Search found 328 matches

by JWilliam
Sat Nov 27, 2021 1:15 pm
Forum: 906 Paso
Topic: Weber DCNF fuel pressure issues
Replies: 16
Views: 4503

Re: Weber DCNF fuel pressure issues

A problem to have fixed later is a slight wobble in the front rim. Very annoying around 50Kph and again somewhere between 100 and 140kph. Cheers, william I expect this is due to the steering head angle. If the head angle is too steep the bars will shake. Try and reduce the spring pre-load on the re...
by JWilliam
Thu Aug 26, 2021 11:30 pm
Forum: 906 Paso
Topic: alternative fuel pump
Replies: 18
Views: 22924

Re: alternative fuel pump

I placed a fuel pressure regulator after the fuel pump and found the changes in air temperature affected power output the greatest. Colder weather meant higher air density & oxygen, so on that day I would increase fuel pressure to the Webber. Just running it with a simple return line to the tank...
by JWilliam
Sun May 02, 2021 12:20 am
Forum: 906 Paso
Topic: engine dropping onto 1 cylinder
Replies: 7
Views: 4056

Re: engine dropping onto 1 cylinder

I replaced the ignition coils with ones from an Aprilia twin, 5 ohms resistance. I did this after running the Paso at the racetrack and picking up a misfire; due to over-driving the Digiplex. Your cutting out does sound like an electrical problem.
by JWilliam
Thu Dec 17, 2020 11:24 am
Forum: 906 Paso
Topic: Indicator lens
Replies: 4
Views: 7681

Re: Indicator lens

Has anyone tried 3D printing an indicator assembly yet?
by JWilliam
Sun Nov 08, 2020 3:22 pm
Forum: 906 Paso
Topic: Buying secondhand
Replies: 4
Views: 7072

Re: Buying secondhand

Non runners can be almost a basket case but in the case of Ducati they are usually a reasonable project. The only thing that affects an old bike is where it has been kept. Outside? Any motorcycle will only put up with that for a year or two before major damage sets in. If it is actually running with...
by JWilliam
Thu Apr 23, 2020 9:24 pm
Forum: 906 Paso
Topic: Ducati belt engines - a nasty secret flaw?
Replies: 6
Views: 9792

Re: Ducati belt engines - a nasty secret flaw?

This was a contentious issue back when the Pantah engines were raced. There were some after-market chain guards available. I made one for my 906 that replaced the plastic sprocket cover. It bolted on to the existing housing but had a steel band welded to the inside of the cover that ran along the ou...
by JWilliam
Sun Dec 29, 2019 11:59 pm
Forum: 906 Paso
Topic: Rear suspension unit
Replies: 6
Views: 5991

Re: Rear suspension unit

Really total wussies. Funny. Along with Ronald I suppose what I mean is if you have the right tools and can disassemble the shock, then go for it. If not then take it to the specialist - since bike parts are so minutely machined and delicate that one slip can result in a breakage or that its so mar...
by JWilliam
Sat Nov 09, 2019 2:23 pm
Forum: 906 Paso
Topic: Rear suspension unit
Replies: 6
Views: 5991

Re: Rear suspension unit

Don't be trying to work all this out yourself, find a local suspension specialist and drop it in for service. Motorcycle suspension is difficult to work on without the right tooling.
by JWilliam
Thu Jun 27, 2019 9:31 pm
Forum: 750 Paso
Topic: A thought that came to me
Replies: 7
Views: 5588

Re: A thought that came to me

The quality of the motorcycle is almost always reflected in the price. It is rare that you will ever buy a bargain, if it is cheap - expect plenty of work to restore it to a reliable and useful condition. Bikes are fairly easy to assess and it is equally difficult to 'hide' faults if you just test-r...
by JWilliam
Wed Nov 28, 2018 11:29 pm
Forum: 906 Paso
Topic: Replacing the Digiplex S2 on the 906 Paso
Replies: 17
Views: 19170

Re: Replacing the Digiplex S2 on the 906 Paso

Got my new Digiplex in the mail last week. Installed it yesterday, and went for a ride today. I've said this before, change the standard ignition coils to modern units from eg. an Aprilia. The standard coils have a very low impedance (<0.8 Ohm) that causes overheating of the Digiplex. With a high i...
by JWilliam
Tue Feb 27, 2018 3:14 pm
Forum: 750 Paso
Topic: lots of money ? no brains ? ........step right this way
Replies: 15
Views: 14013

Re: lots of money ? no brains ? ........step right this way

Though it would be nice if once we all bought Paso's they became a sought after forgotten era classic and worth $50k. I think there is every chance that early 'carb machines will climb in value the same as the car market has gone. The modern stuff has any amount of electronic trickery and it is onl...
by JWilliam
Thu Jan 04, 2018 2:12 pm
Forum: 750 Paso
Topic: Paso wheel restoration
Replies: 9
Views: 9054

Re: Paso wheel restoration

He is right about wet weather affecting the wheels. Recently I had a set of new tyres fitted and the shop (run by a friend) told me that minor corrosion on the bead seat had meant the tyre wasn't fully sealed. Happily only a rub-down of the seat was needed, I would have been happier to wait and repa...
by JWilliam
Fri Jun 23, 2017 1:59 pm
Forum: 907IE
Topic: Smoking problem
Replies: 7
Views: 6390

Re: Smoking problem

I think the likely problem is the exhaust valve guide showing wear. When the motor is stopped and cooled down this allows oil to seep past the seal and coat the valve. Hence, smoke on start-up.
by JWilliam
Wed Apr 05, 2017 6:26 pm
Forum: 906 Paso
Topic: weber manifold "what if ?"
Replies: 8
Views: 7844

Re: weber manifold "what if ?"

I doubt 'opening up' the manifold would aid performance in any way. Imagine that this were so, then air speed thru each throttle body would be reduced, leading to fuel mixture problems due to the reduced vacuum. Incidently, running the rear cylinder richer (cooler) is most likely due to it being hea...
by JWilliam
Mon Mar 06, 2017 7:06 pm
Forum: 906 Paso
Topic: Rear swingarm
Replies: 6
Views: 6754

Re: Rear swingarm

DO NOT USE Molybdenum Disulfide grease for any of the swingarm linkage bearings. Even the slightest heat will disassociate the Molybdenum from the Sulphur. The free Sulphur then forms SO3 which is particularly capable of bonding with Iron. Result? Heaving pitting to bearing surfaces. Actually, don't...