Maintenance & Technical > KX500 Original

Shortened Silencer

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Motoroost1:
I've got a spare stock silencer for my 2003 K5 , and was putting some thought into cutting 4" off the end , and re tig welding it back together again .  Just curious if anyone has ever done this before and what it did ( if anything ) to the power . When I put a PC R304 shorty on my 2007 KX250 , the engine worked better . Just wondering if the same thing would happen with the K5?
My engine already has an FMF Gnarly woods pipe and a Boyesen Rad valve and is rejetted .

Motorrad:
http://www.kxriders.com/forums/index.php/topic,9171.0.html

Motoroost1:
Thanks for the link . I've cut 4" off the length and tig welded it all back together . Installation will be in the morning and a test ride soon afterwards . It will be interesting to see how it works compared to the full length silencers .

dave916:

--- Quote from: Motoroost1 on April 28, 2012, 03:57:41 PM ---Thanks for the link . I've cut 4" off the length and tig welded it all back together . Installation will be in the morning and a test ride soon afterwards . It will be interesting to see how it works compared to the full length silencers .

--- End quote ---
don't think the kx5 revs high enough for the silencers to have much effect on power, saying that there is alot of differant lenghts for the cr500 claiming to vary the power

Motoroost1:
Did the fabrication work last night and the install this morning . Sounds great and looks good :) Better than stock or either of my FMF full size silencers  ( Power Core and Turbine Core ) . The sound is not really louder , just deeper . It's rained for a week now so I'll have to wait a couple of days for the trails to dry up to see how it's effected the engine performance ( if at all ) .

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