banshee 1 Posted September 21, 2008 Report Share Posted September 21, 2008 i have cpi 350 in frames they dont say spark arresstor anywhere on them i have checked cpi's web site and they dont sell any. is there a universal one that will work. i know its a dumb question but i'm new to this. riding legal that is. Quote Link to comment Share on other sites More sharing options...
STINKYDELUXE Posted September 21, 2008 Report Share Posted September 21, 2008 i dont have any better pics but if you look i have pro curcit silencers on my CPI Inframes. I cut the pipe off the silencer, took it apart, gutted it and then drilled holes in the end piece to match up with the holes in the flange from the CPIs, bolted the end piece on and than put it back together. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted September 22, 2008 Report Share Posted September 22, 2008 I run trinity spark arrestors on my cpi's. I will post some pics when I get home Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted September 22, 2008 Report Share Posted September 22, 2008 Here are my spark arrested CPI Silencers. I bought a set of Trinity's spark arrestors. You will have to work with them to get them to fit up. Issue #1 They slide right in to the cpi silencer body. The center hole in the spark arrestor is to small. Trinity's pipes use a smaller core. Here is what I did. The hole in the spark arrestor is 1" in diameter. It needs to be opeained up to 1 1/8". You really need a drill press for this because the walls get kind of thin. I wouldnt try it with a hand drill. You just drill 1/2 the way through. You dont want to opean it up to 1 1/8" all the way through or the core could slide out. Then you take a 1" drill bit and go all the way through. That way the inside diameter of the spark arrestor base is the same ID as the CPI's core. And it makes a ridge so the core cant slide out. Issue #2 The 3 holes that hold cpi's end cap on doesnt line up with the trinity spark arrestors. The tip wont be mounted straight if you dont make new holes in the silencer body. I cut my silencers down 1.6" so the spark arrestors wont be haning clear out the back. Dont cut the core down until you have the spark arrestor fitted for the core. That way you can measure how long the core needs to be for a tight fit (not to long or to short). If you have any questons just ask josh theshee did the polishing for me too. Before After Quote Link to comment Share on other sites More sharing options...
Ben350 Posted September 22, 2008 Report Share Posted September 22, 2008 you can also buy the Cobra Sparkys, 2.5 inch rounds. They look like crap, but are easy to take on and off if need be. I had a set and drilled them to use the end cap screws to hold them on instead of the cheesy hose clamp they give you Quote Link to comment Share on other sites More sharing options...
desertdeweller Posted September 22, 2008 Report Share Posted September 22, 2008 depending on where you ride theymay not accept the modified ones. some forest areas are very strict on it they may have to be stamped on the body. something you might want to consider. Quote Link to comment Share on other sites More sharing options...
Ben350 Posted September 23, 2008 Report Share Posted September 23, 2008 depending on where you ride theymay not accept the modified ones. some forest areas are very strict on it they may have to be stamped on the body. something you might want to consider. that is definitely something to consider. In MI they will put up a fuss about homemade spark arrestors and sometimes not let them pass. Spark Arrestors from any OEM or aftermarket exhaust company need to be certified by USFS to be 100% official. If you do have that problem, the Cobra Sparkys are certified to be fit onto any pipe, so those would work for you Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.