Planet Minis

Mischmasch · 10-26-2009, 12:16 PM

Just wondering if there is any rocket science involved in adding the second pipe to a fmf 4.1 system on a 08x4r, or is it basically just cut, shape and weld the pipe onto the other one.

50-50 · 10-26-2009, 01:19 PM

If you're doing it just for looks that's about all it takes. If you're searching for more power or performance just don't do it!

Mischmasch · 10-26-2009, 10:37 PM

Like I said in other post - its just for looks. Joining the two pipes cant do any harm can it?

kawasakicoby125 · 10-26-2009, 10:38 PM

adding 2 cans will greatly reduce, more than half, the back pressure. so u will lose a lot of power.

tcr0148 · 10-27-2009, 07:41 AM

staggs racing has the bolt on twin can set up.... not my style but you may want to check it out

Mischmasch · 10-27-2009, 10:06 AM

Quote:

Originally Posted by kawasakicoby125

adding 2 cans will greatly reduce, more than half, the back pressure. so u will lose a lot of power.

Is that an educated guess or do you know this from personal experience?

conant19 · 10-27-2009, 10:11 AM

know it from doing it before you have to keep a certin amount or it wont get out of its own way

kawasakicoby125 · 10-27-2009, 05:15 PM

Quote:

Originally Posted by Mischmasch

Is that an educated guess or do you know this from personal experience?

i am becoming very educated in the ways of the exhaust. haha. it just makes sence

chasetheface123 · 10-27-2009, 05:55 PM

Not half of it, but alot of back pressure.

mauromj · 10-28-2009, 09:50 AM

Whats with the crf150's then?

rs-racer · 10-28-2009, 01:32 PM

But i always thought an 4 stroke don't need back pressure?

kawasakicoby125 · 10-28-2009, 05:07 PM

ya they do! if the didnt they would just run no exhaust. the reason the cer250r has 2 is because weight balance, and the pipes on it are very small. and for 2010 they are back to 1 pipe

50-50 · 10-28-2009, 05:20 PM

Quote:

Originally Posted by kawasakicoby125

ya they do! if the didnt they would just run no exhaust. the reason the cer250r has 2 is because weight balance, and the pipes on it are very small. and for 2010 they are back to 1 pipe

Don't believe the "weight balancing" marketing bulls**t! It was purely a gimmick and for looks. If it was so great why did Honda already get rid of the dual exhaust?

You're going to lose a great deal of performance with dual exhaust. You asked and we told you, but you don't seem to believe it.

monaghan · 10-28-2009, 05:25 PM

yeah the weight balance is garbage youve read to many magazines LOL

but for twin pipes you will want to find ones with a small hole in the back, and you will need them shorter than normal.
i'd say fmf powercore 4 scilencers

kawasakicoby125 · 10-28-2009, 05:31 PM

i dont belive it! i ment to put air quotes around it! haha ill never own a honda!

chasetheface123 · 10-28-2009, 05:31 PM

Quote:

Originally Posted by monaghan

yeah the weight balance is garbage youve read to many magazines LOL

but for twin pipes you will want to find ones with a small hole in the back, and you will need them shorter than normal.
i'd say fmf powercore 4 scilencers

Get some 2 stroke shortys off an 85.

10-26-2009, 12:16 PM	#1 (permalink)
Mischmasch 1st Gear Member Join Date: May 2007 Posts: 153	Dual fmf exhaust Just wondering if there is any rocket science involved in adding the second pipe to a fmf 4.1 system on a 08x4r, or is it basically just cut, shape and weld the pipe onto the other one.

10-26-2009, 01:19 PM	#2 (permalink)
50-50 3rd Gear Member Join Date: Aug 2006 Location: PA Posts: 1,846 My Mood:	Re: Dual fmf exhaust If you're doing it just for looks that's about all it takes. If you're searching for more power or performance just don't do it!

10-26-2009, 10:37 PM	#3 (permalink)
Mischmasch 1st Gear Member Join Date: May 2007 Posts: 153	Re: Dual fmf exhaust Like I said in other post - its just for looks. Joining the two pipes cant do any harm can it?

10-26-2009, 10:38 PM	#4 (permalink)
kawasakicoby125 3rd Gear Member Join Date: Jul 2008 Location: Lynnwood, WA Posts: 2,357 My Mood:	Re: Dual fmf exhaust adding 2 cans will greatly reduce, more than half, the back pressure. so u will lose a lot of power.

10-27-2009, 07:41 AM	#5 (permalink)
tcr0148 1st Gear Member Join Date: Jan 2006 Location: Houston, tx lafayette, la every other wknd Posts: 243	Re: Dual fmf exhaust staggs racing has the bolt on twin can set up.... not my style but you may want to check it out

10-27-2009, 10:11 AM	#7 (permalink)
conant19 1st Gear Member Join Date: Nov 2008 Location: Mtv Posts: 171 My Mood:	Re: Dual fmf exhaust know it from doing it before you have to keep a certin amount or it wont get out of its own way

10-27-2009, 05:55 PM	#9 (permalink)
chasetheface123 Chuck Norris for president! Join Date: Nov 2007 Location: Boyne City Michigan Posts: 4,817 My Mood:	Re: Dual fmf exhaust Not half of it, but alot of back pressure.

10-28-2009, 09:50 AM	#10 (permalink)
mauromj PM Newbie Join Date: Apr 2009 Posts: 13 My Mood:	Re: Dual fmf exhaust Whats with the crf150's then?

10-28-2009, 01:32 PM	#11 (permalink)
rs-racer PM Newbie Join Date: May 2009 Location: The Netherlands Posts: 41 My Mood:	Re: Dual fmf exhaust But i always thought an 4 stroke don't need back pressure?

10-28-2009, 05:07 PM	#12 (permalink)
kawasakicoby125 3rd Gear Member Join Date: Jul 2008 Location: Lynnwood, WA Posts: 2,357 My Mood:	Re: Dual fmf exhaust ya they do! if the didnt they would just run no exhaust. the reason the cer250r has 2 is because weight balance, and the pipes on it are very small. and for 2010 they are back to 1 pipe

10-28-2009, 05:25 PM	#14 (permalink)
monaghan 2nd Gear Member Join Date: Dec 2008 Location: Toronto, ON Posts: 967 My Mood:	Re: Dual fmf exhaust yeah the weight balance is garbage youve read to many magazines LOL but for twin pipes you will want to find ones with a small hole in the back, and you will need them shorter than normal. i'd say fmf powercore 4 scilencers

10-28-2009, 05:31 PM	#15 (permalink)
kawasakicoby125 3rd Gear Member Join Date: Jul 2008 Location: Lynnwood, WA Posts: 2,357 My Mood:	Re: Dual fmf exhaust i dont belive it! i ment to put air quotes around it! haha ill never own a honda!

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