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Old 05-29-2014, 01:17 PM   #1
viva_brasil
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Build Thread: Ducati MonsterStrada 900

Hi All - decided to post this thread as I have a good foundation of pictures and work so far...

Background
My dream build is a fun, lightweight, torquey Ducati "2V SBK" - and I spend a lot of time thinking of all the different variations of this concept. Ducati never put a 2V air-cooled motor in a SBK frame, but it's not that difficult to DIY. I've spent the past ~2 years or so compiling a bunch of information - which I will be sharing online soon, working my way up in terms of builds, and setting up a small bike workshop.

This Build
I actually didn't intend to build this, but I found a perfect 900 supersport motor with FI components and wiring harness, etc. locally almost at the same time as I found a Multi here on BARF (it had a tired 620 motor in it with a stuck trans). I was gearing up for my first 2V SBK build but quickly found myself with enough parts to build 2... 3... bikes. And so the MonsterStrada build was born.

The Multi frame is based on the SBK frame, so this could be a loose interpretation of a 2V SBK. Though now it's looking more like a variation of a Hyper than a SBK.


Chapter 1: Donor Bikes, Workshop Space

Donor Monster 900 - It's carb'd but the heads on the motor are the bigger valve "V" heads - a rare combination


Take the M900 apart to get the parts I wanted (motor, front end, etc.), this is the "before" picture for the shop as well...


Multistrada 620 donor, starting garage / shop build out


Shop built out - pressing bearings out of the 2V motors (new SS motor that will go into the SBK frame and the M900 motor for the Multi frame)


Close up here of the set-up... Bearings need to be pressed out so that the engine cases can be machined down for the SBK and Multi narrower set-up. Then they need to be pressed back in.



Chapter 2 - Multi tear down and Initial Rebuild

Here we go...


Damn, that is a pretty sexy looking tail section... Definitely need to incorporate that into the final design


One way to do it... Swapping front ends


With the M900 front end... I also can't find pictures, but the top triple needs a shim / spacer - I turned a pair of shims on the lathe with a top lip which worked out great.


Time to pull the motor out and put that 900 in... Also, not pictured is the grinding of the M900 motor case and repressing the bearings, cleaning the motor, etc.


And M900 motor in with a SSSA from a Hyper (I think?) and a rear shock from a 848 (which I later switched to a 999 because the reservoir allows for better clearance)


Another angle...



Chapter 3 - Multi Build-Up

Initial mock-up with tires and a Monster 1100 rear wheel (I'm going to go with a Ducati 748 tri-spoke Brembo wheel for the completed bike - to match the M900 tri-spoke front Brembo)


YES... now it's coming together.






Chain and sprocket install... The motor had a 520 sprocket while my swingarm had a 525, and none of the chains I had fit... So sourced a 525 front sprocket -1 tooth and a new 525 chain
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Last edited by viva_brasil; 05-30-2014 at 09:04 AM.. Reason: Added pics.
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Old 05-29-2014, 01:18 PM   #2
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Chapter 4 - Some special additional side projects to make sh*t work...

Carb Clean and Rejet



The sound that this is going to make...



Wiring / Relay Tuck

I wanted to put all the relays into the back seat compartment for a nice clean look, so extended the wiring harness to make it work. Here it is in progress...



Fuel Tank Block Off Plate
So the fuel pump won't work with the carbs... so I needed to make a fuel plate to replace the fuel pump and run that to the carb's vacuum pump

Aluminum plate...


The plan...


The result


I cleaned it up, installed a drain fitting, and sandwiched bolted it onto the tank with the rubber gasket in between... No picture of that yet.


Battery and Coil Mount Plate
Without the airbox or a battery mount, I needed to make something...

Took some rough measurements and cut some aluminum sheet, and bent it... Then put the battery on to mock it up


Cut it out, drill some stuff, and test fit with coils


And add the battery... Yes that's a massive zip tie to secure the battery - just in case.



Seat / Exhaust stuff

Cutting the exhaust so I can extend the pipe - the 900 head to rear block length is about .5" longer - so the stock 620 pipe had to be modified


Here's the exhaust initially installed with the freshly recovered seats - they were recovered with this awesome grippy material, very happy with it


But not so happy with the exhaust - it didn't fit perfectly, and I decided against an undertail exhaust... remember minimalism? And that tail section is so sexy, I don't want anything cluttering it up. So going with a custom made under body design, influenced by the newer 1199 style.


Carbon Fiber Gauge / Headlight mounting tabs

My plan was to make the battery / coil mount out of CF - and I may still do that since I need to pull the tank / seat / body off one more time... But the tabs were easy enough. Basically, for my Monster headlight and gauge to work with the Multi triple - I had to make custom tabs to bring it all together. The screws holding the gauge cluster down have pins that insert in the headlight bracket, so everything had to line up perfectly.

First make them out of sheet metal...


So these are weak, ugly, and stupid. Carbon fiber is sexy, strong, and awesome.


Wet lay up of carbon fiber using Epoxy with a 20 minute hardener, I think I used about 4-5 sheets and this is 3 mil I believe... In other words, strong as f*ck


After it had cured...


My advanced trimming station with vacuum hook-up


After trimming it down


Installed...



Carbon Fiber bodywork / Finishing Touches

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Last edited by viva_brasil; 09-16-2014 at 05:00 AM..
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Old 05-29-2014, 01:20 PM   #3
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Nice!!
Looking forward to seeing more pics!
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Old 05-29-2014, 02:18 PM   #4
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Old 05-29-2014, 03:14 PM   #5
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Old 05-30-2014, 12:34 PM   #6
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Old 05-30-2014, 01:45 PM   #7
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Old 05-30-2014, 07:03 PM   #8
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That's my old monster!! I remember selling it to you! Haha. Sad that it's all torn down now but glad it's getting put to good use
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Old 05-31-2014, 09:00 AM   #9
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I thought carbon fiber layup had to be vacuum sealed?

That is sexy.
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Old 05-31-2014, 05:48 PM   #10
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Oh yea! sorry man... it's heart lives on though. And the Multi was from a forum member as well...

CF layup doesn't have to be vacuum sealed, though vacuum bagging will give you a more optimal fiber to resin ratio - which makes it stronger.

For these quick parts that aren't really "structural" - I decided to not vacuum bag them. I'm not planning to vacuum bag the panels I make either, but I will be vacuum bagging the subframe I want to make for the 2V SBK's.
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Old 05-31-2014, 06:47 PM   #11
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That is some sick builds! That multi tail looks sick with everything stripped off of it.

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Old 06-01-2014, 03:07 PM   #12
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awesome work!

i would keep the multi spoke rear wheel for the SSSA
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Old 06-02-2014, 05:41 AM   #13
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Quote:
Originally Posted by viva_brasil View Post

CF layup doesn't have to be vacuum sealed, though vacuum bagging will give you a more optimal fiber to resin ratio - which makes it stronger.

For these quick parts that aren't really "structural" - I decided to not vacuum bag them. I'm not planning to vacuum bag the panels I make either, but I will be vacuum bagging the subframe I want to make for the 2V SBK's.

Good to know!

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Old 06-02-2014, 06:11 PM   #14
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Did you buy the Multi from Jeff in Oakland? If so I have ridden that bike. We were all sad when the trans gave up. If that is the bike I am really stoked to see it becoming this project.
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Old 06-02-2014, 06:18 PM   #15
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Yep that's the one - Jeff and Conan brought it down. Still have the same plate, kept it registered to motivate me to finish quickly... and it'll be titled as the same Multi 620.

Randomly met one of the Brammo guys at a bike expo - he knew Jeff (supposedly has the highest mileage Brammo in the area now) and the Multi too. Great group of guys!
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