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-   -   Project n'gagi - '75 BMW r90/6 to cafe racer (http://www.advrider.com/forums/showthread.php?t=840045)

Hearse 11-08-2012 08:29 PM

Project n'gagi - '75 BMW r90/6 to cafe racer
 
Hey guys,

How's it all going?

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:
http://imageshack.us/a/img341/5065/cominghome.jpg
http://imageshack.us/a/img850/9028/cominghome2.jpg
http://imageshack.us/a/img441/1836/cominghome3.jpg
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
http://imageshack.us/a/img855/7236/j...reteardown.jpg

Bike stripped down:
http://imageshack.us/a/img26/6398/st...70complete.jpg

Looking over the frame this is the worst of the rust which was located under the master cylinder
http://imageshack.us/a/img836/6150/worstoftherust.jpg
What I plan to do:
- repaint the frame/sub-frame/drive shafr with 2pac paint
- aqua blast engine and gearbox to shine it up
- build own bubble cowl for the rear and have a crack at building a seat 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?
- is it worth updating all of the ignition gear? coils etc?
- I am looking at rebuilding the front forks and carbies where can i get rebuild kits? anywhere in Australia?
- I want to put some rear sets on, I have some bolt on kits on the net, they look the goods or is there any better ideas?

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

Kurlee 11-09-2012 05:17 AM

Looks like an excellent platform to build on! Are you planning just a cosmetic build or are you going to dabble in some engine performance as well?

Hearse 11-09-2012 12:59 PM

Just cosmetic for the interim, i will play with the brakes a bit because they are crap on this bike. the engine is running sweet do no need for work on it yet, but i do plan in working on it, not just yet but :)

ktmklx 11-09-2012 05:17 PM

That should be a cool looking cafe racer. So what do you mean by "aqua blasting"?

Hearse 11-10-2012 01:26 AM

Thanks mate, I'm going to put max effort in to this bike and take my time, hopefully it comes up with the goods

I saw some YouTube clips of people aqua blasting their blocks, which was basically a super high pressure jet of water

Any other ideas of how to clean it..should I treat it after cleaning with some form of sealant?

Hearse 11-10-2012 01:27 AM

Ah yea, engine will be out tomorrow so more photos then :)

michael1968 11-10-2012 02:52 PM

Quote:

Originally Posted by Hearse (Post 20004112)
- the front and rear fenders are fibreglass, do you guys paint strip/prep/paint or sand/prep/paint?

I'd sand/prep/paint, paint stripper could mess with the fibreglass resin.

Quote:

Originally Posted by Hearse (Post 20004112)
- I am looking at rebuilding the front forks and carbies where can i get rebuild kits? anywhere in Australia?

Not in Australia but if I need BMW parts I order from motorworks.co.uk their prices including shipping are better than the dealers.

Good luck with the build, it looks like a great platform to start with.

Cheers,
Michael

Hearse 11-10-2012 10:11 PM

Thanks heaps Michael,

I just put a $1000 order in :eek1 from motorworks.co.uk

How quick is their shipping to AUS?

Engine and frame are apart finally. My fingers were fine but dads got jammed twice, swore the house down...far from ideal

I'll post some piccies in the morning

michael1968 11-10-2012 10:21 PM

Quote:

Originally Posted by Hearse (Post 20017780)
Thanks heaps Michael,

I just put a $1000 order in :eek1 from motorworks.co.uk

How quick is their shipping to AUS?

Engine and frame are apart finally. My fingers were fine but dads got jammed twice, swore the house down...far from ideal

I'll post some piccies in the morning

No worries, they usually only take a week or so. For that big of an order they'll probably even throw in a free key ring.

Hearse 11-10-2012 10:50 PM

Quote:

Originally Posted by michael1968 (Post 20017815)
No worries, they usually only take a week or so. For that big of an order they'll probably even throw in a free key ring.

Mate, sometimes the key ring seals the deal for me :rofl but I won't hold my breathe

How much do you reckon a frame will cost to get sand blasted?

Euromad 11-13-2012 08:57 AM

Baking soda blasting will clean the engine real well without harming them. There is a master cylinder you can use from a /7 BMW but you will need to replace the lever perches and switch gear as well. On my /6 I bought a better disc, stainless line and better pads- made a huge difference. Been so long I've forgotten what they are but check San Jose BMW ( CC products) and Bob's BMW for upgrading parts.
Progressive springs in the forks and better shocks in the back will help a lot too.
Good luck!

Hearse 12-30-2012 01:03 AM

Hey guys,

dont shoot me - i know i need to update more...but anyways.

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 ;-)
http://img836.imageshack.us/img836/7...ingcabinet.jpg

the engine was filthy...
http://img534.imageshack.us/img534/8...rtyengine2.jpg

and i tried it out on the filter cover just real quick - see if this all worked (never done ANYTHING like this before)
http://img716.imageshack.us/img716/9...ingexample.jpg

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
http://img201.imageshack.us/img201/3...stedengine.jpg

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:
http://img141.imageshack.us/img141/8...elhubfront.jpg

and after a working over:
http://img443.imageshack.us/img443/9...elhubfront.jpg

and the side of the hub:
http://img818.imageshack.us/img818/2...tywheelhub.jpg

and after:
http://img838.imageshack.us/img838/1...anwheelhub.jpg

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!)

next post...seat cowl

Hearse 12-30-2012 01:11 AM

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)
http://img7.imageshack.us/img7/15/settingupplug.jpg

Then i started shaping it up:
http://img43.imageshack.us/img43/272...ingproject.jpg

...and pretty much shaped:
http://img694.imageshack.us/img694/9...mostsanded.jpg

then i put some builders bog over it (one of THREE layers..)
http://img841.imageshack.us/img841/7105/pluhbogged.jpg

after about 5 hours of bog/sand/bog/sand etc...
http://img252.imageshack.us/img252/7622/plugsanded.jpg

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)
http://img855.imageshack.us/img855/1294/plugtapedup.jpg

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

Contevita 12-30-2012 02:33 AM

Subscribed!

michael1968 12-31-2012 11:13 PM

Quote:

Originally Posted by Hearse (Post 20355707)
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)

Hairspray over the wax works well also.

Looking great!


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