Ignore-fixed: Help - Triple K&N's installed & Overhe

I run TuneBoy in my bike but I think I read, recently, where the standard tune be in place before installing a PC3?
Whilst on the subject of overheating, I installed the 3 K & N's over the winter and yesterday noted that one of the mufflers (TOR's) is so hot that the exhaust gasses literally burned my hand from holding it close to the end of the pipe. The other two mufflers were running cool. Weird since the system runs 3-1-3 so all exhaust comes from the same place, not individual cylinders. It is the top righ one BTW.
 
If you have the tune for underseat K&N installed your bike is probably running too lean and will overheat. You're getting a lot more airflow through the triple K&Ns and the Triumph Jar and underseat filter tune is not set up for that much airflow. Lean is hot.
 
Jimmy Rocket said:
If you have the tune for underseat K&N installed your bike is probably running too lean and will overheat. You're getting a lot more airflow through the triple K&Ns and the Triumph Jar and underseat filter tune is not set up for that much airflow. Lean is hot.
I'm running the tune for Jars with 3 K&N's. What I'm wondering is why would two mufflers run cool while the third runs hot?
 
cat bypass or cat box?

not being an expert in thermodynamics ( or anything else really) myself, I can only come up with a completly crazy idea.... all the heat in your cat box is rising and exiting the topmost exhaust.... making it the hotter of the three.. try runnign the bike upside down to see what happens
( THATS A JOKE PEOPLE LIGHTEN UP)


barring science... Id also check the three pipes, and the outlets they connect to for clogs or anything else...

can you swap any of the pipes around? I ditched stock a long time ago so I don't remember.....

better yet ditch all the exhaust except the header and bungee cord and hose clamp a single cherry bomb to the header ( again people a joke lighten up)

let us know if you find anythign out..... but if its running lean its going to be warm... heat rises....
 
hmmm I can't think of any logical reason the top pipe is hotter...

are the three exiting the manifold close to same temp?

when I had my jardines I wrapped the header and under bike parts in header wrap to reduce temps, but both pipes were same...hottest part was the single coming off the manifold ,as to be expected...
 
Another tidbit -

I have Jardines, triple K&N, plates removed, Iridium plugs , old PCIII map
and also noticed that the left pipe is exhausting HOT and the right one is COOL!?

Strange. One would think that the heat would be fairly equal across the two as
it looks like a three header pipes merge and then divert into two.

Perhaps the extra pipe length under the engine is picking up and maintaining
extra heat...

She's running well so I'm ignoring for now.
 
I put an expensive 'Two Brothers' exhaust system on my sons Yamaha. It is 4 into 1 to 2, but all the exhaust exits the right hand carbon fiber muffler. The 'y' in the pipe slightly favors the right side and thats the direction the flow takes. The left side is cooler and cleaner.
The Predator pipe on my r3 may not have perfectly equal length headers, but the collector is dead on for the 3-1 system.
 
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