For those that are contemplating overhauling their Paso engine I have compiled a list of roller bearings and oil seals that are required for the job. The part numbers and detail positions were taken from the original 906 parts catalog.
Enjoy!
Ken (Duc906)

Gearbox
Position.....Ducati Part #....Description.............Size...........Quantity
4.............70120011A.....Split Needle Roller....K24x28x10..........5
17............764020002.....Split Needle Roller....K22x26x10..........1
Clutch
19............46340269A........Oil Seal.............35x47x7.............1
21............751132566........Bearing.............16005................1
23............46370226A........Bearing.............6005..................1
Clutch Cover
17............937842030........Oil Seal............20x30x7..............1
26............46340477A........Oil Seal............75x95x10.............1
Timing (Belt Tensioners)
20............037029350.......Idler Roller...........?**..................2
25............751661238.......Bearing................6201-2RS2/LHT23 ................4
Crank cases
4..............751423380........Bearing.........7207 X2TB (NTN)......1
7..............751302566........Bearing............6305 C3...............2
8..............937832552........Oil Seal............25x52x7..............1
9..............757911747........Bearing............NJ203EC..............2
12............751102054........Bearing.............6004 C3..............1
30............757941542........Bearing..........RNU202 ECP............1
32............751433380........Bearing.........7307 X2TB (NTN).......1
34............937851830........Oil Seal............18x30x7...............1
Water Pump/Alternator Cover
4..............751101747........Bearing............6003 C3..............1
9..............751202374........Bearing.............6001..................2
18............937831524........Oil Seal............15x24x7..............1
26............937831624........Oil Seal............16x24x4..............1 (CORTECO 12010799B)
28............937831625........Oil Seal............16x24x7..............1 (CORTECO 12010801B)
Starter (Driven Gear)
21............061950075.......Needle Roller.....K35x40x13............2
Head Timing (Cams)
12............020470105........Oil Seal............22x35x7..............2
14............751101747........Bearing............6003 C3...............2
19............751102054........Bearing............6004 C3...............2
24............751731542........Bearing............6202 RS1 C3.........2

(As always, this info is given in good faith. All care, no responsibility)

edit by G.:
The waterpump gasket is #78810063A and the same on
Ducati 748 `99 SPS
Ducati 748 SP, Biposto
Ducati 851 Superbike Racing `91
Ducati 851 `90 SP
Ducati 851 `91-`92
Ducati 888 Superbike `92
Ducati 888 `93->
Ducati 906 Paso `88
Ducati 907 I.E. `92
Ducati 916 `94
Ducati 916 Monop.-Senna `95-
Ducati 916 SP `96
Ducati ST 2 `97

that's brilliant Ken, thank you.

Most of the bearings (actually all) can be purchased from the SKF catalogue (the Ducati bearings are SKF standard bearings) for 1/3 of the Ducati list price.

few years back I did two engines, one was my SS-Special750 and the other was an 851 and most of the bearings were the same; the total expenditure was around 130-150 US$ for SKF parts.

it is a little bit fiddly to find all the SKF part numbers as you need to remove all the bearings from the engine, but it is very duable and the saving is substantial.

Just type the bearing number into google and you will find a good loac source. For example:

now thats quite a little list there and the money saving tips are a big help too! just gotta persuade my mechanical mate that he can do it when he gets back from his holidays. what are the most difficult proceedures involved in the complete overhaul?

apart from tolerancing (as mentioned) removing some of the bearings in blind housings can be fun.. aligning crankcases and spigots on re-assembly is another, also fitting pistons to barrels needs plenty of patience until you learn the knack - the expander springs in the oil scraper rings can be hard to compress sometimes. BTW, (in my opinion) I would definitely stick with these type of oil scraper rings and don't be tempted to use the aftermarket st. steel type.

thanks for the tips guys sounds a little tricky in places!!!!!!!

This ring compressor has been real handy over the years. The band is about 35mm wide and comes apart, and can be fed in round studs, clamp the rings and slide cylinder over the rings then remove compressor

a good piece of teflon or delran and a few well placed wire ties can do the trick in a pinch .......