I just installed the HMF dual exhaust on my kfx 700 and was checking out my top speed. I Ran it wide open for about 3 minutes and when I got to looking I noticed that inside of the exhuast was cherry red and it took about a minute or so for the redness to go away. I was wondering if this is normal. Any info would be appreciated.

 

that would suggest that you are lean on that cyl.

 

Im not sure what you mean by "lean on that cyl".

 

jet is to small, needs more gas.