Weight Reduction

[Capo]

Just finished fitting the magnesium bits I collected at WDW.

As I now have a scale, Ill bore you on this sunday morning with some figures.

The magnesium hub is 495gms lighter than the OEM item.

The AEM magnesium sprocket carrier, 520 44T sprocket, drive plate and titanium cush drives are 564gm lighter than the STM equivalent using OEM cush drives which in itself must be considerably lighter that the OEM 525 steel item.

Taking into account the savings from the forged magnesium wheels and the Pilot Pure tire, the reduction of the rotating rear wheel weight is in the region of 3kg.

A 104 link DID 520VM chain is 426gm lighter than its 525 equivalent.

A AFAM 'lightweight' 15T 520 front sprocket is 56gm lighter than the 525 OEM eqivalent.

The RCS titanium spring is 420gm lighter than the Ohlins equivalent, 50% of this can be considered unsprung.

Soo the total reduction of unsprung weight over standard is about 4kg of this, 3kg is rotating.

I would estimate the total weight of the bike (with battery and all fliuds no fuel) to now be around the 165kg mark.

[Pomp1]

Getting there, getting there:)..Interesting you're going for the 520 chain.

[slob]

Only another 40kg to go then

[AndyP]

I just changed a used (2mm tread) 2CT front for a new Pure and in an unscientific spring balance weight check the Pure was at least 200g heavier. Even allowing for tread wear I wasn't expecting that.
I think Michelins Lite Tyre claims relate more to other brands.

[seby]

Capo 165 is very hard and expensive to reachvas target for a 4 v liquid cooled bike

[Capo]

Capo 165 is very hard and expensive to reachvas target for a 4 v liquid cooled bike

Tell me about it.

I working with Alberto to make a caliper plate to suit a 220mm disc, I have an ALTH 220mm item that is 330gm lighter that the OEM 240mm disc. Again rotating and unsprung.

[seby]

Basicly yours is a 916 rear disc or similar

Anyway rear subframe in alloy, new single seat ( oem one is 2.7 kgs)

new clock unit

Rmake of all electric wire

no ignition key unit

No vapor oil circuit

carbon airbox

single can titanium exhaust

[Capo]

Yes the 916 disc is 220mm.

I would be real interested in a carbon fibre airbox.

[seby]

Actually I know a guy who had his for a 2v
the 4 v one is different on the bottom
so not sure if possible to have one who fit yours

be aware that the one who you find around are a mix of carbon and vtr
always ask for the weight

[Capo]

For sure they are diferent on the bottom, I just thought you qre getting one made and that your maker could alter the bottom for the 4V.

I've never seen one for sale, the was a guy in spain who made one for a 4V

[seby]

this is the one for the 2 v
http://www.ducatimonsterclub.it/index.php?option=com_smf&Itemid=101&topic=32787.msg1324079#msg1324079

is not in production...
you need to ask to Alberto, if someone is able to do for a 4 v

[mintyhit]

Why not save the money and just go on a savage diet? :)

[CK & AK]

Capo 165 is very hard and expensive to reachvas target for a 4 v liquid cooled bike

Not necessarily..... ;)

Have had to do this to our racebikes, the 1098 is lighter than the M800 now :cool:

[Panther]

I was having a little think :dizzy:

I don't know if it's possible,

-could you change the battery of a lighter one?

-the stock headlight is quite heavy, any way of reducing the weight of this and still getting the same look? maybe there are some lighter after market ones???

[Panther]

Fill your tyres with Helium

Some wrote this on the net
'It is true that the US Olympic cycling team used helium in their tires during 1984. This may have been just for tracking sprinting bikes. When news of this spread, scientists quickly calculated that the benefit was too small to be measurable in a racing situation.

You can also save weight by shaving your head, but no one actually does that.'

[Capo]

I was having a little think :dizzy:

I don't know if it's possible,

-could you change the battery of a lighter one?

-the stock headlight is quite heavy, any way of reducing the weight of this and still getting the same look? maybe there are some lighter after market ones???

I have a small Yuasa battery, thinking about going to a Lithium Fe, but i've been hearing not so good things about them.

There is a carbon fibre headlamp bucket available but the glass itself weighs a bit, I have heard that later models use a plastic glass which is lighter.

[Saint aka ML]

Capo get titanium engine bolts, swing-arm axis and rear/front wheel one. Ditch stock light for something new and lighter.

Also magnesium engine cases but get corse style clutch one. Lighter flywheel, titanium clutch basket and light alloy hub.
You could also go all the way and get someone to make you a titanium/light alloy frame. I seen one on ebay which was 30% of weight of stock one and much stronger.

[seby]

capo 695 and s4rs headlight are lighter than yours
due is plastic not glass

i do not agree about 1098 vs s4r

its like compare apples and oranges ;)

2v st2 engine is 5/6 kilos heavier than 904 engine ;)

[CK & AK]

Orange is nice Seby
;) :D

CK

[utopia]

Always take a dump before scratching........multiple benefits, costs no more than a penny.

[Pomp1]

The Lithium battery are probably OK in the UK climate, although you may want to reposition it away from any heat source(as we discovered in Misano:)) the weight reduction is incredible though!
Blandits use plastic lenses too, so you might want to take a look at them.
New wiring harness is a very good idea..

[Capo]

The Lithium battery are probably OK in the UK climate, although you may want to reposition it away from any heat source(as we discovered in Misano:)) the weight reduction is incredible though!
Blandits use plastic lenses too, so you might want to take a look at them.
New wiring harness is a very good idea..

Yes it was the Misano experience that has caused me some doubt, I plan to get some of that temperature indicating tape, the upper limit on these batteries is 70C.

[Capo]

Always take a dump before scratching........multiple benefits, costs no more than a penny.

The bogs at circuits have not changed much over the years, they still stink to the point where I will not venture inside.

[seby]

single can Ti exhaust... loads of weight reduction
http://img161.imageshack.us/img161/3971/dsc0771hs1.jpg
http://img383.imageshack.us/img383/5421/dsc075901bi2.jpg
http://img367.imageshack.us/img367/9720/dsc0778mh6.jpg
http://img367.imageshack.us/img367/8937/dsc0798lz1.jpg

[seby]

Ti or Alloy subframe

http://img238.imageshack.us/img238/290/immagine278on4.jpg
http://img15.imageshack.us/img15/7042/01042009153.jpg

[morty]

Take a look at www.racingbatteries.co.uk - That should save you a couple of kilos !