CB650R Rapid Bike Dimsport

[Avf130]

Hello,
I bought my bike used and found out it has a Dimsport Rapid bike piggy back ECU.

Can someone explain why are these needed? Bike has BMC air filter and Akra exhaust system without DB killer

Thank You!

 

[miweber929]

Hello,
I bought my bike used and found out it has a Dimsport Rapid bike piggy back ECU.

Can someone explain why are these needed?

Because of this:

Bike has BMC air filter and Akra exhaust system without DB killer

Doesn't NEED a piggyback fuel controller but it doesn’t hurt.

 

[pablo]

Because of this:

Doesn't NEED a piggyback fuel controller but it doesn’t hurt.

Highly disagree
Once you are modding the original engine setup (intake/exhaust), you have to modify the AFR \ IGMITION TIMING

This is what the rapid is for

 

[miweber929]

Highly disagree
Once you are modding the original engine setup (intake/exhaust), you have to modify the AFR \ IGMITION TIMING

This is what the rapid is for

Respectfully, I disagree, it depends on your exhaust. Akra, for instance, specifically says you do not NEED one but one is recommended.

Put 5K miles on my CBR650F before selling it without a fuel controller and with the Akra exhaust. Bike ran great, not perfect but not bad enough to warrant a fuel controller.

I fully understand what’s it’s for, what it does and how it works, you just don’t NEED it for every pipe on every bike.

 

[Brammers]

The stock ecu can correct for quite a bit of change (exhaust for example).

If you do "everything" then yes, you can push the engine outside of that and a fuel controller is needed.

I ran my TBR pipe for a year or two before fitting the power commander. No issues.

J

 

[FATSN8KE]

My CBR650R has the Akra full exhaust system without an ECU remap. It has been running fine for over 5000km now.
I have done some research online, and most people report that an ECU remap would yield an insignificant gain in horsepower.

 

[Pete Croney]

With Euro 5 or 5+ O2 sensors, the standard map will give you almost everything available.
I’ve read some horror stories following new maps on these ECUs, so I would stay stock.
It’s not like the old carburettor days where re-jetting was essential.