Hello guys,

I'm in need of some (technical) advice. I recently had my Tenere in for a service with a Yamaha dealer in London.
I had Kev's fuel and O2 mod installed and the bike rode very nicely. After getting the bike back and riding to work I noticed poor performance at low revs. I removed the seat and to my dismay, I discovered that the fuel mod had been removed and the wire into the temperature sensor soldered back together.
I'm obviously livid and will take the bike to the dealer tomorrow but the real question is, will I have done any damage to the engine? I did about 170 miles without the mod and the stage 2 filter fitted.

Any technical/legal advice would be appreciated.

Cheers