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Old 01-09-2010, 08:08 PM   #1
Gixxer_Girl
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RaceFit Exhaust

I bought a racefit for my boyfriend, and since he installed it the bike has been idling higher.

Any suggestions on what the problem might be?

The bike is an 08 Gixxer 1000. (Please don't leave a smartass remark about the problem being that the bike is a Gixxer.)
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Old 01-09-2010, 08:13 PM   #2
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Just idle it a bit lower.
The idle screw in on the l/h side under the tank, turn it ccw just a bit while it's runnig at full temp till it's at 1100 rpm.
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Old 01-09-2010, 08:17 PM   #3
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Apparently the RPMs are bouncing too - will adjusting the idle screw fix that as well?
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Old 01-09-2010, 08:44 PM   #4
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No, it won't.
How much of a range are they varying?
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Old 01-09-2010, 10:12 PM   #5
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Between 1000 & 1500 RPM when it's warming up then stays at 1500 when the bike is at full temp.

He took the Racefit off today and put the stock exhaust back on just to see what would happen, and of course it idled just fine ~1000.

I didn't know if this might be a Racefit issue or he wasn't doing something right. Although, I don't know how one could screw up installing a slip-on. We were wondering if it might be an issue with the O2 sensor. He's just getting frustrated with it.
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Old 01-16-2010, 12:44 PM   #6
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Okay, so here we go... More issues with the Racefit exhaust.

After a little research we ended up buying a PC-V for the bike.
"That should solve the problem..."

Well, first there is no map for the PC-V for an 08 GSXR-1000. So he cut and paste and put a map together, blah, blah, blah...

Now he says (and I quote) - "You're gonna be mad... I have to go and get the bike dynoed"

So to make a long story short - unless we are totally missing something
DO NOT BUY A RACEFIT!!! - a way overpriced slip-on has turned into drama.

Please help if you have any ideas, or if you know of a good place to get the dyno done.

Thanks
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Old 01-16-2010, 01:11 PM   #7
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The issue with the idle bouncing around that you are having sounds just like my FZ1 after exhaust, intake mods and PCIII. All it took was Motorcycles Unlimited balancing my throttle bodies. I still bounces a tiny bit while the warm up chip is active but after that it is perfect. I can't tell you if that is the exact problem but you can't just slap on an exhaust and not expect to have to tune it a bit.
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Old 01-16-2010, 01:18 PM   #8
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Hard to imagine a slip on needing a dyno tune.
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Old 01-16-2010, 01:30 PM   #9
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every exhuast does this. most people just dont worry about it
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Old 01-16-2010, 01:35 PM   #10
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Quote:
Originally Posted by bluewave18 View Post
Hard to imagine a slip on needing a dyno tune.
The reason I think is emissions and O2 sensor. The stock pipes were so restrictive that once he put the Racefit on there was too much flow and no back pressure. If we partially block off the end of the pipe, it stops - go figure.
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Old 01-16-2010, 01:39 PM   #11
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Quote:
Originally Posted by Haileyan View Post
The issue with the idle bouncing around that you are having sounds just like my FZ1 after exhaust, intake mods and PCIII. All it took was Motorcycles Unlimited balancing my throttle bodies. I still bounces a tiny bit while the warm up chip is active but after that it is perfect. I can't tell you if that is the exact problem but you can't just slap on an exhaust and not expect to have to tune it a bit.
When we put new pipes on our 600's it wasn't really an issue, and not nearly as noticeable as it is on the 1000. Then again there weren't O2 sensors and on the 06's like there are on the newer bikes.

Sigh...
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