Maintenance & Technical > KX500 Original
Shortened Silencer
2-Stroke Tom:
I know that Team Green thought shortening the silencer was a good mod. In the link below you can see a picture of Destry Abbott's KX500. You can see how they cut off about 3 inches off of the stock silencer and welded on a Cobra Sparky. They claimed the Sparky had zero effect on power loss, and the stock silencer with 3 inches removed was the best they tested. I also started to throw a bunch of my other pictures of Team Green KX500s onto my photobucket site. Enjoy!
http://s1246.photobucket.com/albums/gg620/rjhansens/?action=view¤t=n9n1.jpg#!oZZ15QQcurrentZZhttp%3A%2F%2Fs1246.photobucket.com%2Falbums%2Fgg620%2Frjhansens%2F%3Faction%3Dview%26current%3DKX500e_mail2.jpg
Motorrad:
The pipe I have off hamels bike. 1. Has a turbine spark arrestor welded on. Not a cobra sparky. Never seen a cobra on a team bike. 2. It's stock length.
Just a FYI of the parts I have in my hands..
--- Quote from: 2-Stroke Tom on May 01, 2012, 01:09:30 PM ---I know that Team Green thought shortening the silencer was a good mod. In the link below you can see a picture of Destry Abbott's KX500. You can see how they cut off about 3 inches off of the stock silencer and welded on a Cobra Sparky. They claimed the Sparky had zero effect on power loss, and the stock silencer with 3 inches removed was the best they tested. I also started to throw a bunch of my other pictures of Team Green KX500s onto my photobucket site. Enjoy!
http://s1246.photobucket.com/albums/gg620/rjhansens/?action=view¤t=n9n1.jpg#!oZZ15QQcurrentZZhttp%3A%2F%2Fs1246.photobucket.com%2Falbums%2Fgg620%2Frjhansens%2F%3Faction%3Dview%26current%3DKX500e_mail2.jpg
--- End quote ---
Motorrad:
Didn't mean that to come off short.. Typing on phone
cobbs:
hpd does have a website hpd inc. But they have changed their inventory a lot they don't sell the silencers I have anymore but they still sell a couple I would take over a fmf or pro circuit but they have to be modified to fit and if I was going to try some thing new I would go CPI , RDZ or FTZ all of those companies are REAL high performance companies with way higher quality, than the generic fmf and pc sorry if any of you guys are fmf or pro circuit fans I just don't like them the pipes aren't too bad but I can't wait to get rid of my fmf gnarly pipe for a cpi cr pipe or rpm pipe then my bike will be complete
Motoroost1:
So , what's the theory behind silencers ? If I compare the standard PC 304 unit on my 2007 KX250 to the PC R-304 race unit , the R-304 is much shorter . So , logically , I would assume that less core size would mean less back pressure and potentially greater flow at high rpm . Right ?
If that's the case , why do most people say that the shorter silencer is stronger in the mid rpm range ? In theory , does this mean that it is actually weaker at higher rpm compared to the longer silencer ?
I hate to sound stunned , but , I am new to 2 strokes and I want to make sense of this as best as I can . If the shorter silencer makes more power , why isn't everyone using it ? In my experiment , the shorter silencer was stronger in the mid range for sure . But , I've only done very limited testing so far under one basic riding condition ( service road ) .
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