If you have replaced the stock exhaust system on the Scrambler with a freer flowing aftermarket unit that eliminates the stock catalytic converter - then a remap is certainly in order.
I don't care if your manufacturer of choice has stated "no remap required", as this is total bunk - they all lie (it would put a damper on their sales numbers otherwise).
The simple fact is this - running a freer flowing exhaust, without the CAT - will lean out your bike to almost dangerous levels. Running excessively lean on an air-cooled motor is not a smart thing to do. It raises exhaust and head temps considerably. Water cooled bikes can handle this temperature increase much more effectively, but not this bike. The Scrambler is already too lean in stock form, and if you make intake and/or exhaust mods you will lean it out even further.
Besides this obvious reason, there are also others. Adjusting the fueling will ensure that you are getting the most power out of your setup, and will also fix the many other fueling related "oddities" with this bike. It will run stronger, cooler and low end response will be dramatically improved (bye-bye "jerkiness", nothing but smooth power will remain).
I just got done spending almost an entire month dissecting the fuel delivery system and re-tuning my Scrambler - doing so has rewarded me with a MUCH smoother running bike, with greatly enhanced HP and torque - along with a much cooler running motor.
There are several ways you can accomplish much the same, ranging from a moderate investment in time, expertise required, and money - to a lot more of each (if you so desire). Here is a "rundown" of the options available at the time of this posting...
Piggyback Units
One of your options is to have someone install a "piggyback" type unit (like a Power Commander or similar).
Devices such as these are programmable boxes that sit behind you ECU. They replace the fuel mapping that is contained in the ECU with mapping of their own.
These type of units have some distinct disadvantages, though.
The Scrambler actually runs two different kinds of fueling systems. The first (and most basic) is a simple open loop system that relies on fuel mapping. The ECU monitors speed, rpm's and throttle position and delivers fuel based on a table (fuel map). The "piggyback" units replace the maps in the ECU with their own internal mapping in this scenario, delivering alterable amounts of fuel. If this was the only thing that affected fueling on tis bike, these would be more than adequate - but it's not the "only thing".
The Scrambler (like most modern bikes) also has a closed loop system in place. There are oxygen sensors in place that monitor rich or lean conditions present in the exhaust systems, and send feedback to the ECU. The ECU then adjusts fueling accordingly (but at MUCH too lean a state). This only happens when the throttle and rpm's are relatively stable, which can be often, and the piggyback units will NOT address this issue.
The other problem with these "boxes" is that if they fail, your bike will not run, leaving you stranded (and I've had one fail before).
A much better solution, IMO, is to reprogram the ECU itself. Doing so give you the most control over all of the systems, with the least potential for failure.
At this time, there is only one option (albeit with some "sub-options") to accomplish this - Rexxer.
Rexxer Tuning
With Rexxer, you can reprogram the ECU itself, altering the internal mapping, along with having control over a bunch of other parameters at the same time. You can choose to disable the "closed-loop" portion the system - the o2 sensors - if you wish, which greatly enhances overall "drive-ability".
You have 3 basic option in this scenario...
The first - and most simple - is to send them your ECU for re-flashing. There is a form that you fill out, listing all your mods & other options requested - and they reprogram your unit and ship it back within 48 hours. You will have new mapping that matches your particular setup - and have the option for them to disable the 02 system. This is the option that is suitable for most people, it requires no technical knowledge on your part and is very easy to do. The supplied mapping is VERY good, even though it was not tailored to your exact bike, and you can expect anywhere from 4-6 hp increase, with greatly enhanced drive-ability. The cost for this service is $300.
The second option is to take your bike to an authorized Rexxer dealer. They can reprogram the ECU to your EXACT bike, using a dyno. This is the way to get the most out of your individual setup. I have done this myself (I'm lucky to have access to a dyno - and years of tuning experience), and gained a whopping 9.5 HP over stock. The cost for this is variable.
The third option is to purchase a Rexxer "User" unit. This is a small "black-box" that interfaces with your ECU via the diagnostic port (cable is supplied). It comes with one map tailored to your setup (additional maps are optional). With this setup you get all the advantages of "option 1", with the added ability to alter other fueling parameters at any time. You can disable, or re-enable the 02 system for example, and clear error codes. You can also reset service indicators. Your original stock mapping is retained in the unit, and can be restored at any time. This cost for this option is $600.
I'm not affiliated with Rexxer in any professional way, and usually do not "gush" about vendors in the performance industry, but this has been simply one of the best experiences I have ever had in many years of doing this.
In the US, the people to contact about any of the Rexxer options is Redline Performance, located in Yorktown Virginia. They are a Ducati dealer, and the headquarters for Rexxer USA. Here is their contact info...
Redline Performance Motorsports
7331 George Washington Memorial Hwy, Yorktown, VA 23692
(757) 989-5000
David (the owner) is the one you want to speak to. He's a pretty busy guy, but always answers emails sent to "david@rexxer.com".
I don't care if your manufacturer of choice has stated "no remap required", as this is total bunk - they all lie (it would put a damper on their sales numbers otherwise).
The simple fact is this - running a freer flowing exhaust, without the CAT - will lean out your bike to almost dangerous levels. Running excessively lean on an air-cooled motor is not a smart thing to do. It raises exhaust and head temps considerably. Water cooled bikes can handle this temperature increase much more effectively, but not this bike. The Scrambler is already too lean in stock form, and if you make intake and/or exhaust mods you will lean it out even further.
Besides this obvious reason, there are also others. Adjusting the fueling will ensure that you are getting the most power out of your setup, and will also fix the many other fueling related "oddities" with this bike. It will run stronger, cooler and low end response will be dramatically improved (bye-bye "jerkiness", nothing but smooth power will remain).
I just got done spending almost an entire month dissecting the fuel delivery system and re-tuning my Scrambler - doing so has rewarded me with a MUCH smoother running bike, with greatly enhanced HP and torque - along with a much cooler running motor.
There are several ways you can accomplish much the same, ranging from a moderate investment in time, expertise required, and money - to a lot more of each (if you so desire). Here is a "rundown" of the options available at the time of this posting...
Piggyback Units
One of your options is to have someone install a "piggyback" type unit (like a Power Commander or similar).
Devices such as these are programmable boxes that sit behind you ECU. They replace the fuel mapping that is contained in the ECU with mapping of their own.
These type of units have some distinct disadvantages, though.
The Scrambler actually runs two different kinds of fueling systems. The first (and most basic) is a simple open loop system that relies on fuel mapping. The ECU monitors speed, rpm's and throttle position and delivers fuel based on a table (fuel map). The "piggyback" units replace the maps in the ECU with their own internal mapping in this scenario, delivering alterable amounts of fuel. If this was the only thing that affected fueling on tis bike, these would be more than adequate - but it's not the "only thing".
The Scrambler (like most modern bikes) also has a closed loop system in place. There are oxygen sensors in place that monitor rich or lean conditions present in the exhaust systems, and send feedback to the ECU. The ECU then adjusts fueling accordingly (but at MUCH too lean a state). This only happens when the throttle and rpm's are relatively stable, which can be often, and the piggyback units will NOT address this issue.
The other problem with these "boxes" is that if they fail, your bike will not run, leaving you stranded (and I've had one fail before).
A much better solution, IMO, is to reprogram the ECU itself. Doing so give you the most control over all of the systems, with the least potential for failure.
At this time, there is only one option (albeit with some "sub-options") to accomplish this - Rexxer.
Rexxer Tuning
With Rexxer, you can reprogram the ECU itself, altering the internal mapping, along with having control over a bunch of other parameters at the same time. You can choose to disable the "closed-loop" portion the system - the o2 sensors - if you wish, which greatly enhances overall "drive-ability".
You have 3 basic option in this scenario...
The first - and most simple - is to send them your ECU for re-flashing. There is a form that you fill out, listing all your mods & other options requested - and they reprogram your unit and ship it back within 48 hours. You will have new mapping that matches your particular setup - and have the option for them to disable the 02 system. This is the option that is suitable for most people, it requires no technical knowledge on your part and is very easy to do. The supplied mapping is VERY good, even though it was not tailored to your exact bike, and you can expect anywhere from 4-6 hp increase, with greatly enhanced drive-ability. The cost for this service is $300.
The second option is to take your bike to an authorized Rexxer dealer. They can reprogram the ECU to your EXACT bike, using a dyno. This is the way to get the most out of your individual setup. I have done this myself (I'm lucky to have access to a dyno - and years of tuning experience), and gained a whopping 9.5 HP over stock. The cost for this is variable.
The third option is to purchase a Rexxer "User" unit. This is a small "black-box" that interfaces with your ECU via the diagnostic port (cable is supplied). It comes with one map tailored to your setup (additional maps are optional). With this setup you get all the advantages of "option 1", with the added ability to alter other fueling parameters at any time. You can disable, or re-enable the 02 system for example, and clear error codes. You can also reset service indicators. Your original stock mapping is retained in the unit, and can be restored at any time. This cost for this option is $600.
I'm not affiliated with Rexxer in any professional way, and usually do not "gush" about vendors in the performance industry, but this has been simply one of the best experiences I have ever had in many years of doing this.
In the US, the people to contact about any of the Rexxer options is Redline Performance, located in Yorktown Virginia. They are a Ducati dealer, and the headquarters for Rexxer USA. Here is their contact info...
Redline Performance Motorsports
7331 George Washington Memorial Hwy, Yorktown, VA 23692
(757) 989-5000
David (the owner) is the one you want to speak to. He's a pretty busy guy, but always answers emails sent to "david@rexxer.com".
