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My R1 powertool rulezzz.
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Curious about your findings on the 07.

I have taken out the exup valve at my previous bike (04 R1) and I have some dyno's from that bike with the exup valve in original state and blocked in open situation. Not much power increasement, just slightly better. However, a better sound for sure. In my opinion Yamaha is using the exup valve for noise regulations.

Check the topic of the 04-06 on it:
http://www.r1-forum.com/forums/showthread.php?t=169872

And another topic on it:
http://www.r1-forum.com/forums/showthread.php?t=116890
 

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My R1 powertool rulezzz.
Joined
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237 Posts
a german tuner did all that shit for rn12. eliminate exup, gutt the cat, different stacks, in almost all possible combinations dynoed it and published it.

i have the pdf here. anybody interested? unfortuately it?s german language.
I am interested, as a Dutch guy I can read German :sneaky

I will send you a pm with my e-mail address
 
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