Jockey Journal Forum banner

1 - 8 of 8 Posts

·
Registered
Joined
·
8 Posts
Discussion Starter · #1 · (Edited)
2 into 1 vs 2 into 2

I'm putting together an XS650 cafe bike, and have been thinking of exhaust variations.

I've asked around about the performance and sound differences between a 2 into 2 vs a 2 into 1 and have gotten mostly lame answers other than a 2 into 1 will have a bit more bottom end a midrange.

Any thoughts?
Here's the ones I'm looking at from Mikesxs.com


and
 

·
Registered
Joined
·
9 Posts
Personally i like 2 into 2. If the performance gains are minimal fiqure out which look you like more and go for it.
 

·
Registered
Joined
·
967 Posts
I would have to think that you'd see some performance gain with the 2 into1 one pipe, just by scavenging. Honestly, though, it all comes down to what looks better to you.
 

·
Registered
Joined
·
8 Posts
Discussion Starter · #4 ·
KnuckleBuster said:
I would have to think that you'd see some performance gain with the 2 into1 one pipe, just by scavenging. Honestly, though, it all comes down to what looks better to you.
Sounds like there isn't enough performance to matter? Is it really just looks at this point?

Thanks for the replies.
 

·
Registered
Joined
·
12 Posts
This doesn't really apply to your bike, but i've got an FXR that originally had a 2-1 that was really nice. It broke at the junction welds so i sawed off the end. They were basically short drag pipes at that point. I did a little tuning, but i lost most of my low-end. It would move though at high rpm. I replaced those pipes with some 2-2 old school straight pipes and i had almost no low-end power even after adjusting and tuning. It ran great again at high rpm, but sucked at low rpm. Finally got a Thunderheader 2-1 and its the best thing i've ever done for my bike. It runs like a bat outta hell on the low end, tons of torque, and when it gets up into higher rpm's it wants to go even more.

Did a lot of research on pipes before i went back to the 2-1 and it seemed the general concencus, for Harley's at least, was that a 2-1 is always gonna be a better performance bet. Let us know what you decide.
 

·
Registered
Joined
·
936 Posts
2-1 is best bet for minimal tuning. 2-2 can be just as equitable but will require more tuning and some modification to the pipes to retain bottom end power.
 

·
Registered
Joined
·
1,074 Posts
2 into 1 will give better drivability at low speeds,
better drivability,and easier to tune.

Same thing with 3 into 1,4 into 1,4 into 2 into 1.

Individual pipes will sound louder,the same way dual exhaust on a car
will sound louder,even with the same reading on a Db meter.

Individual pipes will preform better on the street using smaller diameters,
longer lengths,with some sort of baffles,compared to some cool looking
short fat straight pipes.

But some will sacrifice performance just for looks.
 

·
Registered
Joined
·
8 Posts
Discussion Starter · #8 ·
Unkl Ian said:
2 into 1 will give better drivability at low speeds,
better drivability,and easier to tune.

Same thing with 3 into 1,4 into 1,4 into 2 into 1.

Individual pipes will sound louder,the same way dual exhaust on a car
will sound louder,even with the same reading on a Db meter.

Individual pipes will preform better on the street using smaller diameters,
longer lengths,with some sort of baffles,compared to some cool looking
short fat straight pipes.

But some will sacrifice performance just for looks.
2 into 1 it is. The XS is going to be low horsepower enough, so I'll take what I can get from the pipes. I'll probably try and find one with a reverse cone, rather than the megaphone on the one in the picture.

Thanks again
 
1 - 8 of 8 Posts
Top