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Buell Forum » XBoard » Buell XBoard Archives » Archive through August 07, 2006 » Aftermarket exhaust against the "trilogy of tech"? « Previous Next »

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Fenderacoustic
Posted on Saturday, August 05, 2006 - 06:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Most of the aftermarket exhausts are considerably lighter than the factory exhaust. By switching to such an exhaust you are effectively raising the center of gravity on the bike. I was wondering what effect this would have if any. I'm guessing not much as most people I see post on here have aftermarket exhaust. My bike is bone stock right now and I love how it handles. I realize that we're only talking about like 10 lbs here, but I'm still curious none the less. Any feedback?
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Altima02
Posted on Saturday, August 05, 2006 - 09:45 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

=less unsprung weight.
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Theshue
Posted on Saturday, August 05, 2006 - 10:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

not guite right there altima. unsprung weight is your wheels, tires and brakes. where as anything on the frame side of the bike is sprung weight.
to my understanding fender, any weight saving you can accomplish is a benefit. less weight = better acceleration, and most likely better handling.

matt
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Pwnzor
Posted on Saturday, August 05, 2006 - 10:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

if anything, my bike handles better than it ever did before. Less is more!

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Buell920
Posted on Saturday, August 05, 2006 - 10:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Theshue your also no quite right.

the exht does have a small effect on the center of gravity. think of your bike as a pendulum with the most weight low. if you remove a small amount from the lowest point it effects the rate of swing. (handling) will the avg rider notice NO! but in a very small way it can effect it.
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Speedfreaks101
Posted on Saturday, August 05, 2006 - 10:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I can comment on this. When I installed my Jardine I did not even consider any difference in handling, just looking for power. When I took it for the maiden voyage the first thing I noticed before I ever hit riped the throttle was that the bike seemed to fall in faster. I did not notice any other changes in the bikes handling.

Just my experience,
Bart
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Pwnzor
Posted on Saturday, August 05, 2006 - 10:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

does have a small effect on the center of gravity.

You are correct, in this case it happens to be a good and desirable effect.

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Nasty73z
Posted on Saturday, August 05, 2006 - 11:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I also think that my bike handles better with the Jardine muffler. You are talking about a very small percentage of the overall weight of the bike, I think it falls in faster and is much more "flickable" with the exhaust. The Jardine is the lightest weight muffler though, the Drummer/Micron system weigh more than twice it.
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Xring
Posted on Saturday, August 05, 2006 - 11:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I think the mistaken assumption is that having a low center of gravity on a motorcycle is always better. May be true of autos, but not bikes.

The "trilogy of tech" refers more to centralizing mass away from the ends, not toward the bottom.

I agree that lighter=better.

Good luck,
Bill
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Dtx
Posted on Sunday, August 06, 2006 - 01:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Small thread hijack...

Nasty73z - I see you are in Stillwater. I am over in Tulsa. There sure aren't very many Buell riders in Oklahoma. I ran into Walter (aka "Buddy", who rides a blue R6) and he said he knew you. I guess he went to school with you over there at OSU. He is in Tulsa now. Small world...

I am getting some Buell riders together over here in Tulsa if you wanna come check it out. Let me know!
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Grimel
Posted on Sunday, August 06, 2006 - 09:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Buell920,

If you think of your bike as a pendulum, removing weight at the bottom removes weight from the pivot point. That allows the bike to swing faster. Less mass at the pivot point allows the IIRC 3rd class lever to move it quicker with the same amount of force.

I do agree the average rider won't ever notice the difference.
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