Exhaust, one more time... - Wrist Twisters
 
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post #1 of 16 Old 10-02-2014, 11:28 AM Thread Starter
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Exhaust, one more time...

I have a question and I think you can help me.

I want to change the exhaust pipes and do not mind the brand, material or sound. All of that is secondary to me ... I want the best exhaust pipes in relation to performance.

I think that brands like Mivv, Delkevic etc ... will not win performance but may itself with Yoshi, Akra ...?

Thanks!

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post #2 of 16 Old 10-02-2014, 11:47 AM
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Ok, you've just opened a can of worms...

1) ANY aftermarket exhaust will give a little bit of performance gain.
2) 95% of those gains come from just ditching the stock exhaust. Which means your argument is only valid for 5% of the gains (we are talking maybe 3hp? if that?) - so 5% of 3 HP. You are looking for 1/5th of a hp (again, this is not fully scientific, just trying to prove a point.

THEN, you add on the complexities of whether you do a 900rr mid-pipe conversion, lose a bit of mid-range, but gain on the top? AND/OR adding in a Power Commander, with at least 3 dozen different, separately dynoed maps made at different elevations, on different machines, with different bikes, and by different operators.

My vote? Pick the aftermarket exhaust you like for SOUND first, THEN looks. And forget about the rest. Well, actually, no, I would recommend a Power Commander, because that can really smooth out the throttle.

And if you want to get really picky, get the pipes you like, then get your bike dynoe'd (will require a PCIII). That's the best way to get the most out of YOUR bike.

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post #3 of 16 Old 10-02-2014, 01:24 PM
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Quote:
Originally Posted by g00gl3it View Post
Ok, you've just opened a can of worms...

1) ANY aftermarket exhaust will give a little bit of performance gain.
2) 95% of those gains come from just ditching the stock exhaust. Which means your argument is only valid for 5% of the gains (we are talking maybe 3hp? if that?) - so 5% of 3 HP. You are looking for 1/5th of a hp (again, this is not fully scientific, just trying to prove a point.

THEN, you add on the complexities of whether you do a 900rr mid-pipe conversion, lose a bit of mid-range, but gain on the top? AND/OR adding in a Power Commander, with at least 3 dozen different, separately dynoed maps made at different elevations, on different machines, with different bikes, and by different operators.

My vote? Pick the aftermarket exhaust you like for SOUND first, THEN looks. And forget about the rest. Well, actually, no, I would recommend a Power Commander, because that can really smooth out the throttle.

And if you want to get really picky, get the pipes you like, then get your bike dynoe'd (will require a PCIII). That's the best way to get the most out of YOUR bike.
Do you recommend these ahead of suspension mods?

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post #4 of 16 Old 10-02-2014, 01:27 PM
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Do you recommend these ahead of suspension mods?
You HAD to ask!!!!

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post #5 of 16 Old 10-02-2014, 03:04 PM
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Do you recommend these ahead of suspension mods?
I almost replied... Then I saw who posted... LOL!

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post #6 of 16 Old 10-02-2014, 03:09 PM Thread Starter
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Quote:
Originally Posted by g00gl3it View Post
Ok, you've just opened a can of worms...

1) ANY aftermarket exhaust will give a little bit of performance gain.
2) 95% of those gains come from just ditching the stock exhaust. Which means your argument is only valid for 5% of the gains (we are talking maybe 3hp? if that?) - so 5% of 3 HP. You are looking for 1/5th of a hp (again, this is not fully scientific, just trying to prove a point.

THEN, you add on the complexities of whether you do a 900rr mid-pipe conversion, lose a bit of mid-range, but gain on the top? AND/OR adding in a Power Commander, with at least 3 dozen different, separately dynoed maps made at different elevations, on different machines, with different bikes, and by different operators.

My vote? Pick the aftermarket exhaust you like for SOUND first, THEN looks. And forget about the rest. Well, actually, no, I would recommend a Power Commander, because that can really smooth out the throttle.

And if you want to get really picky, get the pipes you like, then get your bike dynoe'd (will require a PCIII). That's the best way to get the most out of YOUR bike.
Sure! One option is the 900RR conversion but do not want to lose low and mid range. I also think the dual exhaust is the hallmark of this bike ...

I think the first thing I'll do is buy a splitter exhaust pipe (I will not win more hp but I will win more fun )

Posibly I decide for Yoshi although I've read that (at least in Europe) is not legal for road use. Someone knows the reason? Gases or noise?

Thanks!

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post #7 of 16 Old 10-02-2014, 05:33 PM
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Quote:
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You HAD to ask!!!!
Quote:
Originally Posted by rmb View Post
I almost replied... Then I saw who posted... LOL!

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post #8 of 16 Old 10-02-2014, 07:42 PM
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While we're at it, what's the best oil to use?

Spoiler:

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post #9 of 16 Old 10-02-2014, 08:01 PM
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Oh no you didn't.

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post #10 of 16 Old 10-02-2014, 08:05 PM
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I think winter is approaching.... Help us all!!!

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post #11 of 16 Old 10-02-2014, 09:32 PM
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I think winter is approaching.... Help us all!!!
Winter?

What's that?

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post #12 of 16 Old 10-03-2014, 02:39 AM
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Quote:
Originally Posted by Satch View Post
I have a question and I think you can help me.

I want to change the exhaust pipes and do not mind the brand, material or sound. All of that is secondary to me ... I want the best exhaust pipes in relation to performance.

I think that brands like Mivv, Delkevic etc ... will not win performance but may itself with Yoshi, Akra ...?

Thanks!
Out of all the systems I tried, and I would be happy to post pictures of them all, the old school Kerker 4-2-1 make the best street power and was very maintenance/ground clearance friendly.






If you can find a NOS Kerker system, I'd recommend it.

The 919 has other issues that will prevent maximum power, not what Honda engineered it to be. The Kerker seems to compliment the stock design - which probably means it sucked on the 900RR

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post #13 of 16 Old 10-03-2014, 05:00 AM
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Quote:
Originally Posted by rickard919 View Post
While we're at it, what's the best oil to use?
Olive oil?

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post #14 of 16 Old 10-03-2014, 05:27 AM
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Quote:
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Olive oil?
What about good old Kansas grown sunflower oil?

Huh?

Peanut oil might be a close second.....

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post #15 of 16 Old 10-03-2014, 06:13 AM
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Quote:
Originally Posted by Satch View Post
Sure! One option is the 900RR conversion but do not want to lose low and mid range. I also think the dual exhaust is the hallmark of this bike ...

I think the first thing I'll do is buy a splitter exhaust pipe (I will not win more hp but I will win more fun )

Posibly I decide for Yoshi although I've read that (at least in Europe) is not legal for road use. Someone knows the reason? Gases or noise?

Thanks!
Almost all (if not all) aftermarket exhaust pipes are marked "for off road use only" or "for track use only" That way they don't have to bother with getting approved by the DOT (or whatever the comparable organization would be in europe)

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post #16 of 16 Old 10-03-2014, 06:24 AM
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Quote:
Originally Posted by Steve View Post
What about good old Kansas grown sunflower oil
That would be an idea but I can't find it in MD (like you could not find it during communism in Romania )

Quote:
Originally Posted by Steve View Post
Peanut oil might be a close second.....
That was my second choice

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