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+--- Thread: Anybody got rid of the EXUP Valve and lived to tell the tale ? (/showthread.php?tid=74733)
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Anybody got rid of the EXUP Valve and lived to tell the tale ? - mark g - 19-01-16
Just having a browse on Ebay and noticed these new headers for sale, they took my eye because one of the guys in Practical Sports bike mag just fitted the same brand exhaust system on to his bike:
http://www.ebay.co.uk/itm/YAMAHA-FZS-1000-FZS1000-FAZER-EXHAUST-DOWNPIPES-FRONTPIPES-DOWN-PIPES-/141446021887?hash=item20eed702ff:g:V6oAAOSwLVZVn83a
The blurb says it the pipes will run fine with no mods as long as your bike is standard, I've read on here that it's a massive no no to try and remove the EXUP valve and have the bike run right.
Thoughts please guys :rolleyes
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - devilsyam - 19-01-16
re badged sandy bike spares exhaust and yep its a no no
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - nickodemon - 19-01-16
+1 it's a no no...
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - nickodemon - 19-01-16
Here is a set of original downpipes. It looks like the exup valve is attached, but check with seller.
http://www.ebay.co.uk/itm/YAMAHA-FAZER-1000-2003-FZS-DOWNPIPES-EXHAUST-HEADERS-/272110137842?hash=item3f5b0731f2:g:l30AAOSwL7VWnprg
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - Mark YPVS - 20-01-16
I replaced the exup on both of my R1s (5jj carbs) and (5pw injection) with race Hindle headers , the 5jj gave more power through out the rev range 73 torque and 132 bhp with exup to 79 torque and 144 bhp with Hindle headers and about 1 hour dyno time, i havnt dynoed the 5pw yet, i think if you want to remove the exup i would fit either race headers or wire it open, i know its a Fazer not an R1 but there isn't that much difference
Mark
[size=78%] [/size]
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - coffee - 20-01-16
When I bought my FZ1N it had a Scorpion can on and the previous owner had disconnected the ex/up valve leaving the cables taped up under the seat.I don't know if he did any mods to the bike but it runs great,perhaps the only thing I could say is that it pops on the overrun which is ok with me anyway. :lol
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - slappy - 20-01-16
(20-01-16, 04:20 PM)coffee link Wrote: When I bought my FZ1N it had a Scorpion can on and the previous owner had disconnected the ex/up valve leaving the cables taped up under the seat.I don't know if he did any mods to the bike but it runs great,perhaps the only thing I could say is that it pops on the overrun which is ok with me anyway. :lol
The fzs1000 gen1 needs the exup in place to run correctly, the FZ1 gen2 does not.
On the FZ1 it is just for emissions and does not seem to affect the running at all, just about every FZ1 with an aftermarket can has no exup fitted.
If the popping on the overrun does start to bother you just disconnect the ais and block it off
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - mark g - 20-01-16
Cheers for the response guys, I'm just curious as to why the seller on ebay is saying it won't have no adverse affect on performance. My headers are OK and I'm in no rush to get rid of the EXUP as I've not long had all the bolts drilled and tapped out etc.
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - Falcon 269 - 20-01-16
The ad says no rejetting required, which isn't quite the same thing.
The FZS1000 is sensitive to exhaust header design. If the primary and secondary pipe lengths on a 4-2-1 system aren't right, you get a flat spot in the 3 - 4k rpm range which is impossible to tune out. I've seen dyno charts for these headers and it's clear that they're not as well designed as the systems offered by Akrapovic and the other recognised exhaust specialists.
Get the EXUP working properly rather than wire it open.
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - Marc125030 - 21-01-16
I used to own a thunderace and the bottom end grunt was seriously affected when the exup valve was locked into the open/high rev position
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - mark g - 21-01-16
Mines working fine so that's the way I'll keep it, must admit I do think the Ebay ad is quite misleading.....naughty boys lol
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - carluk1964 - 03-11-18
I hope this helps someone who has problems with there Fazer 1000 EXUP and is thinking about buying headers from BlackWidow. I have a 2004 Fazer 1000 and the EXUP rattled like a pig, so I decided to buy the headers of eBay the ones that don't have the EXUP in them.
I was nervous at first after reading the reviews saying about power loss etc, I've had mine on for 3weeks now and I have lost a tiny bit of mid range power , hardly noticeable.
Also the exhaust sounds a lot louder, it pops and sound awesome. I kept my old headers just in case, but I won't be using them anymore.
No more rattling for me.......
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - tex - 04-11-18
I've got the holeshot headers on mine , work great , very slight hesitation low down in high gear but not a problem, really good kick up top , I think they still have some on there sight .
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - stevierst - 04-11-18
I’ve just replaced the exup valve on my gen 1 after running it without for a month or so. The previous owner had the bike into a ‘carb specialist’ as it wasn’t running right with no valve. He apparently richened up the mixture and it ran ok. It’s already been dynojetted, and there’s a R/R printout for 131 bhp and 75lb torque exupless. Not too shabby!
I replaced the exup, and it feels like there’s 10-15% more mid range now, the bike runs better, and I’m getting better fuel economy too.
I don’t nail the engine too often anyway, as my commute is all town work, so why the hell would I want all the power up near the red line? ?
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - ogri48 - 04-11-18
my 04 37k exup rattles like a pig, especially cold, but i'd never lose it. im guessing if I put a washer or two next to the little spacer it would get to hot and bind up?
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - Falcon 269 - 05-11-18
Depends on where the wear is. If it's end float, I'd try a stronger/longer spring between the pulley and the pulley washer.
If the wear is in the bushes/valve spindle, the only solution is to replace the worn parts or have new bushes machined up to appropriate specs.
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - ogri48 - 05-11-18
think its the bush mike. got a good mate with a lathe..any idea what metal it is please?
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - Falcon 269 - 05-11-18
Some type of bronze alloy, I believe.
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - ogri48 - 05-11-18
cheers Mike. im guessing pete will know a good equivalent. good job its not me, id use Delrin to make it easy to turn...
Re: Anybody got rid of the EXUP Valve and lived to tell the tale ? - coffee - 05-11-18
(19-01-16, 10:56 PM)nickodemon link Wrote: +1 it's a no no...
Would the same apply for a Gen2? I was going to get a set of these but if there's any hassle I'd just as soon not bother.I thought you could just do away with the cat and old pipes ,connect to link pipe and can and it would run o.k. seems not, ay? :think