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'New' BB1 : Longterm Project

 
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jonhenry



Joined: 05 Nov 2017
Posts: 8
Location: Vale of Glamorgan, South Wales

PostPosted: Sun Nov 05, 2017 12:21 pm    Post subject: 'New' BB1 : Longterm Project Reply with quote

Morning

I'm the owner of a BB1 Supermono, its been in my family for some time (since early 2000's), was regularly ridden by my mum, who I took up ownership from.

A lot of the issues have previously been looked into by others, however I want to try and bring the bike back again.

As information is proving difficult/scarce, i'm hoping this thread can go some ways towards addressing some of the issues i encounter and how to rectify.

Known issues with the bike:

1.0 Fueling

1.1 Problem — Carbs Mikuni BST33 : Completely Seized Solid
1.1 Solution — Complete strip down, ultrasonic clean. rebuild & Setup

1.2 Problem — Brass Choke pipework has sheared away from the carb body, from reading, this appears to be a very common problem on most engines with the f650. but also most bikes with the BST carb variant. Bike will likely have been overfueling for some time.
1.2 Solution — Some RC hobby shop brass fuel line (3mm OD) with a 4mm OD sleeve for the top hole) should allow for a new pipe to be installed. Possibility of adding a small plastic pipe break within the brass to absorb the vibration, hopefully preventing the shear in the carb body.

1.3 Problem — Fuel Tank captive nuts have become rounded and are rotating within the hole.
1.3 Solution — Grind out hole, strong adhesive and re-install captive nut flush with tank.

1.4 Problem— Fuel Lines completely perished
1.4 Solution— New Lines

1.5 Problem — Fuel Pump completely blocked
1.5 Solution — Replace with new. Pump is common pump across what appears to be 90% of the Fiat, Alfa, Lancia range. cheap and available.

2.0 Bodywork

2.1 Problem — Vapour Pockets have appeared all over all panels, where it is believed the curing process was not complete in manufacture. I believe the cure for this is a full respray, the pockets of vapour cannot escape.
2.1 Solution — I’ve spoken to a couple of bodyshops who have described the paint job of the bike as 'poor' and 'probably done with a rattle can', which they then backed up with evidence of spray pattern and style, along with the silver being identical to over the counter alloy wheel spray silver!

Helpful advise seemed to suggest that the curing process had not been allowed to completely finish, and putting the panels in a paint oven to cure (properly) would then show the full extent of the issue. I'm pretty sure ill be respraying it. So any help with Colour Codes or colours you've had success with would be great please.

2.2 Problem — Bike was dropped during a house move, luckily only a minor impact to the side panel, will need repair and repainting.
2.2 Solution — See above,repair and respray

3.0 General

3.1 Problem — Brake leaver has sheared due to previously mentioned dropping of bike,
3.1 Solution — Easy fix with Apilia 650 Pegaso, of the same era, lever (shared component).

3.2 Problem — Left-hand side (when sitting on bike) mirror/indicator unit has been badly damaged.
3.2 Solution — Try to source replacement, could do with some help on this one. I know the part is shared with the Gilera CX125, however that's hardly a common bike, so is almost useless! Help??

So all in all, not a huge amount of work! just time to do it all.
Ill try and address each solution in a separate thread post for my sanity.

Cheers
John
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stockcar



Joined: 07 Apr 2011
Posts: 836
Location: in the shadow of the "angel"

PostPosted: Sun Nov 05, 2017 12:42 pm    Post subject: Reply with quote

Cant help with your search but sounds like a good project, best of luck
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jonhenry



Joined: 05 Nov 2017
Posts: 8
Location: Vale of Glamorgan, South Wales

PostPosted: Sun Nov 19, 2017 4:08 pm    Post subject: Reply with quote

Update: Bits of progress, slow unfortunately as works been hectic and the friends Workshop where I am planning on doing most of the work is experiencing a huge volume of bikes at the moment. Anyway;

1.1 - Carbs have been stripped, uncovered the emulsion tube and O Ring on both carbs have never been removed, and it's absolutely clogged/useless. so will require replacing. I would imagine this would be another reason for the poor running/idle condition of the bike. Complete rebuild kits will be sourced shortly.


1.2 - After looking for small barb ended cast brass parts from model trains/planes/cars, nothing was coming up sadly. Despite being able to see the part I would ideally like on smaller Chinese made carbs for strimmers/chainsaws etc etc. So I’m back to the original solution of buying a small length of brass tubing bending it carefully into shape. As its such a common issue, Im tempted to see if its a re-manufacturable part that all BST carb overs could use. If you’ve got a BB1. its worth checking this as even with the carbs off its just about noticeable.

1.3 - Sorted, ground out, adhesive in, nut inserted, left for 48 hours, job done.
Before -

After -


2.1 - After looking through the BB1 register, there appear to be very very minor differences in the ‘line’ of the silver/red changeover on the bodywork. Going to attempt to find a decent colour match over the next few days.

3.1 - Brake Lever has been replaced, simple enough job.


Next Steps -
1.2 - New Brass pipework on the way


Cheers
John


Last edited by jonhenry on Sat Nov 25, 2017 10:00 am; edited 5 times in total
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arsenic



Joined: 05 Feb 2017
Posts: 140
Location: France

PostPosted: Mon Nov 20, 2017 11:21 am    Post subject: Reply with quote

we can't see the pictures, you should use Hostingpics to upload them !
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DB8 biposto
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jonhenry



Joined: 05 Nov 2017
Posts: 8
Location: Vale of Glamorgan, South Wales

PostPosted: Wed Nov 22, 2017 9:15 pm    Post subject: Reply with quote

arsenic wrote:
we can't see the pictures, you should use Hostingpics to upload them !


Will change over now! i've never had an issue with photobucked before, but will change now.

Cheers
John
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jonhenry



Joined: 05 Nov 2017
Posts: 8
Location: Vale of Glamorgan, South Wales

PostPosted: Fri Nov 24, 2017 6:21 pm    Post subject: Reply with quote

Photos now hosted with imgur, works well when linking as 'large thumbnail'

Problem 1.2
Thought I would try and illustrate the issue with the carbs. It appears best in black and white, you can see where the brass pipework has sheered, where it has been flared larger. 3mm internal diameter to 4mm Internal diameter.



have seen this problem on the BST40 carb from Mikuni too.

Finally, a nice photo of the bike itself, mid strip down.


Cheers
John
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barnmankit



Joined: 23 Nov 2014
Posts: 97
Location: Pyrenees, France

PostPosted: Fri Nov 24, 2017 6:35 pm    Post subject: Reply with quote

Well done John, great to see a sad and neglected Bimota being given the tlc it deserves. Good luck with the project.
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1998 Bimota DB2 edizione finale naked
1976 BMW R75/6 tractor (for sale)
ICE recumbent trike
A shed full of bicycles

"We're each given one small grain of madness - if we lose it, we're nothing." Robin Williams
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jonhenry



Joined: 05 Nov 2017
Posts: 8
Location: Vale of Glamorgan, South Wales

PostPosted: Thu Nov 30, 2017 5:59 pm    Post subject: Reply with quote

Update:

The brass pipework has arrived, 4mm and 3mm. Going to sand pack them and make a test fitting set this weekend.

2.1 - VERY happy about this. Went to the paint shop last weekend to try and test match Bimota 'Supermono Red'. Lad at the shop insisted it was 'VW Flash Red' and to his credit, it pretty much is; See for yourself.





So there you have it - 2 Pak VW Flash Red is BB1 Supermono Red

More to Follow
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iwklee



Joined: 20 Dec 2017
Posts: 1
Location: Malaysia

PostPosted: Sat Jan 20, 2018 3:25 am    Post subject: Reply with quote

Hi John... How is the restoration coming along?

Are you still looking for the mirror/indicator?

You can find them here..

http://www.bimota-parts.de/en/component/virtuemart/bb1-supermono/blinkerspiegel-bb1-detail.html?Itemid=470
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vort28



Joined: 22 Mar 2010
Posts: 2194
Location: Northwest , UK

PostPosted: Mon Jan 22, 2018 1:50 pm    Post subject: Reply with quote

Good to see a BB1 being brought back to life , they are a timeless beauty .
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2bims



Joined: 03 Apr 2010
Posts: 7289

PostPosted: Mon Jan 22, 2018 2:04 pm    Post subject: Reply with quote

iwklee wrote:
Hi John... How is the restoration coming along?

Are you still looking for the mirror/indicator?

You can find them here..

http://www.bimota-parts.de/en/component/virtuemart/bb1-supermono/blinkerspiegel-bb1-detail.html?Itemid=470


Rudolf of Bimota-parts.de is a decent fellow....but you would have to message him in German using a translate tool...he speako no engleesh...and for payment he only takes direct bank transfer...no paypal or credit cards...but you can trust him
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jonhenry



Joined: 05 Nov 2017
Posts: 8
Location: Vale of Glamorgan, South Wales

PostPosted: Wed Apr 04, 2018 7:30 pm    Post subject: Reply with quote

Evening Everyone,

Thanks for the link to the mirror, im sure translation isnt too difficult and if he's got a +1 from people on here then it should be ok!

Sadly the project hasn't progressed an awful lot, about a week after my last update I managed to suffer a Lower back inflation and hip ligament strain, so have been out of action for a while, i'm about 2 weeks off being ok for action again so that can all be picked up again.

Hopefully a more fun update soon!
Cheers
John
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