Bimota Forum

[who]

I'll have to check the GTS TB spacing, as I will need to adapt some stock inlet manifolds otherwise. I can't use anything other than what the bike came out with in the pre-90 class, so 93 GTS TB's are not an option.

I'm surprised they campaigned the YB4 with carbs, though it was only after the F1 TT victory that the FI YB4ie came about?

I'm building two 1000's initially, 41mm FCR's would be a logical choice, but have the downside of being a temperamental all or nothing sort of an affair.

The YB's TB's are only 37mm, but could easily be let out to 39.5mm. The advantage is with a fully programmable ecu such as ignitech, you have the ability to have a number of maps at your disposal, and a switch on the handle bars The other advantage you have with FI is he ability to map out stumbles etc, and fuel in conjunction with a Wideband Commander. I'm hoping for 170--180 rwhp out of these bikes, and I'm currently talking with Bazzaz regarding the integration of traction control. The whole project is just a bit of a science experiment!

[crankcase]

hi who
I had a few moments to do a bit of hunting . .
BMW k bikes came out with Bosch inj in 1985, maybe some possibilities there (or do I understand that you can only use the original Bim stuff) when I searched ebay for K throttle bodeis- one of the ads mentioned they were made by Bing which would make a lot of sense.
and I searched Weber and Magnetti throttle bodies, but all the car ones are single bodies- one butterfly for the whole engine- usual stuff for cars.
but at least you've got one set, right?
good luck
Ian
if you need any GTS dimensions let me know
_________________
Bimota DB2 tricolore, Bimota YB4e.i, Ducati 851 tricolore, Ducati Hailwood Replica, 1968 Gitan Grillo sport, Yamaha GTS1000, Honda Deauville, Honda GB500 Clubman
http://thecrankcase.com

[oily]

Who....
just gotta say that I think your avatar is hilarious
_________________
SB6 mk1 (project mega light, big bore)
Sb6 mk2 ( Big Bore)
Sb6 mk2 ( Restored)
Sb6R fighter
Sb6 or Sb7 WANTED

[crankcase]

taking a bit longer than expected, actually I don't think I've done anything useful . .

continued to collect key rings



finally got a proper plastic YB4 job (bottom right), instead of those flashy leather things. Much more sporty and very eighties.

got a BMW fuel pump for the 851



which needs a sock on it to make it fit the hole.



but it means I can have my pump back please. Be able to get on with something.

Then we arranged for friend Bruno to make some films about the bikes, which would be a lot nicer with a 'complete and painted' YB4, at least in the background. So bike out of the living room


always nice to have a YB4 in the hall

repair all the fibreglass cracks that I ground out 5 years ago



so it will only crack in the places between the repairs next time

some filler





and a 2 day, spray can festival . . very rough and I only did the right side as it's all got to come off again to be rubbed down properly and prepared. Was missing a spray booth, proper materials and a few stress free days this time around. Anyway good practice.

Actually thinking about making some moulds before the final paint- if anybody is seriously interested in parts- we can talk about that. Who ?

gold goes on first- it's easier to mask for the next colour coat

looks a bit seventies!

then red



then mask that and chuck masses of white on



all over the place



even had time to get my new sign up- dooh ! sorry that's for another forum

then a few tape lines and stickers- easy as that



Missing YB4 logos- need to get some cut for the final job.
And I didn't get it exactly right- the gold line at the rear is a little too high and I think the area on the fairing where the big Bimota logo is is too high? good practice though.
Red is a bit dark on this pic- how about this one?



just don't look too closely. but it'll be ok parked at the back.





or even in the yard



eyeing up the competition, 1988 again.

Tardozzi versus Lucchinelli

here's Bruno Schneider from http://www.metropolisfilm.de/
being brilliant whilst getting temporary hearing damage from the 'kitted' 851.



lights, camera and umbrellas



excellent fun, glad it's over for now.
Off to Spa for the weekend, yeah
_________________
Bimota DB2 tricolore, Bimota YB4e.i, Ducati 851 tricolore, Ducati Hailwood Replica, 1968 Gitan Grillo sport, Yamaha GTS1000, Honda Deauville, Honda GB500 Clubman
http://thecrankcase.com

[Pompey]

Not sure what you did in a former life Cranky but you hit the jackpot this time around. Love it, and very impressive spray job!
_________________
Pomps
Bimota's Db2, Db5 ,Ducati's 851' 92, 888' 93, Honda blade' 93, Triumph speed triple' 07, kawasaki zxr 750 k1

[crankcase]

thanks Pompey
you'll see how rough it really is when you get here
unless I've already got it off again- but I'll get back to getting it running again first- bit more important, and with 'some' paint on it, it feels more like the final stretch.
and sorry you're going to miss out on Spa too- I only cottoned on a couple of days ago- nearly missed out, again.
all the best
Ian
_________________
Bimota DB2 tricolore, Bimota YB4e.i, Ducati 851 tricolore, Ducati Hailwood Replica, 1968 Gitan Grillo sport, Yamaha GTS1000, Honda Deauville, Honda GB500 Clubman
http://thecrankcase.com

[crankcase]

cancel all my previous posts !
it's paint job round 2
had to strip everything off again to sand it properly.
Found a custom sprayer in Frankfurt who still uses solvent based paint and will do it for 1500 euros, which is not bad these days. So long as I prepare it.
Local paint shop will blow on the primer filler for 50 euros- getting good.
Been held up ( a lot ) with boring day time things, and just finished a 3 day/squeezed in between other stuff valve adjustment and belt swop on the DB2, which is now running gorgeous : )
So while the YB4 body bits are at the painters, I'll sort out the wiring loom finally (promise) and get it all running and lovely for the tea party, 2 more YB4s are planned to come over on Friday 16th : )



looks like a 250 GP bike without the fairing and stuff
_________________
Bimota DB2 tricolore, Bimota YB4e.i, Ducati 851 tricolore, Ducati Hailwood Replica, 1968 Gitan Grillo sport, Yamaha GTS1000, Honda Deauville, Honda GB500 Clubman
http://thecrankcase.com

[philfingers]

jeez, the back disc on that 851 is huge Cranky!
_________________
03 YB11, 03 Aprilia RSVR Edwards, 94 Ducati Superlight III, 95 Honda NC30, 04 Ducati 999S, 91 kawasaki KR1-S C2, 91 Ducati 851 USD Strada, 89 ZXR750H1, 90 ZXR400H1, 205 16v Rally Car, A6 2.7TDI Avant, STM R1 engined Phoenix

[crankcase]

hi Phil
I think it's a 260mm
definitely a full floater- very period.
looks bigger because it's a 16 inch wheel
Going to change for a 17 incher with normal 245mm (?) Ducati wheel, along with the front- handling should be nicer, and I'll be able to get tires : )
Ian
_________________
Bimota DB2 tricolore, Bimota YB4e.i, Ducati 851 tricolore, Ducati Hailwood Replica, 1968 Gitan Grillo sport, Yamaha GTS1000, Honda Deauville, Honda GB500 Clubman
http://thecrankcase.com

[who]

Just passing and thought i would say hi!

1500 to put the paint on... Yikes! I thought what you did with rattle can was splendid.

I was having a conversation regarding the YB Bimbo's with a FZR enthusiast I know. We talked about how we spend a lot of time modifying and making our old road-bikes into racers, while the Bimota is a race bike that they put lights on for the road. The Bimota's are GP 100%.

I'm looking forward to seeing your YB4 finished. Cheers!

[crankcase]

painting is an expensive game- especially multi coloured jobs.
My local paint shop will only do cars !
but he will do the primer/filler for 50 euros.
My rattle can job was really just a quick make it look for the tea party last year- I can do tape lines- but the paint quality was 'low'
At least I get solvent paint for 1500 euros which is technically illegal in Germany- but the custom paint shop I found is allowed to use it because they only do small surfaces, such as bikes.
Solvent paint is much tougher in my experience- and I don't want to have to redo it again sometime.

and as you can see I've got to weld the missing brackets onto the front subframe.
any day now . . .

There are 2 other YB4 owners coming to the tea party in August- so that is the deadline.
3 others I know can't make it unfortunately- 6 bikes would have been stunning together : )

how's yours going who??
_________________
Bimota DB2 tricolore, Bimota YB4e.i, Ducati 851 tricolore, Ducati Hailwood Replica, 1968 Gitan Grillo sport, Yamaha GTS1000, Honda Deauville, Honda GB500 Clubman
http://thecrankcase.com

[crankcase]

front subframe repaired



finally somewhere to fix the clocks and support the upper fairing arms : )



and where to get nicely bent tubes and fittings the same size as a Bimota YB4 front subframe?



from a Bellaria front subframe of course- I know it's not exactly correct behaviour, but when needs be . .

and a bit of sanding going on . .
but I keep finding places that need repairing . .



this is never going to crack again.



relaminated rear mudguard area- the bit for the reflector had been 'cut off' : (



and this 'heel' guard/ tab thing has now got a moulding on the back to keep it from flapping about- the one on the left side pushes in- the right side was pushing out !

And got a nice oil filter fitting screw to repair the broken off thread on the original YB4 filter adaptor.



Need to drill and tap a 14 x 1.5mm thread, then reduce the height of the hex a bit- hopefully stronger than original.





and a very wonderful reader of this forum, who is also restoring a YB4- made a nice drawing and took some photos of the fast idle cam lever that I'm missing : )
Best to get it laser cut- wonder how much that is going to cost?
Unless somebody has one that they don't need?






Thanks Michael : )

It looks like I've got lots of 'other stuff' to do for the next 6 weeks though- so I'm losing hope of getting the bits to the painters within next week- we'll see.
And I'm desparately wanting to get started on the DB2 for the Glemseck sprints; already sorted out some nice indicators (spare GB500 bits : ) and some other odds and ends . . at least it's been so hot the last couple of days- the only 'cool' place to be was the barn : )
They reckon we'll have a storm or 2 the next couple of days- so it might mean sheltering in the barn : ))
there you go
Ian
_________________
Bimota DB2 tricolore, Bimota YB4e.i, Ducati 851 tricolore, Ducati Hailwood Replica, 1968 Gitan Grillo sport, Yamaha GTS1000, Honda Deauville, Honda GB500 Clubman
http://thecrankcase.com

[GeeKay]

great work Ian - looking forward to having a ride on that in August.
are you going to the Bikers Classic at Spa this year?
_________________
Bimota SB6 and Benelli TNT 899S road bikes.
Beta Techno trials iron. Project bikes:- Suzuki V4 500, TS185 cafe racer, XR11/71, Kettle/Katana, TDRGV250, OR50, Gag125,Triumph T595 and a Triumph X75 Hurricane replica.
Too many projects...............

[philfingers]

nice work, and i don't mean destroying a Bellaria!
_________________
03 YB11, 03 Aprilia RSVR Edwards, 94 Ducati Superlight III, 95 Honda NC30, 04 Ducati 999S, 91 kawasaki KR1-S C2, 91 Ducati 851 USD Strada, 89 ZXR750H1, 90 ZXR400H1, 205 16v Rally Car, A6 2.7TDI Avant, STM R1 engined Phoenix

[crankcase]