DO Slip-ons make bike run rich? Or foul plugs?

[OB_HYABYA]

Recently bolted on some Yosh RS3 slip-ons. Bolted them on took it for the 1st ride no problem. Started it for a friend to check out the nice sound difference 2nd time it was started. Kind of noticed it loading up. Now today finally got decent to ride and the bike fired once then quit. I have not done the air box mod but should this be the difference in the bike not firing. Any suggestions??? the bike has 4700 mi. is a 99'.

 

[Guest]

You need to change the EFI fuel map. Just like you needed to put jet kits on, in the carburated days.

There are two ways of doing that. Have your dealer plug in a Yosh box and enrichen the maps. Alternatively buy a Power Commander II and download the slip-on map with a PC.

 

[OB_petesman]

i also just got slipon's on a 99 busa and the dealer told me that it would take around 500 miles for the bike to re-aline itself, any truth in this.

 

[jzdad]

i am interested in slip-ons too, don't really want to screw around with the rest of the bike, just a different look and sound.
do any slip-ons, just slip on???

 

[rotts4u]

Sorry but the bike does not adjust to exhaust changes. There are no sensors anywhere in the exhaust so it is basically impossible. It will run the same map that was put in at the factory until you remap it with a PCII or a yoshi box

Don

 

[Guest]

There are no O2 sensors used on the Busa like there are in cars which would enable the stock ECU to sample exhaust and make corrective changes. The Busa uses FIXED fuel maps - they are STATIC and will not change no matter what you add. Yes there are an assortment of them available selected on rider input variables but they are finite and based on stock air input/exhaust setup. This is the reason for the success of the PC2 and Yosh box where custom maps based on the added mods can be implemented instead of the fixed stock maps. I'm not sure why your dealer is blowing smoke up your butt - he wouldn't if he sold the PC2 or Yosh box. This is pretty common knowlege now. (I thought) It's not impossible - most fuel injected cars are capable of remapping over time within limitations but Suzuki did not use this type of setup on the Busa. Once the exhaust leaves the head the Busa's ECU has no means of sampling/no sensors to make changes.



[This message has been edited by Todd (edited 23 March 2000).]

 

[OB_Michael Lee]

HYABYA, unless you just want to pick up a few extra horsepower (maybe 3 or 4) leave your stock mapping alone. If you put slip-on's on a Hayabusa, you do not "HAVE" to remap your system or recalibrate anything. I have seen actual dyno numbers with stock, slip-ons, and full systems (Yosh) and without remaps the torque and horsepower curves were almost identical. Until you do the airbox / air filter mods with the systems if when the need for a true remap will be necessary.

Bottom line:

If you want additional horsepower buy a full system, bmc filter and do the box mods and remap.

If you want some additional sound and looks buy a slip-on system or a full system leave your maping alone so you don't lose tons of fuel milage and ride !!!!!

Check with your local dyno shop, they can show you the before and after dyno figures to help you determine the right set-up for you and your riding style. (drag racer, sport-rider, tourer)

Later.....

 

[OB_petesman]

i just came back from my dealer today and told him that the busa can not re-map itself after putting on slip-ons and he swore blind that it will. "All it takes is a couple of hundred miles and it will be perfect,i've put these cans on many a hayabusa (scorpion) and all of them are perfect".He also went on to say that scorpion will tell me the same thing.He finished by saying "trust me I would'nt lie to you , you will be plesently surprised by next week".Is he lying,i personally cant see a reason why he should as I am a good customer.
Some one also told me a digital ignition eliminates the need for re-mapping. ???????
Im confussed,i dont know anymore, AGRRRHHHHH!