nouseforaname90
07-02-2006, 02:19 PM
Well I figured that most of you have seen the "CFM Performance Exhaust Flanges" on eBay for '85 and newer TRX and ATC 250R's but you didn't know whether it was a good purchase or not. Well.. it is. Here is what I am talking about:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=260001489178&ih=016&sspagename=STRK%3AMEWN%3AIT
I decided that ANYTHING would be better than my old, gooey, leaky (VERY!!) stock flange, so I took a chance and got it. Once I recieved it in the mail, I was like, "What the hell? This tiny thing is $50?". Well today I got around to putting it on my R, and installing it is a snap! My old flange was very loose on the pipe and probably a few mm from fitting properly. Once I put this one on, it sealed VERY tight and now my machine is surprisingly quieter (because there is no gap between the exhaust and the flange for anything to get out), and it is no longer smoking or leaking oil out of around the flange. Here is a comparison for you (the old flange also leaked a bit because the o-ring was dryrotted and I didn't know it, but it wouldn't have even came close to sealing tight even if the o-ring was on there):
http://s2.supload.com/free/100_2404.JPG/view/
There is atleast a 2 or 3 mm difference between the sizes of the flanges.
Now.. onto the test ride.
As soon as I hopped on the bike and got going, I noticed how much quieter it is now because of the awesome seal between the flange and exhaust..=better performance. There isn't really much I can say about the test ride except that this flange is awesome. You don't think that the seal between the flange and exhaust would do much, but it did. If you have an old stock flange and you upgrade to a flange like this, it makes so much difference that you need to rejet. As soon as I put that flange on there, it started breaking up between 1/4 and 1/2 throttle and it felt very weak in power. That means that I need to rejet and jet UP, which means more fuel will be able to go into the cylinder, which means I'm going to be getting more power.
I haven't had the chance to rejet yet, but I'll see what I can do. But if this flange makes so much of a difference that you have to rejet when you install it, I say that is proof enough that it works well. I recommend this flange to anyone with a watercooled R!!
Ben
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=260001489178&ih=016&sspagename=STRK%3AMEWN%3AIT
I decided that ANYTHING would be better than my old, gooey, leaky (VERY!!) stock flange, so I took a chance and got it. Once I recieved it in the mail, I was like, "What the hell? This tiny thing is $50?". Well today I got around to putting it on my R, and installing it is a snap! My old flange was very loose on the pipe and probably a few mm from fitting properly. Once I put this one on, it sealed VERY tight and now my machine is surprisingly quieter (because there is no gap between the exhaust and the flange for anything to get out), and it is no longer smoking or leaking oil out of around the flange. Here is a comparison for you (the old flange also leaked a bit because the o-ring was dryrotted and I didn't know it, but it wouldn't have even came close to sealing tight even if the o-ring was on there):
http://s2.supload.com/free/100_2404.JPG/view/
There is atleast a 2 or 3 mm difference between the sizes of the flanges.
Now.. onto the test ride.
As soon as I hopped on the bike and got going, I noticed how much quieter it is now because of the awesome seal between the flange and exhaust..=better performance. There isn't really much I can say about the test ride except that this flange is awesome. You don't think that the seal between the flange and exhaust would do much, but it did. If you have an old stock flange and you upgrade to a flange like this, it makes so much difference that you need to rejet. As soon as I put that flange on there, it started breaking up between 1/4 and 1/2 throttle and it felt very weak in power. That means that I need to rejet and jet UP, which means more fuel will be able to go into the cylinder, which means I'm going to be getting more power.
I haven't had the chance to rejet yet, but I'll see what I can do. But if this flange makes so much of a difference that you have to rejet when you install it, I say that is proof enough that it works well. I recommend this flange to anyone with a watercooled R!!
Ben