New York
RE: Where to buy the HMF slip on?
ORIGINAL: Marty
I will see what I can do.
However, with the quiet core in, it's just right!
Does get just a bit noisy - deep throaty sound - without it. Of course, I'm not into loud exhaust!
I will see what I can do.
However, with the quiet core in, it's just right!
Does get just a bit noisy - deep throaty sound - without it. Of course, I'm not into loud exhaust!
Thanks Marty, I am not into a loud exhaust either. Just looking for a better sounding exhaust note (not too loud) and a little proformance..[sm=smiley20.gif]