If one was to gut the cat (to reduce heat) on a stock touring M8 107 and leave the original mufflers on would it need a tune?

 

I don’t think so

 

Who should I ask? Fuel Moto

 

No

 

Cats lower flow by a very small amount. Since the intake is to remain the same the thruput will not change. A re-tune isn't going to do anything
except cost money.

 

I had heard alot of good things about fuel moto, so i gave them a call and sent a few emails. Every response I got was different? They were also very general in their answer when I specifically spelled out what I wanted information on. Wasn't a difficult question either. I'm glad others have had good interactions with fuel moto, but unfortunately I can't say the same. Very dissapointed.

 

Probably because you weren't calling about their product, you were calling about the effects of modifying a part. Companies don't have time to give just give advice. I can understand why they would dance around the issue. In a nutshell they are saying 'you havn't generated any revenue for us yet, call us back after you've made a purchase'.

 

You are probably right but actually I am ordering one of their headers and asked if the current slip ons I had would be a good combination. Guess I was asking too much, Seemed like a legitimate question.

 

Removing the cat will not cause any immediate problems. The O2 sensor will adjust and mostly keep the bike from running too lean. At idle, low RPM and accelerating, the bike will run lean. This will cause the motor itself to overheat. How much so depends on your riding style.

Also, you need to consider your warranty on an M8.

Finally, the cat is probably the single most expensive part on the bike. At last look, the contents of the cat go for: \
Platinum: $900 per ounce
Palladium: $790 per ounce
Rhodium: $850 per ounce

 

Forgive me but I am a little confused by your post. Bike will be getting a catless header, slipons, power vision tuner, SE Ventilator and dyno'd. Why would bike run lean if it is tuned properly? Thanks.