TRF Forums

It is currently Tue Oct 16, 2018 7:03 am

All times are UTC [ DST ]




Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 10 posts ] 
Author Message
 Post subject: KTM 450 EXC 2003 Exhaust
PostPosted: Wed Nov 30, 2016 9:58 pm 
Offline
50 cc

Joined: Mon Aug 17, 2009 4:40 pm
Posts: 2
Hi, I am looking to get into green lanning, one thing left to sort is the exhaust, the one on the bike is too loud, I have struggeld to find a standard tail pipe, are there any aftermarket pipes recommended for green laning, perhaps one with a removeable baffle that can be fitted for green lanning?

many thanks

lee


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Wed Nov 30, 2016 10:42 pm 
Offline
650 cc Monster

Joined: Sun Nov 11, 2012 7:31 pm
Posts: 3512
Re-pack the one on it.


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Wed Nov 30, 2016 11:25 pm 
Offline
125cc

Joined: Mon Feb 22, 2016 6:19 pm
Posts: 145
I didn't know they could be too loud


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Thu Dec 01, 2016 12:24 am 
Offline
Moderator
User avatar

Joined: Sat Apr 04, 2009 12:39 am
Posts: 1713
Location: Kent
Has it not got the standard pipe on


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Thu Dec 01, 2016 12:51 am 
Offline
650 cc Monster

Joined: Sun Nov 11, 2012 7:31 pm
Posts: 3512
NML wrote:
I didn't know they could be too loud

EH !?


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Thu Dec 01, 2016 7:11 pm 
Offline
125cc

Joined: Mon Feb 22, 2016 6:19 pm
Posts: 145
What do you mean by EH ?


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Thu Dec 01, 2016 9:56 pm 
Offline
50 cc

Joined: Mon Aug 17, 2009 4:40 pm
Posts: 2
it came with an SX pipe, the EXC should have a baffle/spark arrestor thing, its too asbo at the moment I wouldnt turn up to a green lane event with it as it is.....


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Thu Dec 01, 2016 11:57 pm 
Offline
650 cc Monster

Joined: Sun Nov 11, 2012 7:31 pm
Posts: 3512
NML wrote:
What do you mean by EH ?

As in 'what ?'....(it's too loud)...mankinds oldest deaf gag...


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Fri Dec 02, 2016 11:00 am 
Offline
650 cc Monster
User avatar

Joined: Fri Dec 07, 2012 2:22 pm
Posts: 2439
Location: Romiley
Greetings,

Exhaust noise is created as we know by the speed of the gases exiting from the outlet port of the exhaust system, so if the gases can be slowed down then the noise should reduce accordingly. However this can have a knock on effect to the fueling with consequential loss of torque or power as the slowing down at the exit ripples back to the cylinder head exhaust port and exhaust gas exit swirl velocity.

I don't know your particular bike so I do not know the exhaust which is fitted, however it might be possible to make and slide an extra baffle into the inlet side of the silencer. It might accept some simple stainless steel kitchen scouring pads (non soap type), or braze a few separated washers together to form a tube with say one inch gaps between washers, I think that you might get the idea :lol: All very Heath Robinson I know but that is how my friends and I used to make our own silencers back in the sixties.

If the exhaust exit is too large then engine pick up and low to mid range road speed acceleration might be compromised, it used to be called exhaust 'megaphonisis' and sidecar Manx Norton riders in particular used to cover the exit with their foot (I kid you not) :lol: :lol: :lol:

Perhaps take a look at the videos on this link for some ideas;

https://www.youtube.com/watch?v=RNxKO18I-3I

https://www.youtube.com/watch?v=ld60v79wTDY

Let us know how you get on.

TTFN

Hugh.

_________________
Please note that I am not a National TRF Officer, any views expressed are my own and may not be in accordance with any official policy.


Top
 Profile  
 
 Post subject: Re: KTM 450 EXC 2003 Exhaust
PostPosted: Fri Dec 02, 2016 9:54 pm 
Offline
650 cc Monster

Joined: Fri Apr 03, 2009 3:08 pm
Posts: 4440
Well done for wanting to keep the noise down.

If you can't get a stock silencer can and don't fancy DIY, try an aftermarket FMF Q4.

This is what FMF say about it:

FMF Q4 Slip-On Exhaust

With riding areas threatened more every day, FMF takes seriously the expression ‘less sound equals more ground’ and with the Q4, FMF has designed a slip-on exhaust that leads in high performance quiet technology. Using the best materials, the Q4 uses intricate chambers and baffles to improve flow while still dampening sound. Roost more, ride more and offend less with the FMF Q4!
Developed over years of championship off-road racing
Max Sound output 96dB; most models below 93dB
Constructed from aircraft grade aluminum and high strength stainless steel
Use with stock or FMF header
Removable USFS spark arrestor included
Pounds lighter than stock in many cases
Twin stage core design for lower sound output and extended life of packing material


Top
 Profile  
 
Display posts from previous:  Sort by  
Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 10 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: Google [Bot] and 11 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group. Color scheme by ColorizeIt!