Restarting the original

discussions specific to the 750 Paso

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murphus
Posts: 105
Joined: Wed Jun 24, 2020 6:27 pm
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by murphus »

Might actually be 7.5mm. I seem to remember 8mm fitting loose and 7mm fitting tight. I'll see if I can dig out the leftover hose and check, bike's all together and as we know that's not an easy access item.
1973 BMW R75/5
1976 Suzuki GT185
1983 Lavarda RGS 1000
1988 Ducati Paso 750
1995 BMW K75
enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

Thank you, I'd greatly appreciate it. A quick google search led me to some 7.5mm braided fuel line at a John Deere parts store or I could just get some 5/16" for ease of searching.
murphus
Posts: 105
Joined: Wed Jun 24, 2020 6:27 pm
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by murphus »

These guys are my go-to for fuel line, crimp electrical fittings, and nuts and bolts. Their catalog is awesome.
https://belmetric.com/
1973 BMW R75/5
1976 Suzuki GT185
1983 Lavarda RGS 1000
1988 Ducati Paso 750
1995 BMW K75
enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

thanks for the link on the misc bits, I can see it'll come in very handy.

Haven't had time to do any work on the bike in the past week. Finished doing some major maintenance (doing it myself) on my Golf; T-belt, water pump, transmission service (auto) and other small items. I'll be back to messing with the bike this coming week and uploading a bunch more pictures.
enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

One of the many items to replace is the hose for this. Gonna be fun but all I have to do is really just find one straight section and another with a 45deg bend.
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Might just get a new one of these because who knows if the inside has any issues.
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On Ebay I was able to score two 36" pieces of this hose to eventually replace the originals as the case is cracked on one. Right now, it's just get the bike going and verify it'll run before I tear into it and find I can't fix it. Looking into the barbed connectors for these hoses and well, that was a rabbit hole adventure!

I'll eventually get around to finding the smaller hose that connects the left and right coolers. Then I'll worry about learning how to connect them- probably find a spare set to practice on before removing the originals.
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enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

The worst crack/ tear in the casing to one of the cooler hoses.
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Just when I thought I had the Y-pipe situation all figured out by finding the OEM part number part online out of Australia, it's too big. This is where I think all hoses were to be 8mm but as you can see from the OEM part on the left, I need a 7mm y-pipe to fit that stinking little return jet and hose back to the tank.
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Mc tool
paso grand pooh-bah
Posts: 1906
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Riverton New Zealand

Re: Restarting the original

Post by Mc tool »

You can just lengthen the return line to provide resistance . Mine is smaller dia ....I think 3mmID and about 750mm long , cant remember for sure
I wish I was young again............Id be heaps smarter than last time
enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

Novel idea about changing the hose length and size for resistance. Might have to look into that one, thanks!

Thought I might add another photo dump from previous progress pictures.

After figuring the timing belt out and getting that all situated such that I feel comfortable with it, it was time to turn it over. Stuck the key in the ignition and turned the power on and nadda.... no connection. Did a little bit of research on the forums here and found about the continuity issues and to properly take the ignition cylinder apart to clean it. Sure enough, mine was nasty. Used some scotch-brite and cleaned the contacts up.
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Cleaned up nicely.
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These don't look like fun to remove so I'm just going to leave them right there.
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All nice and much cleaner to get some juice flowing through
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enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

Found the ignition wiring diagram online so I knew where to stick the jumpers later.

No idea why it's upside down, I uploaded the only right side up picture.
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enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

Hooray, I have power!!
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Had to clean the contacts on the run switch to get it to consider cranking over
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Because who doesn't love to sip on an espresso while tinkering on your bike?
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Little bit of a hazy light here, time to bust out the super extended cotton swabs and cotton wipes.
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enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

Much better!
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This was quite the pain but it's much cleaner now.
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One night I went down the rabbit hole looking up these headlights and it seems the later Paso's had the better lens for reflecting the light. Tempted to buy a NOS one I saw on Ebay from a 907ie just because it's NOS. :lol:

I did notice that on this bike it does have the extra plug at the main beam plug but for the city light, yet this headlight has no provision for a city light. Another one of those things where it has the option for it, might as well use it right?

I've since been able to crank over the ignition and get the following PSI readings. Not bad for an engine that has sat for about 18 years! Engine currently is full of oil, and I've occasionally been hitting the start button to circulate it.

Vertical Cylinder
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Horizontal Cylinder
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I'd post a video, but I'll see if I can play with the video settings so that it can be uploaded or something.
enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

As I delve more into seeing what parts need to be replaced before starting this up one of these days, I'm wondering about the fuel level sensor. Think I might just buy a new one since it should come with the rubber gasket and I'd rather put a new gasket in there than trust one that's been sitting for who knows how long since being removed last, if ever.

The fuel lines and connecting pieces are sitting on the backburner right now as I take care of other items.

Oh, I'm working on a small offset washer to readjust the position of the exhaust pipe where it attaches to the rear hanger a little. As it sits right now, the rear brake lever, at full extension, ever so slightly taps the exhaust pipe and well, that just irritates me. I'll take some pictures to what irks me later and show y'all what I mean.

Also on the to do list is a clutch slave cylinder rebuild before I add oil to it. Need to read up on doing that and seeing what all to replace.
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englishstiv
paso grand pooh-bah
Posts: 1117
Joined: Wed Apr 09, 2008 9:57 pm
model: 907 I.E.
year: 1992
Location: Manchester, England.

Re: Restarting the original

Post by englishstiv »

Really enjoying this journey well done thus far.
DUCATI 907ie 1992
HARLEY DAVIDSON ELECTRA GLIDE CLASSIC 1991
Ducati Streetfighter 955 V2
enginerd
Posts: 20
Joined: Fri Jun 25, 2021 3:18 am
model: 750 Paso
year: 1988
Location: USA

Re: Restarting the original

Post by enginerd »

Thanks! This is turning out to be a fun small-ish project. Best part is that everything is complete and there, just needs updating old parts and a good cleaning. Right now I just ordered a few small bits from Bevel Heaven and soon I'll get the fuel sensor from AMS Ducati.

Still need to search if there's any other Ducatis that have the right size case breather hose I can cut up. Might as well go used to chop one up to utilize only the angles needed.
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higgy
paso grand pooh-bah
Posts: 3346
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model: 907 I.E.
year: 1992
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Re: Restarting the original

Post by higgy »

:truck: :choo: Be sure to check out the various articles on wiring updates particularly the installation of relay to protect that work you did on your ignition switch
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires :roll:
88 750
90 906
92 907ie
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