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Cutting major weight off this bike is Just not that easy.. beside swapping to a lighter exhaust saving @ 7lbs if you go titanium header, BST wheels, pulling the pair/evap crap, removing the stock tail tidy and mirrors, not a lot for big number weight drop items. Not saying she needs a diet, but who doesn't like a 410lbs fully fueled 175-180rwhp streetbike.
 

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If you go with your mods listed, plus carbon air box, carbon throttle bracket, replace literally every accessible bolt/nut with aluminum or titanium (switch gear screws included, everything!), titanium axles, titanium engine mount bolts, and a titanium swingarm pivot bolt you can get it under 400 down to 397lbs. So yeah, 397lbs with 182whp/105wtq makes for an exciting ride EVERY time. The Big Dog 1198 isn't very forgiving though. You best be ready and committed to ride when you twist the throttle. If you get behind it, at all, even for a millisecond or two, it will jump up and bite hard. (Yes I'm old and I know these things...)

That's why I love it so much. It is the grim reaper with a seductively beautiful body and glorious sound... Yeah that's my Big Dog 1198SP Ducati.

The CBR SP is much more civilized for the masses. LOL It's still at 422lbs full up ready. I'm working on it though. No dyno runs for it yet...
 
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Discussion Starter #23
Tonight I pulled the rear wheel and replaced the brake rotor with the racing rotor and titanium bolts, then replace the sprocket nuts with the titanium ones.
Some random weights: rear axle 465 g, axle nut and washer 99.5 g, wheel spacers both L+R 57g, cush drive rubber bumpers 32 g each 190 g all, race brake rotor 448.5 g, stock rotor 745 g.
Stock sprocket 568g, drive hub only 966 g, Rear wheel rim and tire (stripped but w/ bearings) 24.7 lbs.
Been using a gel pad on the seat but on top of a hard seat it does do much good and it is heavy but adds and inch in seat height which is ok for my 6' frame, so I ordered a Luimoto SP race seat cover and gel pad. Hopefully it will extend ride time with comfort and remove that heavy gel pad, and look better doing it. :)
 

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Discussion Starter #25
So I looked up the weight of a Pirelli Diablo Super Corsa that my SP is equipped with and it is listed at 13.6 pounds which means the stock rim with bearings is approximately 11.1 pounds. So the weight of the stock rims is comparable to the Marchesini Aluminum rims of 18 pounds for the front/back pair, and I think the BST carbon fiber wheels are similar in weight. The Marchesini Magnesium wheels are 6 pounds lighter and MUCH more expensive than the AL ones and a bit more than CF, so they might be a good option even at the price.
It is interesting that the difference from the SP1 and SP2 was said to be a more efficient head and Marchesini wheels and a $4k price difference between the bikes and that is what the wheels cost.

BTW the failed wheel above looks like a rotobox.
Ride on.
 

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Discussion Starter #26
Friday I received the carbon fiber part that goes over the taillight, black plastic out CF in. Looks good.
While in there I decided to weight my new Yoshimura Fender A replacement. The stock A fender with license plate, light and turn signals was 2 pounds, the Yosh with license plate, light and turn signals is 1.2 pounds. So a small weight loss, good because it is up high and hangs out over the end of the bike, and it is a much cleaner looking tail.
Now waiting for the Luimoto SP race seat cover.
 

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Thanks for the update.. are you keeping all the weights and dimensions on a spreadsheet?
 

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Discussion Starter #28
Putting all that on a spreadsheet would be interesting, could make it add or subtract the weight difference for the bike, but I think I might have removed two or three pounds total from the bike so probably not worth the effort, at least it is documented here. The carbon fiber looks better than the plastic but is not really lighter except for large items like the front fender.
I am still thinking about the wheels, the Marchesini Magnesium wheels are the lightest I have seen, and might be five pounds total lighter than stock, which would be significant being that it is unsprung and rotating weight, but I am seeing different numbers on the manufacturer website vs some of the distributor websites. Some of the distributors have the names for the aluminum and magnesium, Kompe Vs Corse, different from the manufacturer, reversed, so not sure if the numbers can be trusted if they don't know the product.
The stock wheels might be 20 pounds for both subtracting the tire weight given by the tire manufacturer but can't be sure until I wear out this set of tires and have them dismounted.
Decisions, Decisions. Would be an easy choice if they didn't cost so damn much.;)
 

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Some of the distributors have the names for the aluminum and magnesium, Kompe Vs Corse, different from the manufacturer, reversed, so not sure if the numbers can be trusted if they don't know the product.
Ok quick thing on wheels... the SP 2 wheels for example are not true Marchesinis M7RS genesi wheels. they are like the zx-10rr type marchesini, not taken from a forged block of aluminum then machined down, also has 6 bolt rear sprocket hub, not 5 like aftermarket.. aftermarket are about 2 lbs lighter than the stock SP 2.
And with that being said, the OZ gas 6 spoke wheels are lighter than the marchesini aftermarket wheels.

The marchesini M10RS corse (10 spoke magnesium), depending on the bike the wheel is not that much lighter than a stocker on SOME bikes.. front wheel is typically 7lbs even with wheel spacers, and the back for a double sided swingarm arm is 9.5lbs spacers, but no sprocket or rotor.

BST has continued to be the lightest out there with either the 5 spoke or 7 spoke mamba slightly heavier. I have not had the pleasure of having a set of the new bst verison, they are kinda ugly IMO..

For me SP 2 i am more than likely going OZ gass RS A, since it will be for street and track
 

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Discussion Starter #30
So today I talked to Stephano at Motowheels, he carries BST, Marchesini, and OZ, he said if I wanted the lightest wheel then the OZ Cattiva are lighter than the Marchesini and BST and are priced between the two. With front wheel at 6 lbs and rear at 9 lbs with the sprocket carrier. They come in an anodized gold which matches the bike and look nice. The only down side, other than cost :), is the lead time of 12 weeks as they are made to order. So something to think about.
 

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So today I talked to Stephano at Motowheels, he carries BST, Marchesini, and OZ, he said if I wanted the lightest wheel then the OZ Cattiva are lighter than the Marchesini and BST and are priced between the two. With front wheel at 6 lbs and rear at 9 lbs with the sprocket carrier. They come in an anodized gold which matches the bike and look nice. The only down side, other than cost :), is the lead time of 12 weeks as they are made to order. So something to think about.
Yeah i deal with Stephano for most of my wheel needs, typically BST or OZ,..
The downside with magnesium, especially a lighter race wheel like the cattiva they are not so great for street bikes where you have potholes, junk in the road and possibly abrupt edges.. and of course if and or when you get chips, the magnesium does not respond well to the contact with oxygen if i recall (bad things happen) not worth the hassle if your keeping them a long time. I am fine with some OZ gas forged aluminum, durable, lighter than stock or SP 2 wheels, and no concerns about them getting nicks, chips, scratches or exploding like rotobox.
 

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Discussion Starter #32
I checked the Motowheels website and found that the OZ forged aluminum wheels are not much heavier than the magnesium, about 1 pound for the front wheel at 7.1 pounds. And for the money difference I can live with a bit more weight. :)
 

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I checked the Motowheels website and found that the OZ forged aluminum wheels are not much heavier than the magnesium, about 1 pound for the front wheel at 7.1 pounds. And for the money difference I can live with a bit more weight. :)
More significant is that the weight savings is at the furthest most point from the center of rotation (the rim versus the hub). A pound of weight savings at the hub would be nice, but the further outward, the more important the weight savings is. Rotational weight is often said to be on the magnitude of seven times more important than static weight. The further the weight is from the center of rotation, the more significant it is.

San
 

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Vender - The SC77 Specialist
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Trying to shave weight with Ti fasteners requires a commitment.
In time and money. Total weight shaved by serious Ti commitment is about 4lbs total.

These 2 bags represent a switch to Ti bolts for all practical fasteners on an SC77.

Original


Ti


Still absent are the Ti engine bolts.
They are represented int he picture below.
This is a stock SP2 motor vs a WSB build using all Ti fasteners internally and externally where applicable.
 
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