Ways to Change A/F ratio

F

Fredyp33

Registered
Gonna be switching out the exhaust soon to a Coffman’s slip-on. Decided on it months ago and already purchased and have it at the house, so don’t need the “xyz exhaust is better” story.

Read Getn Off’s post a few weeks back that he was running lean after putting them on. Is a Power Commander the only way to update the air/fuel ratio? I’ve always had standard slip-on exhausts and have never had a need to change a/f.

Also I’ve never been a fan of maxing the bike out on a dyno. Can a/f be checked and updated without blasting through all the gears to redline? I’m new to the a/f ratio update thing and truly don’t know enough.


Thanks.
 
A Bazzaz system also regulates the AFR. Mine was fine tuned on a dyno....I suppose it can be installed without a dyno run.

Bazzaz

bazzaz.net bazzaz.net
 
Mr Brown said:
Why are you against getting a dyno tune? That is hands down the best way to make sure the bike is at optimal AFR throughout the range.
Click to expand...


Just feel it’s hard on the bike. I know once or twice isn’t gonna hurt it, but I always ride my bikes easy and don’t want to push it to the limits unnecessarily.
 
I get that, but I'll say two things: First, running it on a dyno isn't doing anything it wasn't designed to do. Just because you prefer to ride it gently doesn't mean it wasn't designed to be maxed out. It was, and if you're not the only person who's ever ridden it, it probably has been.
Second, the best way to achieve what you want is to put it on a dyno, so it wouldn't be running it hard unnecessarily, it would be for a specific purpose.
Just my $.02....
 
Mr Brown said:
I get that, but I'll say two things: First, running it on a dyno isn't doing anything it wasn't designed to do. Just because you prefer to ride it gently doesn't mean it wasn't designed to be maxed out. It was, and if you're not the only person who's ever ridden it, it probably has been.
Second, the best way to achieve what you want is to put it on a dyno, so it wouldn't be running it hard unnecessarily, it would be for a specific purpose.
Just my $.02....
Click to expand...
Hi. Yes I do not like to push my Busa to hard. That is I will set the revs to only 13500 RPM.
 
Mr Brown said:
I get that, but I'll say two things: First, running it on a dyno isn't doing anything it wasn't designed to do. Just because you prefer to ride it gently doesn't mean it wasn't designed to be maxed out. It was, and if you're not the only person who's ever ridden it, it probably has been.
Second, the best way to achieve what you want is to put it on a dyno, so it wouldn't be running it hard unnecessarily, it would be for a specific purpose.
Just my $.02....
Click to expand...

Is a power commander required too?
 
Check Kiwi's post on Teka tune it may be usefull

www.hayabusa.org

'99 Gen 1 DIY Fuel System Check and Maintenance | Maintenance and Do-It-Yourself

I thought this may be of interest to the Gen 1 owners, specifically the '99 and '00 model owners. Today I had some spare time after a 380km ride and thought, 'today's the day I check my fuel system compononents that I've never looked at in the 4 years I've had the ol' girl. I've been meaning to...
www.hayabusa.org www.hayabusa.org
 
Cantab said:
Check Kiwi's post on Teka tune it may be usefull

www.hayabusa.org

'99 Gen 1 DIY Fuel System Check and Maintenance | Maintenance and Do-It-Yourself

I thought this may be of interest to the Gen 1 owners, specifically the '99 and '00 model owners. Today I had some spare time after a 380km ride and thought, 'today's the day I check my fuel system compononents that I've never looked at in the 4 years I've had the ol' girl. I've been meaning to...
www.hayabusa.org www.hayabusa.org
Click to expand...
One thing about the Teka tune device, it's useful but you really need to read the mixture via road testing and then checking spark plug colour after everytime you make an adjustment.
That's very time consuming and tedious.
A dyno tune is the most efficient and accurate way of tuning via flashing the ECU fuel map ( a lot of work), or creating a fuel map for the PC5. (also a lot of work)
I've used the Teka, but it's a bit of a guessing game without knowing the actual A/F ratio using a O2 sensor feeding data to an A/F readout.
1598607

I would go with a good tuner and a PC custom map on a Dynojet dyno . . . my .02c FWIW
 
Kiwi Rider said:
One thing about the Teka tune device, it's useful but you really need to read the mixture via road testing and then checking spark plug colour after everytime you make an adjustment.
That's very time consuming and tedious.
A dyno tune is the most efficient and accurate way of tuning via flashing the ECU fuel map ( a lot of work), or creating a fuel map for the PC5. (also a lot of work)
I've used the Teka, but it's a bit of a guessing game without knowing the actual A/F ratio using a O2 sensor feeding data to an A/F readout.View attachment 1598607
I would go with a good tuner and a PC custom map on a Dynojet dyno . . . my .02c FWIW
Click to expand...
i would also..... PH for president
 
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