Jump to content
Yamaha Tenere 700 Forum
  • 0

t 700 head pipe

pat fitz


does anyone know if i stripped the cat out of the original head pipe and just left the sensor would it cause any problems

Link to comment
Share on other sites

2 answers to this question

Recommended Posts

  • 2
  • Supporting Vendor

Yes, you will need an ECU flash if you remove the catalyst material from the stock header.


In layman's terms, this will dramatically increase airflow, and the ECU has no way of knowing to increase fuel volume without a change to the mapping. We have mapping that will address your specific exhaust modification and dramatically improve performance!


For the moment, you can purchase the flash for the T7's using this link from our FZ/MT-07 flash:



Be sure to use the coupon code "forum member" to save $25!



  • Like 1


Link to comment
Share on other sites

  • 0

We ran into this on fz07.org (same engine) and yes, when you pull.the cat out of the header or change the exhaust on the CP2 engine, your engine actually loses power (proven on Dyno) for the reasons stated above. It bogs, it's noticeable and cracks loudly when you release the throttle. Flames out the exhaust too when you release the throttle. 


When winter arrives and you can't ride the bike anyways, send your ECU to @2 Wheel DynoWorks because they know the CP2 mapping better than anyone else. All the other tuners are just "trying" to copy their tune. 


Or, you can live with the lower power and try not to start a fire when the exhaust flames out. The ECU needs to be programmed to deal with the increased air flow on Fuel Injected computerized engines. 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Our Friends

Tenere across the USA

Tenere 700 Forum. We are just Tenere 700 owners and fans

Tenere700.net is not affiliated with Yamaha Motor Co and any opinions expressed on this website are solely those of ea individual author and do not represent Yamaha Motor Co or Tenere700.net .

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.