Project n'gagi -- 1975 BMW r90/9
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Project n'gagi -- 1975 BMW r90/9

This is a discussion on Project n'gagi -- 1975 BMW r90/9 within the Project Builds forums, part of the Caferacer.net Forums category; Hey guys! I dig this forum - get some solid idea's from here. I am new to the forums in a registered member sense, but ...

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  1. #1
    Member hearse's Avatar
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    Project n'gagi -- 1975 BMW r90/6

    Hey guys!

    I dig this forum - get some solid idea's from here.

    I am new to the forums in a registered member sense, but I have been lurking often in forms of research for my bike before buying it.

    Quick run down:
    26 years old
    live in Sydney
    currently ride a '06 VTR1000f which I love, man I love Honda's
    just purchased my 1975 BMW r90/6 which I am going to do a full strip/rebuild in to a cafe racer

    So this is my bike on its way home:



    The bike itself is in mechanically really good condition, engine is strong as, and the only leak is the one fuel tap...hopefully it stays that way cosmetically it needs love, but thats why I got it, it would be boring otherwise!

    Bike set for tear down


    Bike stripped down:


    Looking over the frame this is the worst of the rust which was located under the master cylinder

    What I plan to do:
    - repaint the frame/sub-frame/drive shafr with 2pac paint
    - soda blast engine and gearbox to clean it up
    - build own bubble cowl for the rear and have a crack at building a seat pad as well
    - repaint tins and newly constructed cowl with 2pac paint

    Questions I have
    - the front and rear fenders are fibreglass, do you guys paint strip/prep/paint or sand/prep/paint?
    - that damn master cylinder - which master cylinder from which bike will suit a handle bar relocation? which one have you guys used?

    I am using Motorworks BMW Motorcycle Specialists - Home to get my parts - best place ever....they are so awesome, helpful, great prices (compared to USA/AUS) and real quick shipping

    I will do my best in keeping this thread updated with the bike build, but I am really going to take my time and do this nicely to one sweet ass build

    Thanks guys!

    Cheers,

    Warren
    Last edited by hearse; 01-15-2013 at 02:13 PM.
    Project n'gagi begins 07-11-2012 -- Get involved!!
    Build Thread: https://www.caferacer.net/forum/proje...w-r90-9-a.html

    2006 Honda VTR1000f
    1975 BMW R90/6

  2. #2
    Member hearse's Avatar
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    Pproject n'gagi -- 1975 bmw r90/6

    I got the engine and frame separated (as earlier stated)



    I got a set of custom BMW r90 purpose built rearsets from a dude in America who is a fabricator (BOXERMETAL.com) they were ever so slightly more expensive than other "retro fit ones" but man oh man they are awesome - one can see the effort put in those, and amazing quality. Check them out for other boxer/air head stuff

    - - - Updated - - -

    So i have been doing a bunch of cleaning and shaping.

    First - the engine! ... that damn engine!

    So i have used soda blasting...first i built a soda blasting "cabinet" that has been proudly sponsored by Riverbed ;-)




    the engine was filthy...


    and i tried it out on the filter cover just real quick - see if this all worked (never done ANYTHING like this before)


    in comparison it works pretty awesome, and that was just a quick blast, so after a real good working over it looks great, ill have to grab a photo tomorrow with no soda residue on it, but here is a sneak peak


    pretty bad ass result eh - but ill get a better pic tomorrow.

    Then i moved on to the wheels - man they are a mess...anyways,

    rear hub before:


    and after a working over:


    and the side of the hub:


    and after:


    so it appears i am getting the hang of it! I need to replace all of the bolts to stainless so it looks better and i have new sets of spokes to respoke the wheel (also something i havent done before!)

    I have "sealed" the cleaned parts with some silicon - i know i will need to re-apply it but thats ok...better than putting a clear over it and it yellowing.

    next post...seat cowl
    Last edited by hearse; 01-29-2013 at 01:05 AM.

  3. #3
    Member hearse's Avatar
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    and the seat cowl!

    So i have just completed the plug for the seat cowl - i was heaps nervouse initially but after i got it taped up i was stoked how well it went.

    So first i got the frame built and some plant foam in place (sizing it up)


    Then i started shaping it up:


    ...and pretty much shaped:


    then i put some builders bog over it (one of THREE layers..)


    after about 5 hours of bog/sand/bog/sand etc...


    so after wraping the plug in painters tape and a layer of wax (bunch more layers of wax tomorrow and then 1:1 of PVA glue/water before fibreglassing)


    so i will be fibreglassing this week - get my seat cranking!!

    here is my little store room with a little work bench


    - - - Updated - - -

    seat cowl is complete (to an extent)

    So I glassed the cowl with 4 layers of FG...







    Then when that finally set, i removed the mould from the plug:





    not with out spilling some claret - this is it cleaned up, it bled a lot OK :lol3



    and a bit of trimming to make it look better:






    Next step is to high fill the mould ready for primer and paint

    - - - Updated - - -

    so the seat has been high filled to make it as smooth as I can, 4 layers of primer has been layed on it and its ready to be sanded/painted...stoked. I will make the seat for it later and wrap the seat cover around the bottom of the seat and rivet it along the side to finish it off.





    Next step is to prep the tank and my fairings (im using the stock front fairing but i need to find a replacement rear fearing, i dont want the stock one (goes up under the seat) does anyone know of a fairing that will fit the bike that i could replace it with? i was thinking of just taking the width of the fairing and radius and find one that will fit at the wreckers.

    the tank stripped and looking like it needs some love





    the old tank badges retired from its duty



    do you guys think that i should put my nose fairing on? i think i should - it would look pretty bad ass all painted up and mounted


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  5. #4
    Member hearse's Avatar
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    next pics will be of the tank stripped of paint, i have a small dent to fix - then high fill, bit of primer and then the same for the front guard (still need to track a rear guard that doesnt go under the seat pan) then its time to rig a paint booth at home :-|

  6. #5
    Senior Member Geeto67's Avatar
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    I remember this bike from advrider. Nice to see you are still cranking on it.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
    - Samuel Beckett
    A tool is just an opportunity with a handle
    - Kevin Kelly

  7. #6
    Senior Member o1marc's Avatar
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    So did you actually make a mold or just make the seat off the buck. If the buck (the wooden part) was as smooth as you want the finished product you would use wax or mold release agent and then fiberglass over that to make a mold that would be smooth on the interior and then you would use wax or release agent inside it to start laying fiberglass so when you took the seat out from under the mold the outer surface would be smooth with almost now filler needed.
    www.CreativeCandy.org

    I carry a gun because I'm too young to die, too old to take an ass whooping, and a cop is too heavy.

  8. #7
    Member hearse's Avatar
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    Quote Originally Posted by o1marc View Post
    So did you actually make a mold or just make the seat off the buck. If the buck (the wooden part) was as smooth as you want the finished product you would use wax or mold release agent and then fiberglass over that to make a mold that would be smooth on the interior and then you would use wax or release agent inside it to start laying fiberglass so when you took the seat out from under the mold the outer surface would be smooth with almost now filler needed.
    hey mate - yea i realised this afterwards...i know silly me, but what can you do? its all done now, its smooth as how it stands at the moment.

    I made everything, wood surround, foam shaping etc etc.

  9. #8
    Senior Member J-Rod10's Avatar
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    Looked to be a ton of air in your glass. Hope you sanded through it and filled it in. Otherwise, you may have some issues down the road.
    www.slipstreamcycle.com

  10. #9
    Senior Member o1marc's Avatar
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    Quote Originally Posted by hearse View Post
    hey mate - yea i realised this afterwards...i know silly me, but what can you do? its all done now, its smooth as how it stands at the moment.

    I made everything, wood surround, foam shaping etc etc.
    Your method was the same time saving method Bob used when making the nose on the Bonneville car we built. When asked how he designed the nose he said "I glued 3 big blocks of foam together, drew the shape of the firewall on one end, got out the chainsaw and cut off anything that didn't look like it would go 300mph."

    www.CreativeCandy.org

    I carry a gun because I'm too young to die, too old to take an ass whooping, and a cop is too heavy.

  11. #10
    Senior Member vintage913's Avatar
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    Quote Originally Posted by hearse View Post
    hey mate - yea i realised this afterwards...i know silly me, but what can you do? its all done now, its smooth as how it stands at the moment.

    I made everything, wood surround, foam shaping etc etc.
    I say "good job you're doing here". I especially like the black Jim Beam box under the shelf, my favorite brand for many years, although now I've taken up with Knob Creek single barrel reserve. Very smooth.

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