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Discussion Starter · #1 ·
Hey guys need your input. I have a 2010 Brute force 750, I want to install a HMF uitlity series exhaust slip on, on my brute. According to some people they say you have to buy a programmer for it too run properly, my opinion the programmer is only to get max performance out of the exhaust, but its not required is this true? According to the dealer, if you install a slip on you dont have to recalibrate the ecu, thats why its fuel injection it recalabrates itself when mods are added or etc.. Any input would be greatly appreciated.
 

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Hey guys need your input. I have a 2010 Brute force 750, I want to install a HMF uitlity series exhaust slip on, on my brute. According to some people they say you have to buy a programmer for it too run properly, my opinion the programmer is only to get max performance out of the exhaust, but its not required is this true? According to the dealer, if you install a slip on you dont have to recalibrate the ecu, thats why its fuel injection it recalabrates itself when mods are added or etc.. Any input would be greatly appreciated.
I just put a swamp series on mine {'09 efi} and the rear pipe glows...let me know if yours does it. My Dealer less than 10 minutes ago re-assurred me through Kawi Tech that this is "normal". No add-on programmers, stock except for mudder lid.
 

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Discussion Starter · #3 ·
hey my friend thanks for the quick reply. I heard Kawi are known for glowing pipes when you install exhaust. Did you notice them glow before you install the aftermakdet exhaust? I will be ordering my exhaust tomorrow pending the replies i get too thread, dont really want to have to buy an ecu upgrade and jack with the computer, but keep me posted if you have any issues.
 

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hey my friend thanks for the quick reply. I heard Kawi are known for glowing pipes when you install exhaust. Did you notice them glow before you install the aftermakdet exhaust? I will be ordering my exhaust tomorrow pending the replies i get too thread, dont really want to have to buy an ecu upgrade and jack with the computer, but keep me posted if you have any issues.
My stock rear glows. With the HMF, due to the thinner construction glows more. I have been posting under "low speed lean pop", for this issue as well. :)
 

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Hey guys need your input. I have a 2010 Brute force 750, I want to install a HMF uitlity series exhaust slip on, on my brute. According to some people they say you have to buy a programmer for it too run properly, my opinion the programmer is only to get max performance out of the exhaust, but its not required is this true? According to the dealer, if you install a slip on you dont have to recalibrate the ecu, thats why its fuel injection it recalabrates itself when mods are added or etc.. Any input would be greatly appreciated.
Don't use your dealer again, he is so wrong. EFI does not compensate for any mods cause unlike a car or truck we do not have a O2 sensor. If that were true there would be no need for a fuel controller, power commander, forth coming MSD etc.

Adding a slip on will not require a fuel controller but also don't expect much of a power gain, the power is made in the pipes not the cans.

Todd
 

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Discussion Starter · #6 ·
Thanks for the input,brute has enough power in stock form for me, i am putting the exhaust for sound, i just dont want to have to by the optimizer............
 

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fstang, I agree with Hunterworks...I believe adding the optimizer allowed me to tune it to where the Swamp series actually runs cooler although like said, they are thinner material.
 

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Discussion Starter · #8 ·
well guys installed the hmf slip on exhaust and went on a three hour trail ride, i noticed on deacceleration it will pop, backfire, but up in mid to high rpm it runs fine just on low rpm i notice and deaccleration i here the poping sound out of the exhaust. Im assuming its not get enough air at low rpm to mix with fuel properly, thinking of getting a k&n air filter and see if it dont solve the problem, if not i guess i will have to get the hmf optimizer.
 

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That's not your problem, the design of the muffler with no baffles allows it to suck air back in thru the muffler and since the rear stock pipe is so short it will backfire due to the lean condition from the air coming back in thru muffler.

Not just a lot you can do about. You can however just blip the throttle on decel

Please pass on the K&N filter, got a Kawi V twin in shop now destroyed from K&N filter, too much dirt passes.
 

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Discussion Starter · #10 ·
hunterwork is there a solution for the backfire, dude i need hmf optimizer
 

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hunterwork is there a solution for the backfire, dude i need hmf optimizer
Hard to say for sure if it would help, my first reaction is it won't cause of what is causing it.

See if you get your air/fuel right at idle with optimizer then let off throttle and fresh air gets sucked back in exhaust it makes the exhaust gases really lean if you add fuel on the optimizer it might help the issue but will cause you to be running really rich at idle.

This is pretty normal for a free flowing exhaust.

The best choice would have been to buy the complete system and the optimizer
 
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