Headlight glass and cowl weight quite much so you can definitely loose few pounds going that direction... Also a Ti swingarm will be a nice addition to this project!!!

Like others have said, at this point the largest amount of weight you will be able to take off is in the rear suspension.  The issue is going to be finding a lighter setup that will still use the wheel & shock you all ready have.  A double sided swingarm will be lighter, but would not be compadable with your wheel.  There are lighter single sided swingarm options for the super bikes but those would not be compadable with the engine cases with out modification or the rear suspension.  The lightest option I can think of would be a SS swingarm with the shock mount on the rear valve cover of the engine.  That would loose the shock linkage, and give a lighter swingarm.

Quote from: Skybarney on June 30, 2014, 11:34:26 AM
90lb. girlfriend.

If you know of one, send her my way!  

Quote from: Düb Lüv on June 30, 2014, 07:16:56 PM
I'm sure a lot of weight can be saved if there's an alternative to that boat anchor swing arm.

But it's so cool-looking    I'm willing to make some compromises for aesthetics.

Quote from: memper on June 30, 2014, 04:59:08 PM
Would budget allow cf wheels?

Not anymore, or at least for a while.  But even if it did, I just don't like the looks of them.  The Mambas are ok, but you can only have them in a 6" version, and while they will fit, you'd have to go with a bigger tire.  

Quote from: Scoober1103 on June 30, 2014, 05:50:09 PM
Change out the Marchesinis for OZ piega forged alloy, there a bit lighter and research some tyre changes as someone posted. Some weight can be shaved of them. Definitely a Ti frame for the ultimate weight loss program!

I like the look of the ten spoke Marchesinis, so I'm going to stick with those.  Tire weight is definitely something to look into; Pirelli made some really light tires, but they discontinued them    I'm surprised that tire makers haven't been bit by the weight weenie bug - it's a real selling point when you consider how much a light tire could positively change the dynamics of a bike.  

Quote from: memper on July 01, 2014, 04:50:13 PM
What's the worries with mag wheels?

Maintenance - if they get damaged (nicks, scrapes, etc. beyond the paint), mag wheels corrode pretty quickly.  

Quote from: Düb Lüv on June 30, 2014, 07:21:51 PM
Don't forget the lightened and polishing rockers from kaemna.

Your thread is giving me a lot of great ideas.  How much weight do you think can be lost from the engine using all the tricks in the book?  10lbs?  12lbs?  

Quote from: xcaptainxbloodx on July 01, 2014, 02:18:12 PM
quit playing around and get serious

http://motowheels.com/i-8591367-doug-cook-superlight-titanium-frame.html

If I went that route, I'd get one from Stradafab - his work is absolutely amazing.  That being said, I don't want the hassle of trying to title and insure an aftermarket frame.

Quote from: Buckethead on June 29, 2014, 07:19:34 AM
And I don't know what, if anything, ever happened to it, but at one point Duc Stu was working on an aluminum rear subframe. Required chopping the frame just aft of the motor.

I wish that was still available - I'd definitely consider it.  

Quote from: Metzis on July 04, 2014, 01:36:17 AM
Headlight glass and cowl weight quite much so you can definitely loose few pounds going that direction... Also a Ti swingarm will be a nice addition to this project!!!

The bike had the plastic lens stock, which weighs a lot less than the glass ones.  I'd like a CF headlight bucket, but they don't make one to replace the plastic buckets, only the steel, and they aren't compatible (I tried).  I did source a U bracket from a single brake bike, which is a little lighter than the two brake U brackets. 

As far as bodywork is concerned, I've deleted the front cowl, chain guards and fenders, and have a CF seat cowl.

Let us know asap when you weigh the bike .

Quote from: koko64 on July 06, 2014, 03:49:05 PM
Let us know asap when you weigh the bike .

As soon as I get the kevlar tank from ETI mounted, I will.  That being said, I am curious how much weight the ETI tank will save, as my bike already had a plastic tank (which I assume is much lighter than the steel tanks?).  I know the ETI tanks are about 8lbs lighter than the steel stock tanks; as long as the ETI tank saves me > 4lbs, I'll consider it money well spent.  

I'm kicking myself for not keeping a running list of stock vs. aftermarket weight differences - it would have been a great resource for the community. 

As I replaced worn parts, I weighed them and the replacement parts and recorded the difference.  According to my list I dropped 30-35 lbs (approx15kgs) without getting radical. Not bad.

My bike is an old model and not  relevant to your quest, but some items made a large difference. Battery 5kg, pipes 3kg, clutch 2kg, flywheel 1 kg, Penske shock over 1kg, Ohlins springs 500gms, carbon seat cowl 850gms, carbon guard 500gms! I didnt realise how heavy some plastics were.

Some items just yielded slowly accumulated weight savings. lightweight sprockets, trimmed airbox/battery box, alloy/Ti bolts, carbon bolts, tail tidy, "snowflake" rather than "pizza" discs, trimmed handle bars, trimmed coil
bracket , etc

Plastic tanks with the flange and all internals mounted actually are heavier than a steel tank with the pump and filter installed.

How about that. I didn't know that DP. I always thought the plastic tanks were  lighter.

Quote from: Akechi on July 06, 2014, 03:42:59 PM


I wish that was still available - I'd definitely consider it.  

I know where the only prototype for this ALU sub-frame is, for the record.  Not sure if the owner is willing to part with it, though. 

Hey Akechi, don't still have the headlight bracket for a twin disc bike do you?

Quote from: koko64 on July 08, 2014, 06:41:59 AM
How about that. I didn't know that DP. I always thought the plastic tanks were  lighter.

I didn't either - it's good to know.  It's like how I assumed Ti hardware would be lighter than aluminum, but more often than not, it isn't.  

Quote from: DucatiBastard on July 08, 2014, 03:00:56 PM

I know where the only prototype for this ALU sub-frame is, for the record.  Not sure if the owner is willing to part with it, though.  

Is it installed?  Do you know how much weight is saves?  

Quote from: Nibor on July 08, 2014, 03:48:24 PM
Hey Akechi, don't still have the headlight bracket for a twin disc bike do you?

Unfortunately no - I sold it 

Someone may have mentioned them, but Ti engine to frame studs from TPO.

Quote from: koko64 on July 09, 2014, 04:25:39 AM
Someone may have mentioned them, but Ti engine to frame studs from TPO.

On order, as are front sprocket screws    At this point, nearly fastener not related to the motor that can be Ti and should be Ti is Ti.  Where aluminum is lighter, it's aluminum.  The only thing not upgraded are the front pinch bolts, as I can't find anyone who makes Ti pinch bolts for Ohlin R&Ts.  

I think I've cut all the weight I can without going into the motor, changing the frame, or running CF wheels.  This winter I'll do the motor and rewire.  

Please weigh the bike and end the suspense.

Quote from: koko64 on July 09, 2014, 06:41:19 PM
Please weigh the bike and end the suspense.

I need to install:

1.  EFI tank
2.  TPO motor mounts, sprocket screws
3.  Motowheels clipons
4.  Aftermarket ride height adjuster (don't know which one yet)

When that's done, that will be about all I can do for now, so I'll weigh it.  What do you think is the best way to do that?  I could go the two-scale route, but I wonder if there's another way?