Pipe for a 636?

[crash harry]

OK, next question if anyone's still reading...

All the aftermarket pipes eliminate the "Exhaust Device" (aka EXUP valve if you're talking Yamaha speak). Can anyone who has an aftermarket exhaust on one of these tell me what happened to your low-end torque?
I'm using it as a commuter so if there's any loss of bottom end, I'm tempted to just leave it the hell alone

[Joe Blogs]

Hey,

My one had a funny little thing under the seat that used to move back and forwards as you reved the bike, I am guessing it was there to replace the valve thing in the exhaust, maybe the engine doesnt like not having it??? May pay to look into that.

Also I would be looking at a PC or a tune boy, as if its running lean, which it probably would do, it'l reduce the life of the motor drastically.

Please feel free to correct me if I'm wrong, I am not a mechanic but I have spent quite some time around bikes, and my mate owns on of our local dyno shops and he pass's on feed back. I can talk to him about it for you if you get stuck and see what he thinks or can find out.

Cheers
JB

[SPP]

OK, next question if anyone's still reading...

All the aftermarket pipes eliminate the "Exhaust Device" (aka EXUP valve if you're talking Yamaha speak). Can anyone who has an aftermarket exhaust on one of these tell me what happened to your low-end torque?
I'm using it as a commuter so if there's any loss of bottom end, I'm tempted to just leave it the hell alone

Take a look at the yoshi dyno charts. No loss for the 636. On mine (CBR) the chart shows a dip at ~6k rpm but not noticable on the seat-o-pants dyno so you shouldn't have any problems. The yoshi slip-on also comes with a fitting for the exhuast servo (so does an Akra I think) See install pdf in the link.

http://www.yoshimura-rd.com/ps-3074-...s-slip-on.aspx

[PirateJafa]

http://www.kiwibiker.co.nz/forums/al...hmentid=184927

Don't ask me what it was stock though.

Still pulls nice and cleanly down low though - and feels much freer up the top.

[my_r32]

I have a brand new rs-5 slip-on exhaust sitting in my garage if you want it? Only problem is it dont have the fitting brackets or anything, or the servo motor bracket. A few of the parts needed to fit are on bikegearwarehouse.com.au but dont know where you get the servo motor bracket? Could maybe machine one up, or contact BikeGearWarehouse (aussie yoshi dealer) or maybe yoshimura directly?
PM for details