Joined: 05 Nov 2017
Location: Vale of Glamorgan, South Wales
|Posted: Sun Nov 05, 2017 12:21 pm Post subject: 'New' BB1 : Longterm Project
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:
1.1 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.
2.1 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 Ive 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
3.1 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.