The Dude Posted June 19, 2006 Share Posted June 19, 2006 Hello all. I have just bought the Akrapovic Megaphone slip-on race exhaust for my 06 R6. From what i can gather, the EXUP valve needs to be disconnected to fit this pipe. What exactly does the EXUP system do? What effect does it have on the performance of the bike and how will the bike be different once it's disconnected? Is running the bike without the EXUP valve connected a good thing or a bad thing? Thanks Link to comment Share on other sites More sharing options...
The Dude Posted June 20, 2006 Author Share Posted June 20, 2006 Don't all shout at once now Link to comment Share on other sites More sharing options...
storm grey Posted July 2, 2006 Share Posted July 2, 2006 Hello all. I have just bought the Akrapovic Megaphone slip-on race exhaust for my 06 R6. From what i can gather, the EXUP valve needs to be disconnected to fit this pipe. What exactly does the EXUP system do? What effect does it have on the performance of the bike and how will the bike be different once it's disconnected? Is running the bike without the EXUP valve connected a good thing or a bad thing? Thanks Are you fitting a full system or a end can? Link to comment Share on other sites More sharing options...
The Dude Posted July 4, 2006 Author Share Posted July 4, 2006 Slip-on usually means end can. I've fitted it already anyway. Sounds great and no ill effects from disconnecting the EXUP valve. All is well. I have to say, i expected more of a response to this, being a Yamaha forum and what not Link to comment Share on other sites More sharing options...
chrisw Posted July 5, 2006 Share Posted July 5, 2006 People can't answer what they don't know !! Not many people will have experianced the EXUP valve let alone an 06 R6. Link to comment Share on other sites More sharing options...
phillipw Posted July 8, 2006 Share Posted July 8, 2006 The exup valve, is a variable restictor in the exhaust system (looks a bit like the Thames barrier), take your silencer if and look down tha pipe with a torch you should be able to see it. It is controlled by the ignition module via a servo motor and two cables. By altering the gas flow it optimises the exhaust flow to suit the gas flow of the engine. At low rpm it is almost shut the higher the rpm the more it opens. I just had to replace one that was bent ?? on a 2001 Fazer 1000, cost £174.24 + VAT ! ! ! Link to comment Share on other sites More sharing options...
The Dude Posted July 10, 2006 Author Share Posted July 10, 2006 Well thats why we have forums old boy. You get enough people together, and together we know everything. Maybe i should have gone to the GSXR forum. I'm sure they'd know about an R6 Link to comment Share on other sites More sharing options...
Moderator Beezkneez Posted July 18, 2006 Moderator Share Posted July 18, 2006 you will have to rejet your carbs now of course you could leave them the way they are and have no power below 4k and start pinking at high revs and burn your valves out. The EXUP system is there for a purpose, personally i wouldnt take it off. Link to comment Share on other sites More sharing options...
Kitty-Cat Posted April 17, 2007 Share Posted April 17, 2007 you will have to rejet your carbs now of course you could leave them the way they are and have no power below 4k and start pinking at high revs and burn your valves out. The EXUP system is there for a purpose, personally i wouldnt take it off. what a load of crap! you will not have to re-jet your bike! numpty.... it is there for emission and noise purposes mainly - but can provide back pressure at low revs so there is a bit more torque lower down. Most people take them off to increase throttle response from low to mid revs where the 600's usually lack power. it does make a small difference to throttle response i have to say as i certainly noticed it - and there was less on off jerkiness in slow moving traffic as you get with the injection models. But the main reason to take them out is for noise! especially after fitting new pipes (slip ons) etc..... it also doesn't void a warranty by removing it - it will only void a warranty if it is found that removing that particular part has caused another to malfuction - but this has never happened since the fitting of the ex-up, set, or exsv valves. Link to comment Share on other sites More sharing options...
Moderator Beezkneez Posted April 17, 2007 Moderator Share Posted April 17, 2007 what a load of crap! you will not have to re-jet your bike! numpty.... it is there for emission and noise purposes mainly - but can provide back pressure at low revs so there is a bit more torque lower down. Most people take them off to increase throttle response from low to mid revs where the 600's usually lack power. it does make a small difference to throttle response i have to say as i certainly noticed it - and there was less on off jerkiness in slow moving traffic as you get with the injection models. But the main reason to take them out is for noise! especially after fitting new pipes (slip ons) etc..... it also doesn't void a warranty by removing it - it will only void a warranty if it is found that removing that particular part has caused another to malfuction - but this has never happened since the fitting of the ex-up, set, or exsv valves. i've never read so much shit in my life! after working on exups for over 13 years all i can say is listen to this advice at your own peril! Link to comment Share on other sites More sharing options...
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