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Discussion Starter · #1 ·
I finally got a chance to take my 05 999 with its newly installed 57 mm system for a serious highway/ backroads ride yesterday. The bike idles fine, has good low end power (3,000 - 5,500 rpm), and great high end power (7,500 - 11,000 rpm). I had previously noticed a flat spot from 5,500 - 7,500 but yesterday I realized that when holding a steady rpm at those speeds the bike surges badly. I realize that the 57mm system isn't going to help the midrange on my otherwise stock bike, but I don't think the surging that I am experiencing is normal - or is it. I didn't remove any of the fuel or vacuum lines when installing the exhaust, so there shouldn't be any issue there.
I did wrap the horizontal pipe leading from the front cylinder to help protect the fairing from the heat. Could the differencial heating/cooling lead to the surging? I doubt it.
Others have mentioned that they were unhappy with the ECU provided with these kits and added a Power Commander to improve the mixture. I'll go that route if I have to, but could something other than and improper fuel/air mixture be leading to this?

Thanks in advance.
 

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Discussion Starter · #3 ·
I should have mentioned in my original message that it was the 57mm kit - exhaust, ECU and air filters.
 

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Discussion Starter · #8 ·
brianmdavis said:
Robert,

Make sure you watch the lower left fairing below the kickstand for burning. It is very common in this spot. I had it with mine. Still trying to work out the issue. I'll need to space out the fairing at the back left side. Can't have the pipes touching the fairing, heat shielding or not. You need air to move by the pipes in all areas. Mine hesitates a bit at 3500 to 4500 RPM. After that, goes like gangbusters....

What do you think of that sound!
Have you tried wrapping your pipe? I don't particularly like the wrapped look (sorry Galaxy) so I wrapped as little as possible - but it works and is only noticable when looking through the fairing hole by the kickstand. After a very hard run (albeit in quite cool ambient temperature) I could easily touch the wrapping.
In addition to wrapping the pipe I put heat resistant shielding on the inside of the fairing. To move the fairing out I simply installed the bracket clip backwards. I'm referring to the clip on the bracket that bolts to the lower left of the engine. I bent the clip a little so that in its new position it won't slip up or down. It isn't as solid as the stock set-up but it works. A friend of mine has access to a machine shop, so in the long run I think we will make another bracket that positions the fairing farther out while having the clip properly mounted. Another option is to keep the stock bracket and put a heat resistant rubber spacer between the wrapped pipe and the fairing.

The sound, oh the sound. That is the whole reason (other than a little less weight with the titanium canister) I put the system on. Now the bike sounds as it should.
 

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Discussion Starter · #9 ·
Fox said:
you shouldn't be satisfied with a surging bike... or a midrange hole. you can tune that out. throw a powercommander on that bike and tune it, or have someone else tune it.
oh, and wrapping the pipe won't cause surging, wrapping the pipe causes higher exhaust temps inside the pipes, which increases exhaust scavaging of the cylinders.
I just thought it was an outside possibility that since only one pipe is wrapped that cylinders exhaust scavenging would be slightly different from that of the other cyliner. I didn't know if the tuning between the cylinders could then be different enough to make the bike run poorly...

Thanks for your input!
 

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Discussion Starter · #11 ·
Fox said:
interesting... you paid upwards of 3K i'm guessing for a full setup, and the ECU isn't working as it should? thats just terrible. Is there anyway to buy the exhaust by itself, and buy the filters and a PC3 (and some dyno time) seperately? I'm looking into a system for my bike, and i don't like the idea of overpaying for parts that don't work as they should.
You've got that right! That is why I am so surprised that even after getting the full kit it looks like I will have to add a PC3. Oh well, the one good thing about the ECU that I have now is that it raises the rev limit by 1,000 rpm. From what I have read the PC3 doesn't yet do that for the 999.
 
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