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SB3 different frames
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bimotanige



Joined: 12 Jul 2010
Posts: 582
Location: yorkshire

PostPosted: Mon Feb 16, 2015 9:33 pm    Post subject: SB3 different frames Reply with quote

Hi All
An interesting bit of research required for this quandary = looks like an email to the factory as a last resort. Ive 2 SB3s with not a lot of history. One is "standard" with solid swingarm and parts as per the parts manual, the second is very different and I suspect is a "race special" from the late 70's early eighties. Heres a few pics. The non standard frame is significantly lighter than stock, I think the tubes are thinner walled.

Standard swingarm on the right. The one on the left is drilled and lightened and 20mm narrower at the pivots


Standard frame, note battery mount, long fairing lugs and distance from lower rhs bottom engine mount to frame.


lightened frame, note frame is built different to allow more chain offset for larger width tyre, extra lugs on the top rail, extra lug on the bottom rail, no battery box base. The rear seat support has been added on and the frame originally only had 2 spars that weren't connected at the rear. Spacers with this frame were much smaller reflecting narrower swingarm pivot width


Picci of the swinging arm.

Ive had these parts stripped and all the welding looks original. So far failed to find any pics of this bike. The footpeg mounts are also cast differently to raise the pegs by about 20mm. Currently it has 16 inch, 4.5 inch rear, magnesium Campag wheels with well used slicks on them. The exhaust is also very light, with the collector box being flat instead of the 2x2 square box shape as per the "normal" SB3 and KB1, I suspect to increase ground clearance for the smaller wheels.
Well there you go for a starter gents!!
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bimotanige



Joined: 12 Jul 2010
Posts: 582
Location: yorkshire

PostPosted: Tue Feb 17, 2015 8:01 pm    Post subject: Reply with quote

well that's rendered all the "armchair experts" speechless!!
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Mike Jennings



Joined: 22 Mar 2008
Posts: 286
Location: England

PostPosted: Tue Feb 17, 2015 11:32 pm    Post subject: SB3 frames Reply with quote

Hello Nige,

for what it's worth gilera-saturno.de has a piccie of what looks like your frame at an Italian autojumble. I looked up Bimota SB3 drag racer on google and went to images.

Cheers, MikeJ
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bimotanige



Joined: 12 Jul 2010
Posts: 582
Location: yorkshire

PostPosted: Wed Feb 18, 2015 8:46 pm    Post subject: Reply with quote

Hi Mike
Yep found it, indeed it's probably the one, just a hint of red Marzocchi bottom right!
Still no nearer to what it is??
cheers
Nige
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Mike Jennings



Joined: 22 Mar 2008
Posts: 286
Location: England

PostPosted: Thu Feb 19, 2015 7:41 pm    Post subject: SB3 swinging arm Reply with quote

Hello Nige,

some of the Bimota race frames for the Harley two stroke works racers in the mid seventies had peforated swinging arms like yours - it certainly doesn't look like something that could have been done after assembly,

Cheers, MikeJ
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bimotanige



Joined: 12 Jul 2010
Posts: 582
Location: yorkshire

PostPosted: Thu Feb 19, 2015 8:33 pm    Post subject: Reply with quote

It's defo been done b4 assembly as the swingarm is not just perforated box section, there is a stiffener in the middle. I get them back from the coaters tomorrow fully stripped so I can check before they get redone. See if all the welding etc matches up and see if they have had any repairs done
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brian



Joined: 22 Aug 2011
Posts: 3769
Location: Australia

PostPosted: Fri Feb 20, 2015 9:53 am    Post subject: Reply with quote

Certainly an interesting find Nige. Did you know that the bikes were different when you acquired them?
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bimotanige



Joined: 12 Jul 2010
Posts: 582
Location: yorkshire

PostPosted: Fri Feb 20, 2015 2:04 pm    Post subject: Reply with quote

Hi Brian
I didn't know they were fundamentally different sizes and engine offset. the plan was to make one really good one. I've checked the frame parts and it's all matching original welding except a small repair on a coil mount.
Looks like an attempt at talking to Bimota, but really need one of the old school or race development chaps from the 80's. Wonder if Con on here knows the right person?😄
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brian



Joined: 22 Aug 2011
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PostPosted: Fri Feb 20, 2015 10:11 pm    Post subject: Reply with quote

Good luck in your search Nige. Keep us posted. Very interesting.
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Bud977



Joined: 03 Mar 2013
Posts: 525
Location: Sydney

PostPosted: Mon Feb 23, 2015 10:30 am    Post subject: Reply with quote

They sure are different. Someone has gone to a lot of trouble to make a different bike. Did Bimota make SB3 race bikes?

Here is a photo of another stock frame:



No large holes in that one.
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bimotanige



Joined: 12 Jul 2010
Posts: 582
Location: yorkshire

PostPosted: Mon Feb 23, 2015 9:41 pm    Post subject: Reply with quote

Hi Bud
Thanks for the pic. One of the frames is what I would call "standard", the holy frame certainly isn't.
another difference I've found is that it's wider across the rear axle, despite being narrower across the swingarm pivot bearings. I'll pen an email to The factory and wait!😡
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bimotanige



Joined: 12 Jul 2010
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PostPosted: Tue Mar 03, 2015 3:21 pm    Post subject: Reply with quote

email sent with pics. the wait begins!!!! Sad
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2bims



Joined: 03 Apr 2010
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PostPosted: Tue Mar 03, 2015 4:09 pm    Post subject: Reply with quote

bimotanige wrote:
email sent with pics. the wait begins!!!! Sad


and will possibly never end....been a year since my last email to bimota...still waiting.....been 2 years since my 2nd to last email to them....guess what? still waiting..... Shocked
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crankcase



Joined: 09 Nov 2011
Posts: 387
Location: Frankfurt Germany

PostPosted: Tue Oct 20, 2015 7:20 pm    Post subject: Reply with quote

I wish I could post pics without first having to put them in photobucket,
just sent Nigel an email
found the sister bike in Verona
holes and everything
I'll put it all up on Facebook in the next few days
The highpoint of our week in Italy (for me anyway)
Just can't believe this thing hasn't been found before !
facebook address: https://www.facebook.com/ian.alderton.33
Quite jealous of Nige for having such an historic piece of kit
Only soothed by the thought of the still 'on the way' YB4 in the barn : )
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crankcase



Joined: 09 Nov 2011
Posts: 387
Location: Frankfurt Germany

PostPosted: Fri Oct 23, 2015 3:45 pm    Post subject: Reply with quote

Just sent all my pics to Nige

they are also on Photobucket
http://s1214.photobucket.com/user/thecrankcase_com/library/Bimota/SB3-verona?sort=3&page=1

and a couple here

In the Nicolis museum in Verona with a KB1 for company




swingarm like Niges' extended footrest plates


Forcella forks with calipers that I've never seen before !


shortened footrests, maybe the brackets were left over from the right foot shift days ?






more holes

Looks like a bit of Ferrari connection ! exhaust plate says: DUERRE FIORANO but the first D could be an O or even a Q ?

The info notice with the bike calls it a RB1 Furya
wonder what the R stands for?
"the initials bimota and consist of the initials of the surnames of the three partners fondation white morri and drummers. This model was developed in workshops Ferrari. Racing department of Maranello. The windshield and a patent Ferrari"

looks like you have a really special bike Nige
wonder why nobody noticed it/remembered it before

We can't have been the first people ever to go in this museum . .

Would be excellent if you could get yours up and running looking like this

good luck

Ian

translation by google !
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