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I assume the engineers put it in to increase back pressure to increase torque. I do not belive they spent time in R&D and wasted money just for no reason. Just like the mufflers which are different sizes left and right for tuning sound at low and high rpm. Honda knows something you have not figured out yet. Bottom end might suffer, an annoying drone sound might come about or resonance might occur. Please keep us informed. An exhaust chain cutter would make a clean quick cut if anyone else is debating doing the mod.

On a side note, I rode a HD slim "S" with the 110 ci motor today. Besides vibrating at speed, it sounded like crap as I gotten use to the quiet smooth wine of the GoldWings 6. I like quiet.
 

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After reading all exhaust mod threads I have one questions answer on which I did not see yet - Does anyone add power commander or similar product to update fuel maps after non-stock exhaust added ? In the past I had Yamaha Warrior and Yamaha Raider SCL and power commander is a "must have" addition if exhaust system is updated (same story with mods on exhaust systems of race cars) , otherwise they do not run well. Without maps updated and dyno tuning the performance becomes very questionable. May be such huge engine does not show any symptoms during average speeds but I'm sure that there is some negative affect with stock maps and non-stock exhaust. Correct me if I'm wrong.
 

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The restricter tubes are fitted so that the bike will pass Euro 6 noise standards which are 93 DB down from 97 DB the Goldwing Does not use the restricter tubes because the mufflers are longer and run 3 baffle plates instead of 2 plates as in the F6C.

The r/h F6c muffler is smaller in diameter than the L/h because of the driveshaft.

Made very little difference noise wise and seat of the pants dyno says no lose of bottom end and revs much freer.
 

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No one I know of has added a Power Commander. Dynojet does not have any maps available other than the stock map. I contacted them myself when I was awaiting the release of the Torque Master pipes. They agreed to make atock map for that setup but I would have to bring the bike to Las Vegas after they scheduled a dyno time.

In the end, Torque Master released their pipes late in the year and I was unable to schedule a time between my shop being super busy and being too close to cooler temperatures.
 

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Discussion Starter · #10 ·
No one I know of has added a Power Commander. Dynojet does not have any maps available other than the stock map. I contacted them myself when I was awaiting the release of the Torque Master pipes. They agreed to make atock map for that setup but I would have to bring the bike to Las Vegas after they scheduled a dyno time.

In the end, Torque Master released their pipes late in the year and I was unable to schedule a time between my shop being super busy and being too close to cooler temperatures.
Just added a PC5 today got 111 hp 118 torque out of it with a K&N air filter as well
 

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Mine dynoed at 108Hp with 112ft.lbs. and it's bone stock.

So if those are figures for filter, aftermarket pipes, and PC-V then I'm not even going to bother spending $1500 for those gains. I have my dynoed sheet but I'm at work. I'll upload it later
 

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Discussion Starter · #13 ·
Mine dynoed at 108Hp with 112ft.lbs. and it's bone stock.

So if those are figures for filter, aftermarket pipes, and PC-V then I'm not even going to bother spending $1500 for those gains. I have my dynoed sheet but I'm at work. I'll upload it later
Stock pipes just debaffeled and took the restricter out and K&N filter
 

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I was worried there for a minute. If those were figures for aftermarket pipes, filter, and custom PC fuel map then I'd have been really disappointed.

Did you have a custom map made or just use the stock map from the Dynojet site?
 

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Discussion Starter · #15 ·
I was worried there for a minute. If those were figures for aftermarket pipes, filter, and custom PC fuel map then I'd have been really disappointed.

Did you have a custom map made or just use the stock map from the Dynojet site?
they mapped it when it was fitted but the 02 sensors are still conected as the o2 plugs that came with the unit did not fit
 

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Well, the O2 "eliminator" is just a resistor basically. It gives the ECU a constant reading so the factory ECU doesn't attempt to slightly adjust anything. It just makes it easier for someone building the map to get the A/F ratio right since they aren't having to basically deal with two ECU's.

It likely won't change the numbers for your dyno run at all since the factory ECU only adjusts in the lower RPM band and the dyno gives you your numbers from the peaks which aren't in that RPM band. It may however remove hesitation/make the bike smoother off idle and in the low RPM band once they are installed and the bike is mapped correctly.
 

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No restrictor in my pipe. I bought mine new with 1 mile on her after the pre delivery inspection. My muffler states 80 db limit. Picture below. Set aside a morning to modify it only to find the pleasant surprise it was not needed. Anyone else check theirs?
 

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The restrictor is before the muffler. Take of the muffler ad check to see if the header pipe has the restrictor in it. I believe it is other countries bikes that have a power limit on them, not the U.S. bikes but I could be wrong. Anyway, if someone can check theirs and let us know. Thanks.
 
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