aftermarket exhaust problem - Honda Motorcycles - FireBlades.org
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post #1 of 18 Old 10-15-2013, 9:24 AM Thread Starter
 
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aftermarket exhaust problem

Hey guys does my bike need any sort of tuning if i install an akra slip on? This is all new to me so I'm in need of some good advice, thanks
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post #2 of 18 Old 10-15-2013, 9:37 AM
 
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Re: aftermarket exhaust problem

Depends on what kind of bike you have =P

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post #3 of 18 Old 10-15-2013, 9:40 AM
 
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Re: aftermarket exhaust problem

Be aware that slip-ons usually may require disconnect of the cables that control the "flapper" valve in the stock "cans", There are numerous ways to resolve the issue, but if the control servo is "disconnected" on many bikes, the FI warning light will come on. Many solutions, but in most cases a "servo buddy" which plugs into the ECU is probably the easiest method. You may want to re-map the ECU to compensate for the better free flow which can sometimes cause a lean mix condition. Depends.
.
I've been through this on my 08 CBR1000RR (Yoshi R77 system) and on my '12 ZX6R (Dan-Moto slip on).
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Just some thoughts.

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post #4 of 18 Old 10-15-2013, 9:46 AM
 
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Re: aftermarket exhaust problem

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Originally Posted by groomlake View Post
Be aware that slip-ons usually may require disconnect of the cables that control the "flapper" valve in the stock "cans", There are numerous ways to resolve the issue, but if the control servo is "disconnected" on many bikes, the FI warning light will come on.
Or you can just remove the cables and leave the servo in place.

The bike will run better with a Power Commander after changing the exhaust, but it's not a REQUIREMENT.

If the bike isn't braking properly, you don't start by rebuilding the engine.
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post #5 of 18 Old 10-15-2013, 9:49 AM Thread Starter
 
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Re: aftermarket exhaust problem

Yeah right iv'e just got a new repsol blade and and an akra slip on to match but i only got as far as disconnecting the cable from the servo motor before i realised i had an O2 sensor which needed to be disconnected and the instructions didn't say what to do with it
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Re: aftermarket exhaust problem

Check with Akrapovich as you may have to install a "bung" to attach the sensor. There may be an O2 bypass circuit (null bypass), but on that I will leave any advice to those who have been down the "road", LOL!!!

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post #7 of 18 Old 10-15-2013, 10:01 AM
 
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Re: aftermarket exhaust problem

Just leave it unplugged. You'll get a light on the dash, but you can ignore it. 3 ways of fixing it:

a) drill a hole in the new midpipe and weld in a nut for the sensor to screw into
b) Buy an "eliminator" from dynojet - I think they're about 20-30 dollars
c) Insert a 330ohm resistor into the socket where the sensor would normally plug into (which is what the dynojet eliminator is, just in a fancy cap).

If the bike isn't braking properly, you don't start by rebuilding the engine.
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post #8 of 18 Old 10-15-2013, 10:06 AM
 
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Re: aftermarket exhaust problem

Option "A" - the "infamous" mid pipe "bung" modification!!! I was lucky... non-CA bikes...
.
Great response to Bryson's pending mods.

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post #9 of 18 Old 10-15-2013, 12:52 PM
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Re: aftermarket exhaust problem

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Originally Posted by BRYSON519 View Post
Hey guys does my bike need any sort of tuning if i install an akra slip on? This is all new to me so I'm in need of some good advice, thanks

Generally no, but maybe if we knew what sort of bike you have it would be helpful ;-)

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post #10 of 18 Old 10-15-2013, 12:53 PM
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Re: aftermarket exhaust problem

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Originally Posted by BRYSON519 View Post
Yeah right iv'e just got a new repsol blade and and an akra slip on to match but i only got as far as disconnecting the cable from the servo motor before i realised i had an O2 sensor which needed to be disconnected and the instructions didn't say what to do with it

The O2 sensor should be in the midpipe though, you mean it's in the muffler on your bike?
If you have to disconnect the sensor then you need make or buy a Sensor Eliminator from Dynojet.

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post #11 of 18 Old 10-16-2013, 6:09 AM Thread Starter
 
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Re: aftermarket exhaust problem

Hey guys thanks for the great replies, as luck would have it a motorcycle mechanic started at where i work so i took the mid pipe in and turns out its got a bung for the 02 sensor! Like i said I'm new to this
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post #12 of 18 Old 10-16-2013, 6:10 AM
 
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Re: aftermarket exhaust problem

Quote:
Originally Posted by BRYSON519 View Post
Hey guys thanks for the great replies, as luck would have it a motorcycle mechanic started at where i work so i took the mid pipe in and turns out its got a bung for the 02 sensor! Like i said I'm new to this
Easy fix

If the bike isn't braking properly, you don't start by rebuilding the engine.
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post #13 of 18 Old 10-21-2013, 5:52 AM Thread Starter
 
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Re: aftermarket exhaust problem

Hey guys i fitted the akra slip on and after a bit of drama it all went on pretty well, looks great and weighs a lot less than the stocker, only been for a short ride but noticed it was a lot less punchy off the bottom but very smooth, like riding in molasses, is that a common occurrence with slip on pipes or something else, still using the stock air filter, sounds awesome though
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Re: aftermarket exhaust problem

You will lose bottom end - aftermarket pipes tend to focus on top end (more flow) so you lose backpressure which aids bottom end. Have you fitted a Power Commander?

If the bike isn't braking properly, you don't start by rebuilding the engine.
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post #15 of 18 Old 10-21-2013, 7:21 AM Thread Starter
 
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Re: aftermarket exhaust problem

Nah haven't looked into that yet, still running it in actually only put 300 k's on it, won't affect the engine will it? Hope to go for a good ride this w/end to get a better idea how it's changed the bike
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