Got a hankerin for a new exhaust. About to go pick up a pair of cbr600rr undertails. Should I try to get creative with an undertail mount or mount one under the bike?

Best part is, picking them up for the high price of $free.99

Well, picked up the exhausts. Bit of a drive, but the price was worth it. Disconnected my V&H at the midpipe. The cbr pipes slip right on. Went to fire it up just to see how it'd sound... and nothing. Spent the last 4 hours tearing the bike apart only to find out that the clutch switch went bad on me. Got the bike up and running but it's too late to see how the exhausts sound. I think between the two of them I'll be able to cut and weld something together that'll fit nicely up under the bike.

send the v and h my way??!! lol

There's a second GS in the garage that'll probably claim it.

Fired the bike up today with the cbr exhaust on it... Sounds nice. Deep grumble like the v&h, but not as loud. Mounting is going to be an adventure.

pics?

Yeah I'd like to see some pictures of how you're hooking these exhausts up. I can't picture something that snakes it's way up under the tail of a cbr fitting the same under the GS. Do you just have them sticking out sideways for sound?

Are they the stock pipes, or aftermarket ones?? I'm pretty curious about this whole situation.

I love bikes that have exhausts under the engine.....

     

in their final position, it'll be something like the buell there.

At the moment, they're just kinda sticking off to the side... I'll try to take some pics/video a bit later

Looks like it may fit somewhat nicely down here. Should tuck up a little bit higher, and will require a decent amount of cutting and welding to make it fit, but where's the fun in off the shelf parts anyway?


Here's a quick little video to get an idea of the different sounds.
http://www.youtube.com/watch?v=cvVOeRYSkSg
There's a bit of exhaust leak going on with the cbr600rr exhaust as it's just slipped on and not clamped down or anything. It doesn't have as much low down grumble as the v&h, but is far more civilized, and has a little more of a mechanical sound to it. I like it. Sadly the video isn't really 100% accurate as to their sounds.

The 600rr pipe doesn't sound as nice as the V&H, but at the same time I have a V&H on my bike and I personally hate it. I think it's way too loud in person, and have no problem with stock exhausts other than how ugly they always are, so tucking one under the engine sounds pretty good to me. You'll want to rejet the bike considering the new exhaust isn't going to let as much air through as the V&H did.

You'll just have to weld the headers together into 1 pipe much earlier, and weld a new tab onto the exhaust so you can bolt it to your frame, and I'd consider cutting and rewelding the tip so the exhaust isn't pointing straight at your back tire, although on the plus side your tire will be fully warmed after about 20 seconds of riding while everyone else will need to get in a full mile or two before they can really start leaning their bike over.

I think the cbr pipe sound better imho  smoother, and far less droning over a long ride

Quote from: jeremy_nash on April 04, 2010, 09:30:32 AM
I think the cbr pipe sound better imho  smoother, and far less droning over a long ride

It is a much smoother, less harsh sound. I wish the video did a better job of capturing it. In person the bike just sounds like it's running better.

Sadly, making it fit is going to involve a bit more than just crossing the pipes over a bit sooner and welding on a new tab. I'm going to have to cut up both exhausts, probably shorten the body a little, and weld it all back together, but I like the look, so it's worth the effort.

Anyone know off hand how hot the outer bodies of mufflers get after constant use?

Are you looking for an actual temperature? or just an idea? I can definitely tell you they get "skin burning" hot, but I don't know what that translates to in fahrenheit or celsius.

Exhaust sound is hard to nail down. Stock exhausts sound smoother, I just don't think they sound quite as much like a motorcycle. I think the way most bikes sound with an aftermarket pipe is awesome, in theory, but in real life I don't want to hear them, so I'm definitely all for stock exhausts. The only thing I really don't like about most stock exhausts is how huge and ugly they are. I know manufactures don't care to make them look nice because they know you're going to replace it, but still, paint it nicely or polish it up and a lot more people would use them. I think undertail and underbelly exhausts are the best things they've come up with for bikes as far as stock exhausts go. If you're just gonna put it on the side of the bike, I'd say credit for the best looking stock exhaust goes to the 03-04 636r. That's an exhaust that I wouldn't even have to think about replacing because it actually looks pretty decent.

Looking for a rough estimate temp wise. Considering putting a layer of basalt or unidirectional carbon fiber on the exhaust after it's all cut and welded to clean up the appearance, but I need to know if the temp it gets to is too high for the epoxy resin I have laying around. Would prefer to not have to swap to a phenolic resin if I can avoid it.