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Motorcycle Forum / General / Sportbikes / December 2005



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Larry xlax Lovisone - 22 Dec 2005 18:47 GMT
Oh what fun it is to shop Ebay... especially when you win an $2000 HRC Swingarm
for $214 delivered... Merry Christmas Mr.RC45... What under the tree for your
bike???
http://www.fox302.com/userdata/netters2/files/ShopPics/Mr.RC45HRCSwingarm.JPG

Larry L
94 RC45 #2
Have a wheelie NICE day...
Lean & Mean it in every corner of your life...
If it wasn't for us the fast lane would rust...
V4'S are music to the seat of my pants...
1952 De Havilland Chipmunk...
Yank and bank your brains loose...
http://members.ebay.com/aboutme/-xlax-/
http://home.comcast.net/~netters2/
http://www.fox302.com/index.pl?s=vg&user=netters2
http://www.reeky.org/gallery/xlax
Rayvan - 22 Dec 2005 18:55 GMT
> Oh what fun it is to shop Ebay... especially when you win an $2000 HRC Swingarm
> for $214 delivered... Merry Christmas Mr.RC45... What under the tree for your
> bike???
> http://www.fox302.com/userdata/netters2/files/ShopPics/Mr.RC45HRCSwingarm.JPG

Nice deal, but what's the benefit over the stock one. Lighter?
Stronger? Both?
Larry xlax Lovisone - 22 Dec 2005 21:28 GMT
> Nice deal, but what's the benefit over the stock one. Lighter?
> Stronger? Both?

There are many HRC kit swingarms however what they share in common is a
different attach point for the
pro link arm and double titanium pinch bolts... this affords the shock a more
one to one ratio for rigors of
WSB racing... I'll have to complete an engineering study... with the help of
Tony Foale's book... in order to
know what to machine for the successful mating of my current Ohlins...

The holy grail of HRC swingarms are 98 to 99 models which are gold in color
because they are cast
Magnesium which weights in at only 8.2 pounds... mine is unfortunately a 96 made
out of aluminum... so it
weights 11.8 pounds or about the same as stock... so no weight savings this
time...

I'd sheets m' drawers if I ever came across an genuine HRC magnesium swingarm...
I keep a special fund on
standby just in case...

HRC twin bolt...
http://www.fox302.com/userdata/netters2/files/ShopPics/HRCSwingarm.JPG

Stock RC45 single bolt...
http://home.comcast.net/~netters2/pics11-3-03/bigimages/RC45NL5AxleModSide.JPG

Larry L
94 RC45 #2
Have a wheelie NICE day...
Lean & Mean it in every corner of your life...
If it wasn't for us the fast lane would rust...
V4'S are music to the seat of my pants...
1952 De Havilland Chipmunk...
Yank and bank your brains loose...
http://members.ebay.com/aboutme/-xlax-/
http://home.comcast.net/~netters2/
http://www.fox302.com/index.pl?s=vg&user=netters2
http://www.reeky.org/gallery/xlax
Chip - 27 Dec 2005 20:48 GMT
> The holy grail of HRC swingarms are 98 to 99 models which are gold in
> color because they are cast
> Magnesium which weights in at only 8.2 pounds... mine is unfortunately a
> 96 made out of aluminum... so it
> weights 11.8 pounds or about the same as stock... so no weight savings
> this time...

Okay, not to put a damper on a great buy, but really, what does 3.6 pounds
gain you? You could get on the treadmill, and take a dump, and that will get
you 3.6 pounds.

I just don't understand the quest to shave off 3.8 oz through titanium
bolts....
P.Roehling - 27 Dec 2005 22:34 GMT
> Okay, not to put a damper on a great buy, but really, what does 3.6 pounds
> gain you? You could get on the treadmill, and take a dump, and that will
> get you 3.6 pounds.
>
> I just don't understand the quest to shave off 3.8 oz through titanium
> bolts....

If it was just 3.8 oz. it wouldn't make any difference. But by the time you
go through every part on the bike with a view towards saving weight, it can
add up to a significant weight difference. *Especially* if it's unsprung
weight that you're saving!

Pete
Ript - 28 Dec 2005 00:17 GMT
>> The holy grail of HRC swingarms are 98 to 99 models which are gold in
>> color because they are cast
[quoted text clipped - 9 lines]
> I just don't understand the quest to shave off 3.8 oz through titanium
> bolts....

The ones that go the last mile, are the lightest, and fastest. But if hes
not racing, then yea...

Signature

1984 RZ350

Larry xlax Lovisone - 28 Dec 2005 09:19 GMT
> Okay, not to put a damper on a great buy, but really, what does 3.6 pounds
> gain you? You could get on the treadmill, and take a dump, and that will get
> you 3.6 pounds.

Up side of reducing the weight of your suspension components... is that it will
allow the suspension to react quicker to the surface irregularities... the down
side is a harsher ride...  and I would gladly trade comfort for control any
day...

Larry L
94 RC45 #2
Have a wheelie NICE day...
Lean & Mean it in every corner of your life...
If it wasn't for us the fast lane would rust...
V4'S are music to the seat of my pants...
1952 De Havilland Chipmunk...
Yank and bank your brains loose...
http://members.ebay.com/aboutme/-xlax-/
http://home.comcast.net/~netters2/
http://www.fox302.com/index.pl?s=vg&user=netters2
http://www.reeky.org/gallery/xlax
Rob Kleinschmidt - 28 Dec 2005 22:07 GMT
> > Okay, not to put a damper on a great buy, but really, what does 3.6 pounds
> > gain you? You could get on the treadmill, and take a dump, and that will get
[quoted text clipped - 4 lines]
> side is a harsher ride...  and I would gladly trade comfort for control any
> day...

Couldn't you get the same improvement in sprung to unsprung weight
by just increasing the sprung weight of the bike and/or rider ?

I think this is the approach that Harley took.
Larry xlax Lovisone - 22 Dec 2005 21:33 GMT
> Nice deal, but what's the benefit over the stock one. Lighter?
> Stronger? Both?

There are many HRC kit swingarms however what they share in common is a
different attach point for the pro link arm and double titanium pinch bolts...
this affords the shock a more one to one ratio for rigors of racing... I'll have
to complete an engineering study... with the help of Tony Foale's book... in
order to know what to machine for the successful mating of my current Ohlins...

The holy grail of HRC swingarms are 98 to 99 models which are gold in color
because they are cast Magnesium which weights in at only 8.2 pounds... mine is
unfortunately a 96 made out of aluminum... so it weights 11.8 pounds or about
the same as stock... so no weight savings this time...

I'd sheets m' drawers if I ever came across an genuine HRC magnesium swingarm...
I keep a special fund on standby just in case..

HRC twin bolt...
http://www.fox302.com/userdata/netters2/files/ShopPics/HRCSwingarm.JPG

Stock RC45 single bolt...
http://home.comcast.net/~netters2/pics11-3-03/bigimages/RC45NL5AxleModSide.JPG

Larry L
94 RC45 #2
Have a wheelie NICE day...
Lean & Mean it in every corner of your life...
If it wasn't for us the fast lane would rust...
V4'S are music to the seat of my pants...
1952 De Havilland Chipmunk...
Yank and bank your brains loose...
http://members.ebay.com/aboutme/-xlax-/
http://home.comcast.net/~netters2/
http://www.fox302.com/index.pl?s=vg&user=netters2
http://www.reeky.org/gallery/xlax
Rayvan - 23 Dec 2005 00:51 GMT
> > Nice deal, but what's the benefit over the stock one. Lighter?
> > Stronger? Both?
[quoted text clipped - 12 lines]
> I'd sheets m' drawers if I ever came across an genuine HRC magnesium swingarm...
> I keep a special fund on standby just in case..

I'm surprised you haven't machined your own magnesium swingarm in the
BLS yet!
--
Rayvan
Stephan Rose - 23 Dec 2005 11:59 GMT
>> > Nice deal, but what's the benefit over the stock one. Lighter?
>> > Stronger? Both?
[quoted text clipped - 15 lines]
>I'm surprised you haven't machined your own magnesium swingarm in the
>BLS yet!

I was thinking the same thing!!!

Come on larry, I am dissapointed now!!! =)

I would be happy to make the model for ya ;)
Rich - 23 Dec 2005 00:55 GMT
>>Nice deal, but what's the benefit over the stock one. Lighter?
>>Stronger? Both?
[quoted text clipped - 12 lines]
> I'd sheets m' drawers if I ever came across an genuine HRC magnesium swingarm...
> I keep a special fund on standby just in case..

Is it a good idea to put a hunk of magnesium so close to an engine?

Could you achieve similar weight savings with titanium?
Larry xlax Lovisone - 23 Dec 2005 02:24 GMT
> Is it a good idea to put a hunk of magnesium so close to an engine?
>
> Could you achieve similar weight savings with titanium?

There have been a number of successes producing whole engines out of
magnesium...

Titanium piece that size would be prohibitly expensive even for Honda...

Larry L
94 RC45 #2
Have a wheelie NICE day...
Lean & Mean it in every corner of your life...
If it wasn't for us the fast lane would rust...
V4'S are music to the seat of my pants...
1952 De Havilland Chipmunk...
Yank and bank your brains loose...
http://members.ebay.com/aboutme/-xlax-/
http://home.comcast.net/~netters2/
http://www.fox302.com/index.pl?s=vg&user=netters2
http://www.reeky.org/gallery/xlax
Robert Striemer - 23 Dec 2005 05:31 GMT
Strictly speaking magnesium-aluminum alloy - about 2/3 the weight of real
aluminum. (Aluminium in the UK and other parts of the Commonwealth)

I believe the titanium we see more and more of is also alloyed with aluminum
but I could be wrong.

As for machining magnesium alloys - best left to the experts :)

Rob

>> Is it a good idea to put a hunk of magnesium so close to an engine?
>>
[quoted text clipped - 17 lines]
> http://www.fox302.com/index.pl?s=vg&user=netters2
> http://www.reeky.org/gallery/xlax
Steve - 23 Dec 2005 05:38 GMT
>>>Nice deal, but what's the benefit over the stock one. Lighter?
>>>Stronger? Both?
[quoted text clipped - 16 lines]
>
> Is it a good idea to put a hunk of magnesium so close to an engine?

Hehe... most aviation turboshaft/turboprop engines have magnesium gear
boxes... so, yeah... it's no biggie...

> Could you achieve similar weight savings with titanium?

Not practically.  Ti6-4 isn't lighter than Aluminum 7075.  It's 66%
heavier while being about twice as strong.  It's also expensive, and MUCH
harder to work with, plus it has a terrible tendency for galvanic
corrosion and sensitivity to heat treatment.

Signature

Steve Keith - in reverse order of procurement:
2003 GSXR750 - Track Queen
2002 Blue Daytona - Retired from track duty after low-side
1983 GS1100ED (GS2) - eBay, rode it to PHX from San Jose via the PCH -
sweet!
1993 GSX1100F Fat Kat
1983 GS1100ED (GS1)
My wife says:  "Buell rhymes with Stool"

Stephan Rose - 22 Dec 2005 19:00 GMT
>Oh what fun it is to shop Ebay... especially when you win an $2000 HRC Swingarm
>for $214 delivered... Merry Christmas Mr.RC45... What under the tree for your
>bike???
>http://www.fox302.com/userdata/netters2/files/ShopPics/Mr.RC45HRCSwingarm.JPG

Hahaha nice pic!!! I like that =)
Mike - 22 Dec 2005 19:44 GMT
>Oh what fun it is to shop Ebay... especially when you win an $2000 HRC Swingarm
>for $214 delivered... Merry Christmas Mr.RC45... What under the tree for your
>bike???
>http://www.fox302.com/userdata/netters2/files/ShopPics/Mr.RC45HRCSwingarm.JPG

Nothing. The Buell is perfect just the way it is.:-) $2000.00 swing
arm?  Come on Larry.  that piece is no nicer than the one Erik
designed fpr the Cyclone.:-)

Regards

Mike
 
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