FMF vs. LEXX - Kawasaki KLR 650 Forum
Gadgets & Gizmos Discussion on the latest "toys" to enhance the adventure.

 2Likes
  • 1 Post By pdwestman
  • 1 Post By DPelletier
 
LinkBack Thread Tools Display Modes
post #1 of 8 Old 04-25-2018, 11:33 PM Thread Starter
Neutral
 
Join Date: Oct 2017
Location: Virginia
Posts: 6
FMF vs. LEXX

Hey everybody! I have always wanted to get a slip on exhaust for my KLR and I have no clue what to get. I have no clue wether to get the Lexx or the FMF. The Lexx is much cheaper, but is it as good of quality? Is the FMF over 100$ better? Am I buying just a name with FMF? Do they both add power to the bike? Is there a certain FMF exhaust to buy? Is there one louder than the other. I have seriously no clue if anyone can tell... SO you don't have to answer all my questions. I just need to know one thing. FMF or Lexx?
pcampbellb is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 04-26-2018, 09:30 AM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,318
Both of those require periodic Repacking. Eventually the screw or rivet holes will wear out.
Investigate the Leo Vince X3, never needs repacking, because it uses mechanical baffles instead of glass packing.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 84,000+ miles & counting
pdwestman is offline  
post #3 of 8 Old 04-26-2018, 10:19 AM
4th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,261
There are many important things to consider when choosing a silencer for a KLR:

- sound.....the LV X3 and the Lexx with the quiet core are the two quietest that I'm aware of at 94db

- USFS compliance and spark arrestor; in the US or Canada you need a USFS approved spark arrestor to ride in most places - and even if you didn't you should have one to help avoid forest fires.

- weight - usually varies from 5 lbs to 8 lbs vs 11lbs for the stocker. FMF Q4 weighs 5.7 lbs, my LV X3 wieghs 7.7 lbs.

- maintenance - all packing type silencers will require periodic repacking; the only silencers that don't are the LeoVince X3 and the Staintune from Australia.....I don't recommend the Staintune for a variety of reasons but the cost alone is prohibitive for most.

- power; there is a small amount of power to be had with the corresponding jetting and airbox changes but don't expect miracles and most of the "butt dyno" reports are due to noise rather than power. ....you're looking at a 2-3 hp at best.


Of the two you mention; the FMF powercore is too loud, the FMF Q4 is 96db and is on the loud side of acceptable (both for the general public as well as most ORV parks which have a 96db limit). The FMF is an easier install, is very light and has the USFS spark arrestor. The Lexx is cheap, relatively quiet and of the two would be my choice. I have a Q4 on one KLR and a LV X3 on the other.......I far prefer the X3 despite the extra 2 lbs.


2 cents,
Dave
DPelletier is offline  
 
post #4 of 8 Old 04-26-2018, 11:56 AM Thread Starter
Neutral
 
Join Date: Oct 2017
Location: Virginia
Posts: 6
Thanks guys! That's giving me some things to definitely think about! Is it a difficult task to repack an exhaust?

Thanks,
Campbell
pcampbellb is offline  
post #5 of 8 Old 04-26-2018, 01:01 PM
4th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,261
not really as long as you have the tools; drill out the rivits and pop rivit the end cap back in place after repacking. Some use bolts instead which make it a bit easier; use some neverseize or something on the bolts as the heat tends to corrode them.

Dave
DPelletier is offline  
post #6 of 8 Old 04-27-2018, 10:13 AM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,318
Self tapping screws are the Absolute Worst thing to attempt to re-assemble a muffler. They will almost fall-out faster than it took to install them!
Don't even bother trying them, imho.
DPelletier likes this.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 84,000+ miles & counting
pdwestman is offline  
post #7 of 8 Old 04-27-2018, 10:21 AM
4th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,261
Quote:
Originally Posted by pdwestman View Post
Self tapping screws are the Absolute Worst thing to attempt to re-assemble a muffler. They will almost fall-out faster than it took to install them!
Don't even bother trying them, imho.
Agreed; to be clear, when I said "some use bolts" I meant some silencers use bolts/machine screws instead of rivits, not some people replace rivits with sheet metal screws - bad idea!

Cheers,
Dave
pdwestman likes this.
DPelletier is offline  
post #8 of 8 Old 05-02-2018, 05:59 PM
Neutral
 
Join Date: Oct 2014
Location: Eagle, ID
Posts: 8
Save your money and get the Lexx. Repacking is many, many miles away and not worthy of concern. My $0.02

Sent from my Pixel using Tapatalk
tnj4uga is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki KLR 650 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Lexx exhaust DC155 2008+ KLR650 Wrenching & Mod Questions 26 06-09-2016 10:05 AM
'96 w/new FMF Q4 + Farkles !!! RF_R_US 1987 to 2007 Wrenching & Mods 0 03-11-2010 08:25 PM
Anybody got an FMF Q4 ??? RF_R_US 1987 to 2007 Wrenching & Mods 9 03-11-2010 02:54 PM
FMF exhaust Kawi_KLR650 1987 to 2007 Wrenching & Mods 5 04-04-2008 08:31 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome