View Single Post
Old 01-22-2013, 06:57 PM   #4
4TooMany
Gnarly Adventurer
 
4TooMany's Avatar
 
Joined: Aug 2011
Location: Ann Arbor
Oddometer: 321
Quote:
Originally Posted by ebrabaek View Post
You might be on to something. If your CAT is plugged somewhat it will burn more gas, and get hotter down stream.
I've gotta disagree. If the exhaust was plugged, it would run richer, yes, but it would also run cooler.* Also, if it was clogged enough to make any difference in temperature, you'd have a noticeable loss of power. At risk of sounding like an ass, I think it's all in your head. The bike, stock, already runs so lean (and hot) that if it were running lean enough for the exhaust to get hotter, it wouldn't run at all. Just my two pennies.

*Edited to add: the only way in which excess fuel would cause the cat to get hotter is if there was also excess oxygen. The only way that would happen is if the bike was misfiring. And if it was misfiring, you'd notice. Simply running rich due to being clogged would make it run cooler.
__________________
MSF RiderCoach
2012 BMW F800GS Trophy
2011 Suzuki DRZ-400S

4TooMany screwed with this post 01-22-2013 at 07:10 PM
4TooMany is offline   Reply With Quote