i have a 06 foreman 500 es everything is stock besides 12 inch rims and 26 inch tires and i put a HMF pipe and a 170 main jet on it and it blew the first one out in like one hour so i took it to the honda dealer got the pipe replaced and adjusted the fuel screw and everything and it ran perfect. i ran it for about another hour and it blew another hole in it again. does anyone have a clue what might be wrong?
We are just trying to figure out why this mans pipe burned out twice.
He is running the 170 oem jet and adjusted his fuel screw yet he burned up two mufflers.
I see that the majority of 500 owners are running a 170 or a dynojet kit.
If this is correct then why is this mans pipe burning out when everyone else is running the same jet and not burning up.
We ran the 500 on the dyno and found the 170 to be a good baseline jet and 2.0 out on the fuel screw.
Please post what main jet you are running OR if you are running a dynojet kit so we can help this guy out.
Try taking the jet kit off, had it on mine when I got the HMF and it was making it pop really bad, took it off and made it run fine. The guy told me that the jet kit does little or no good (horsepower) try that, unless you just want a jet kit.
you got to have the whole dyno jet kit you cant just run with a main jet. the jet kit was supposed to come with the pipe. thats why its blowing im sure. ive never put one one without the dyno kit. i know that will fix it
The man just sent us back his pipe all I can say is WOW the inlet to the muffler is BLUE to the can and the can has a big hole in it. The muffler packing is turned to chunks of rock. I know our packing is good to 1200 degrees so something got really hot in there...NOT NORMAL HOT !!
I run the dyno here and do all the fuel recalibration and EFI mapping, to be honest with you all I could NOT begin to think how I would go about re creating this issue if I had to.
The stock 162 main, needle taper and fuel screw setting did not show up as seriously lean in our testing of this machine, no where even cloe to cause the damage of his muffler.
I'm sure if you all or even one of you had this problem with your 500's you would be letting us know on this forum.
So far not much BAD info on this subject.
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