SS 916 Cafe Hybrid

[knappers]

Been trying to build a bike out of bits, managed to get
this thing together, sort of. Had some good info off you
guys especially Cornerspeed its running now but need more please.

916 frame, 2 valve engine standard alloy swing arm.
Think its got the lighter front wheel. 916 tank, seat unit no fairing.
Its been running open carbs, rubber trumpets no filters 148 main jet.

I'm guessing the lower shock mount should have a
spherical bearing (not plain?) with top hat bushes??
This one looks to have been bodged, someone using
washers between the shock bearing (plain) and swing arm
mount. Found them after I removed shock (had to make a
stand first to get it off the ground) to check valves.

Taking me a long time to get it done because I had an
off resulting in broken vertebrae, abscess 3 years ago,
but that's another story.

Thanks for any info

[skidlids]

Are there meant to be some pics or a link

[Iconic944ss]

Oddly enough, I was only trying to find a thread on a 916/SS a few weeks ago and managed to find it:

http://www.speedzilla.com/forums/ducati-image-gallery/56412-new-old-rebuilt-91-ss.html

As for the swingarm bearing, I thought it was a plain sleeve but its been too long since I worked on my bike as this parts page shows:

http://www.ne.jp/asahi/ducati/toolbox/D-data/900ss/29.gif

[knappers]

Are there meant to be some pics or a link

Been trying to, tells me they're too big to upload

[knappers]

Thanks for the info, Id seen a similar one but still doesn't make it that clear to me. There is a lot of clearance between the shock mount eye and the swingarm mount on my set up, probably have to get some sort of bushes don't like the idea of the washers in there. Trying to get some pictures of it uploaded.
Mind you after seeing how good that one in the link looks don't expect the same of this one

[antonye]

Been trying to, tells me they're too big to upload

Read this:
http://www.ducatisportingclub.com/showthread.php?t=85276

[knappers]

Taking me ages to get these Fxxxxxg things uploaded ill do some more later, but you can get the idea of what Im trying to do. No where near finished.
can someone just point me to where I can see correct fuel pipe / pump connection to underside of 916 tank, want to run it with tank on. Thanks

[skidlids]

749/916 Pumps usually have one of two types of hose connections, either a banjo bolt and steel pipe that the hose pushes on to or the quick release fuel couplings like these

http://www.ebay.co.uk/itm/MOTORCYCLE-QUICK-RELEASE-FUEL-LINE-THREADED-COUPLING-/300650004384?pt=UK_Motorcycle_Parts&hash=item460022ffa0

748/916 pump unit is fitted with a 3-bar fuel pump and a matching 3-bar fuel pressure regulator to suit fuel injection

[knappers]

749/916 Pumps usually have one of two types of hose connections, either a banjo bolt and steel pipe that the hose pushes on to or the quick release fuel couplings like these

http://www.ebay.co.uk/itm/MOTORCYCLE-QUICK-RELEASE-FUEL-LINE-THREADED-COUPLING-/300650004384?pt=UK_Motorcycle_Parts&hash=item460022ffa0

748/916 pump unit is fitted with a 3-bar fuel pump and a matching 3-bar fuel pressure regulator to suit fuel injection

Skidlids
Does that mean this carb 2 valve won't run properly with this tank?
Trouble is I don't know how it ran before, I bought it in bits not running along with an M900 for the motor.
The outlets on the under side of the tank had 2 long pipes 13" long then a Y connector and another pipe approx 9" long to the carb rail way too much pipe under there. Also red and black connectors wired up to the pump?
I've had it running pouring fuel down the rail, starts very easily rear cylinder quiet, front sounds like I've dropped a spanner down plug hole. No smoke.
Any info on how to do this tank please, have to get it finished now.

Thanks for everyone's help

[antonye]

SS carby have a low pressure pump that switches with the ignition.
You should be able to swap out the high-pressure 3bar pump for an original SS one without too many problems.
There's been a few conversions on here in DD using 916 tanks, so someone should be able to help.

[knappers]

SS carby have a low pressure pump that switches with the ignition.
You should be able to swap out the high-pressure 3bar pump for an original SS one without too many problems.
There's been a few conversions on here in DD using 916 tanks, so someone should be able to help.

Thanks for the info. Can I tell by looking down the filler cap if its already been done, as far as I know this engine has been run with these carbs and tank for some time. Although it hasn't been rum for a couple of years.
Been looking through forum, in one post it mentioned a pressure regulator.

Done a bit more reading, not sure the fuel pipes are attached correctly to the tank. Is there a pic / drawing anywhere of the underside of tank?

[skidlids]

PayneP ran a 3 bar pump/tank combo on a Class B carby a few years ago at Brands after breaking the front end off his 620 Injected Class A bike and it ran without any problems, although that was only for one day so in everyday use you it might cause a few carb flooding problems

Easiest option would be to change the fuel pressure regulator in the bottom of the pump to a lower pressure item, then any pressure over that from the pump would bleed back to the tank, changing the pump wouldn't hurt but may not be necessary.
maybe some of these items have already been changed

[knappers]

PayneP ran a 3 bar pump/tank combo on a Class B carby a few years ago at Brands after breaking the front end off his 620 Injected Class A bike and it ran without any problems, although that was only for one day so in everyday use you it might cause a few carb flooding problems

Easiest option would be to change the fuel pressure regulator in the bottom of the pump to a lower pressure item, then any pressure over that from the pump would bleed back to the tank, changing the pump wouldn't hurt but may not be necessary.
maybe some of these items have already been changed


Is the round Held in by circling with webber stamped on it the regulator?
Not near tank / bike at moment can't go check. Could do with looking at at a drawing.
I'm sure it's run like this before, how we'll or bad I have no idea. That's what you get from buying them in a pile of bits.

Really wanna get it mot and ride it this week should look quite good with some sort of clipons. Thanks for your help

[skidlids]

Is the round Held in by circling with webber stamped on it the regulator?


That's the one held in place by a circlip, should have the rating on the side of it, if its the original it should have 300 kpa on it (not sure if they marked any as 3bar)

[Iconic944ss]

http://www.ne.jp/asahi/ducati/toolbox/D-data/900ss/32.gif

[antonye]

Here's a pic of one - has 300kpa on the side so it's for fuel injected.

http://tpoparts.com/cat093/image/data/S_0000294_000000.jpg

If you're using the 916 tank then it's part of the fuel pump assembly, so easy to check underneath:

http://www.ducati.ms/forums/attachments/ducati-motorcycle-chat/90936d1307254940-too-much-fuel-pressure-fuel-pressure-regulator.jpg

[knappers]

Here's a pic of one - has 300kpa on the side so it's for fuel injected.

http://tpoparts.com/cat093/image/data/S_0000294_000000.jpg

If you're using the 916 tank then it's part of the fuel pump assembly, so easy to check underneath:

http://www.ducati.ms/forums/attachments/ducati-motorcycle-chat/90936d1307254940-too-much-fuel-pressure-fuel-pressure-regulator.jpg



It's the 300kpa one. Got some pictures ill upload as soon as I've resized them.
How is that plumbed into the fuel pipes? This one has two pipes coming off the in and out to a Y connector then 1 pipe to carb rail. Fuel runs out of the pipes not the regulator.

[knappers]

Tank underside

[antonye]

One is feed and one is return.

[knappers]

One is feed and one is return.

The pic you sent me, is that quick release push fit into the out and return?
This tank just has male spigots screwed into tank, fuel lines pushed on.
What about the other 2 protrusions? Seen a video on you tube looks like they're linked by a pipe but hard to see. Thanks

[knappers]

One is feed and one is return.

The pic you sent me, is that quick release push fit into the out and return?
This tank just has male spigots screwed into tank, fuel lines pushed on.
What about the other 2 protrusions? Seen a video on you tube looks like they're linked by a pipe but hard to see.
Thanks

[skidlids]

One is the overflow and the other is the breather

[knappers]

One is the overflow and the other is the breather

Thanks, So they can be connected breather run down to bottom of engine.

The feed and return, how are they set up? On this tank they are connected to single pipe before running to carb inlet. That's how it came to me.
It has been badly messed around with the wiring is really bad I'm surprised it runs at all.
So if i connect it up as is 2 into 1 to carbs in theory should work, carbs might flood / leak because of regulator?? Thanks

[knappers]

Trying to upload video to youtube, not having success.
Haven't done much more with it, had too many other things on.
3 munkeees under 3 1/2 doesn't help.
Try get more done next week, thanks for all the info so far.

[knappers]

I've managed (at last) to get a video on youtube, nothing special just its first run after putting it together.

Type in Ducati Bitsa first start