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New Exhaust

Entoptic

Entoptic

Red Power!
Joined
Mar 13, 2007
Location
Buy GoPro Now!
Moto(s)
MV Agusta Brutale Dragster RR
I should be receiving a new exhaust soon and was wondering if there is anything I need to do to my bike in terms of tuning it. None of my bikes have ever been worth over 2k and I never really put much thought into it when I changed the exhaust.

My new bike is another story and I was curious if there is something I need to do after changing out the exhaust. What do you normally do?
 
Even with some slip ons, you may need a to rejet or remap to the avoid the dreaded snap crackle and pop or glowing headers. Not all.
 
Don't tell anyone, but I installed the full Akropovic Carbon exhaust on my fz09 and haven't flashed the ecu yet. Yes, it's probably running a little lean, yes it will run better after flash. No, I haven't put too many miles on it since.
 
Smash Allen said:
Don't tell anyone, but I installed the full Akropovic Carbon exhaust on my fz09 and haven't flashed the ecu yet. Yes, it's probably running a little lean, yes it will run better after flash. No, I haven't put too many miles on it since.
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Haha. I ran mine w/out the flash for a bit with the dB killer out. It definitely runs better with the flash.
 
i think the factory runs your bike lean to begin with. so a full system (or even just swapping cans) can lean it out even more. even throwing an exhaust-specific map on a power commander / bazzaz should help it tremendously!
 
ran my zx12r w/new Akrapovic like that for ten years. When new owner bought bike he put ECU Flash mod on & had it dyno tuned. Only got a few more HP & solved the popping on deceleration. Apparently no problem at all even though I always wanted to do that mod...just never got around to it. :x
 
Sorry for the late reply. This will be a slip on. My concern is that I may damage the engine somehow. Not sure how, but I am worried.
 
Entoptic said:
Sorry for the late reply. This will be a slip on. My concern is that I may damage the engine somehow. Not sure how, but I am worried.
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do a dyno run before and after, make sure it has a sniffer (air/fuel ratio) then the dyno operator can tell you if you need a remap/flash or not. vast majority of bikes come lean from factory.
 
Entoptic said:
Sorry for the late reply. This will be a slip on. My concern is that I may damage the engine somehow. Not sure how, but I am worried.
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No. I've run several bikes with slip-on's and the engines were fine. Full system, that's another matter altogether.
 
Slip-on only (not full system) should be fine, maybe not 100% optimal but no engine damage to worry about.

If you really want to know what's really going on and get to 100% optimal then a baseline dyno run with the exhaust sniffer (hp/torque/air-fuel graph) is the only way to know for sure.
 
u never realize how many flat spots u have in the throttle response until after u get a custom map made.
 
you didn't mention the bike, but no matter. check your plugs before and after install, thru the full rev range. slip-on should be fine. full pipe, re-flash/re-jet. pretty much SOP.
 
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