Swingarm weights

Message

BenWah · #1 Post by **BenWah** » Tue Sep 21, 2010 3:29 pm

Does anybody have measured weights for both the Falco swingarm and the early curvy RSV swingarm?

I'm working out whether or not to use the Mille swingarm in the Falclimber or not.

TIA

B

kiwi_rsvr · #2 Post by **kiwi_rsvr** » Tue Sep 21, 2010 6:55 pm

Somewhere in the region of 5.2kg's the later 2004 version is 4.8 kg's

BenWah · #3 Post by **BenWah** » Tue Sep 21, 2010 9:01 pm

kiwi_rsvr wrote:Somewhere in the region of 5.2kg's the later 2004 version is 4.8 kg's

Is that the rsv arm? Any idea on the falco arm?

B

Falcopops · #4 Post by **Falcopops** » Wed Sep 22, 2010 4:12 am

I knew I'd seen it somewhere and I had!

both are 5.6kg according to D-Rider.

https://www.ridersite.com/viewtopic.ph ... t&start=16

Aladinsaneuk · #5 Post by **Aladinsaneuk** » Wed Sep 22, 2010 5:44 am

nod

both same weight iirc as well

there was an absolute shit fest over on af1 - most of us consider the mille arm a bling upgrade only - some one over there was adamant that there was a performance difference between the two and the mille one was superior....

Falcopops · #6 Post by **Falcopops** » Wed Sep 22, 2010 6:39 am

just looking at the difference in the ammount of metal it's surprising the RSV arm isn't heavier

kiwi_rsvr · #7 Post by **kiwi_rsvr** » Wed Sep 22, 2010 6:46 am

The Mille swingarm looks massive but it is very thin walled (hence a ding in the swingarm will write them off), they were designed for racing and so the shape gives rigidity and strength while being as light as could be achieved, well back then the technology was top drawer, 10 years on things have changed but I still think visually its one of the best.

BenWah · #8 Post by **BenWah** » Wed Sep 22, 2010 8:27 am

Looks like the Mille arm I have will be going in then - it means I don't have to modify the exhaust I have (with a hammer) to make clearance for the falco swingarm at full suspension extension.

I didn't want a weight penalty though.

Sweet.

kiwi_rsvr · #9 Post by **kiwi_rsvr** » Wed Sep 22, 2010 10:31 am

Compensate with Titanium axles, nuts and bolts

BenWah · #10 Post by **BenWah** » Wed Sep 22, 2010 10:34 am

kiwi_rsvr wrote:Compensate with Titanium axles, nuts and bolts

Can't do that. The whole point of this bike is that it needs to be cheap racing. Everything on it is secondhand (mostly from eBay, as was the bike itself) and there's no budget for fancy metals - especially Ti axles!

If the RSV arm is the same weight as the Falco then it goes on!

B

kiwi_rsvr · #11 Post by **kiwi_rsvr** » Wed Sep 22, 2010 11:05 am

point taken

BenWah wrote:
kiwi_rsvr wrote:Compensate with Titanium axles, nuts and bolts
Can't do that. The whole point of this bike is that it needs to be cheap racing. Everything on it is secondhand (mostly from eBay, as was the bike itself) and there's no budget for fancy metals - especially Ti axles!

If the RSV arm is the same weight as the Falco then it goes on!

B

D-Rider · #12 Post by **D-Rider** » Wed Sep 22, 2010 5:12 pm

Yeah - I was surprised when I weighed them that they were essentially the same.
Wouldn't claim the measurements to be fantastically accurate - weighing on bathroom scales has its limitations but at least they are decent electronic scales.

The advantage in the Mille arm is most of the weight is near the pivot point reducing the effective rotational unsprung mass ..... and it looks nice ....

HowardQ · #13 Post by **HowardQ** » Thu Sep 23, 2010 12:10 pm

D-Rider wrote:Yeah - I was surprised when I weighed them that they were essentially the same.
.......................

The advantage in the Mille arm is most of the weight is near the pivot point reducing the effective rotational unsprung mass ..... and it looks nice ....

Best excuse I've heard yet for fitting one!!

BenWah · #14 Post by **BenWah** » Thu Sep 23, 2010 12:32 pm

D-Rider wrote:Yeah - I was surprised when I weighed them that they were essentially the same.
Wouldn't claim the measurements to be fantastically accurate - weighing on bathroom scales has its limitations but at least they are decent electronic scales.

The advantage in the Mille arm is most of the weight is near the pivot point reducing the effective rotational unsprung mass ..... and it looks nice ....

The main thing for me is that I can run the RSV exhaust without having to install a bloody great ding for it to have clearance on the falco arm at full suspension extension. Looks alreet too!

Ooh, increased leverage on the swingarm weight (a reduced moment of inertia) - I can hardly weight! (geddit...?)

Bee Dubbya

BenWah · #15 Post by **BenWah** » Sun Sep 26, 2010 1:01 pm

I can reveal the differences in the weights of the Falco and RSV swingarms are as follows:

Falco swingarm including linkage - 5.96kg
RSV swingarm including linkage - 6.66kg

Measured on a digital hanging/fishing scale so pretty accurate. Thus the RSV swingarm is 700g heavier.

HTH

BW