is there a difference between gen 1 and gen 2 mufflers?

shift_enter

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i am looking at upgrading my exhaust can on my gen 1 and I see an aftermarket pipe for sale near me but it is for a gen 2. it shouldn't have changed much right?
 

SeaBass

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I just checked partzilla and it is the same part number for 2013 and 2019 on the muffler side.

On the headers, they are different part numbers though, but might just be due to the Catalytic converter,
 

bimota

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the headers on my gen1 has a joining piece between the 2 pipes at the front i don,t think that joining piece is in the front of the 2 header pipes on a gen 2 bike but mufflers do have same number so must be the same

rob
 

Longdog Cymru

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I can confirm that the Gen 2 bikes did not have the balance pipe in the header pipes, in fact, IIRC, Yamaha said that losing the balance pipe contributed to a couple of extra bhp on the Gen 2 bikes.
 

shift_enter

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the headers on my gen1 has a joining piece between the 2 pipes at the front i don,t think that joining piece is in the front of the 2 header pipes on a gen 2 bike but mufflers do have same number so must be the same

rob
i checked the parts diagram for the gasket that fits between the can and the headers and its the same part number between gen 1 & 2. im pretty sure the parts will fit perfectly.
 

Don in Lodi

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Many aftermarket mufflers are a slip fit at the joint, no gasket required... which means you've got to get the old cooked on one off there.
 

AusTexS10

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I can confirm that the Gen 2 bikes did not have the balance pipe in the header pipes, in fact, IIRC, Yamaha said that losing the balance pipe contributed to a couple of extra bhp on the Gen 2 bikes.
That news from Yamaha is good to hear, because I added Arrow headers to my 2013 and the Arrow has no balance pipe. This also eliminated the cat, and the bike (imagination or not) seems a bit peppier now. Next step is the ECU flash. Running the stock end can and even it sounds a bit better and mellower hooked onto the Arrow header.
 

fac191

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That news from Yamaha is good to hear, because I added Arrow headers to my 2013 and the Arrow has no balance pipe. This also eliminated the cat, and the bike (imagination or not) seems a bit peppier now. Next step is the ECU flash. Running the stock end can and even it sounds a bit better and mellower hooked onto the Arrow header.
Mine feels smoother and it revs more freely with the full system. Am going to get it set up again on a Dyno though.
 

Sierra1

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Mine feels smoother and it revs more freely with the full system. . . .
This makes sense to me. When I replaced the cat, and went to Turbo Muffler on my 4.0L Jeep, I could feel a marked difference in throttle/engine response. Not sure if was making more power or just got to the powerband faster. But, yeah, definitely revved quicker/easier.
 
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