Started Looking at My Paso Project Bike

delagem · Post by **delagem** » Wed Aug 02, 2006 2:09 pm

I believe I used http://www.bevelheaven.com when my son lost my carb choke jet, he seemed pretty knowledgeable. Bevelheaven, that is, not my son, turns out he stuck the choke jet into a plunger gun; I have to say it did shoot out pretty well...

DesmoDog · Post by **DesmoDog** » Wed Aug 02, 2006 2:50 pm

Desmo_Demon wrote:Anyone else have any good sources for Dellorto parts?

It's not uncommon for the front and rear cylinders to be jetted differently... they should be close, but not always the same.

These are a few places I've used for Dellorto parts:

http://www.bevelheaven.com/

http://www.mgcycle.com/

http://www.desmo.net/english-index.htm

The last one is in Germany - he's got a good selection of parts but you need to download the german price list (and search by part number) to see everything.

The guy who runs Bevel Heaven (Steve Allen) is a big supporter of vintage Ducatis. Actually Ducatis in general, but (not surprisingly) his shop focuses on bevel drive Ducatis, mainly the twin cylinder versions.

P.S. Looks like I need to resize the pic in my last post. Oops...

Desmo_Demon · Post by **Desmo_Demon** » Wed Aug 02, 2006 5:31 pm

I think I know why the instrument cluster was zip-tied to the bike......those vibration dampeners retail for $16 EACH!!! :thumbdown: I was figuring $5-$7 each. The huge one for my Harley can be had for about $2.50. My local dealer just had three in stock and gave me a "deal" on them for $12 each since they will probably never have to restock them.

Disappointing news is that the one exhaust ring that I need is not available anymore. This is the part that holds the pipe to the head. I'm gonna look around, but may get a buddy of mine to cut me one out of 1/4" plate steel with his plasma cutter. The inside groove may be easy to cut by making a holder and turning it on a lathe. I'll email a couple of places first, to see if they have one, because I can't picture anyone having a spare just floating around.

qldman36 · Post by **qldman36** » Wed Aug 02, 2006 7:07 pm

And here i was thinking of asking $2 apiece for mine! WRONG! :thumbdown:

DesmoDog · Post by **DesmoDog** » Wed Aug 02, 2006 7:17 pm

Desmo_Demon wrote:I think I know why the instrument cluster was zip-tied to the bike......those vibration dampeners retail for $16 EACH!!! :thumbdown:

It's been so long since I've seen my dash I've forgotten exactly what these things look like... if they're what I'm remembering them to be I'm guessing an industrial supply place like McMaster-Carr probably has them, and for a lot less than $16.

Desmo_Demon · Post by **Desmo_Demon** » Wed Aug 02, 2006 7:44 pm

DesmoDog wrote:It's been so long since I've seen my dash I've forgotten exactly what these things look like... if they're what I'm remembering them to be I'm guessing an industrial supply place like McMaster-Carr probably has them, and for a lot less than $16.

You can see a picture of them on the first page of this thread.....I thought the exact same thing about buying them elsewhere, and even told him so (not too sure how easily it would be to find metric thread, though). I thought of just buying one to get all the measurements, but I made a few extra dollars on some guitar cases I sold by getting a lower price on shipping. It offset the difference between the $7 I was thinking they'd be, and the $12 I paid.

Public Service Announcement - For future reference, the vibration dampening mounts for the instrument cluster have an M4x.70 thread with each thread section being 3/8" long and the rubber section 3/8" in diameter and 3/8" in length. I surfed through McMaster-Carr's catalog and the M4x0.7 with the same sized rubber or neoprene section but 1/2" threaded sections are Part #9376K111 and $1.50 each. This means that you can buy this part MUCH cheaper than the OEM, but you will have to cut 1/8" off of the threaded section that will go into the instrument cluster so you don't break the housing (it is a blind hole). I hope this helps save someone a few bucks in the future.

nilaus · Post by **nilaus** » Fri Aug 04, 2006 7:56 am

WouldnT it help to swap around the inlet manifolds?

They should look like this when the carbs are dismounted.

http://forums.ducatipaso.org/viewtopic. ... _photo.php

Regards
Klaus
Denmark

Desmo_Demon · Post by **Desmo_Demon** » Fri Aug 04, 2006 1:30 pm

nilaus wrote:WouldnT it help to swap around the inlet manifolds?

That's exactly what I plan on doing. I'm not too sure if I'll pull the carbs off this weekend or not. I may wait a couple of weeks. I ordered new intake gaskets that should be here next week, sometime with several other parts that I ordered. I'm still looking for an exhaust retaining ring, and have a good lead (Edit - I found a brand new one at ProItalia after my "lead" led to nothing). Worse-case scenerio is that I'll have to make one. I was hoping to put the exhaust back on the bike before I go ripping anything else off the bike. I'll have the instrument cluster back on this weekend. I try not to have too many parts scattered around.....makes it too easy to lose or misplace things.......or, you leave them off for a long enough time, you forget how it goes back together. :ugh:

Desmo_Demon · Post by **Desmo_Demon** » Mon Aug 07, 2006 1:44 pm

Vicki and I worked on the bike some more this weekend. Here's page two....

http://www.desmodemon.com/paso_project_1.html

Looks like we got most of the electrical issues taken care of, at least, according to the multimeter. I did run across one thing that I would like someone's opinion on.

The two pairs of wires coming from the ignition pickups are wrapped in a cloth-type material. This material is in very poor condition and falling apart. I removed a bunch of it and am debating if I should replace it with some type of insulating conduit. The reasoning behind this is that I know that, sometimes, when you have a wire with current going through it sitting parallel to an inert wire, a current can be induced into the inert one by the one with the initial current. Could this be an issue?

Now, I'm waiting for some parts to come in this week, and I'll have the exhaust reinstalled, then, it'll be time to pull the carbs and intake runners off the heads.

Desmo_Demon · Post by **Desmo_Demon** » Mon Aug 21, 2006 1:29 pm

Well....got around to messing with the bike some more this weekend. I took the vertical carb off and happened to look inside the head and saw this....

Comments?

qldman36 · Post by **qldman36** » Mon Aug 21, 2006 1:53 pm

Looks like the project just took on a new dimension. Is the valve frozen in the guide? This may explain why the intake system was slap dashed back together? Hope this is all you find on tear down.

Desmo_Demon · Post by **Desmo_Demon** » Mon Aug 21, 2006 2:05 pm

qldman36 wrote:Is the valve frozen in the guide? This may explain why the intake system was slap dashed back together?

Hmmmm...I didn't notice that. I'll have to look at it a bit more closely when I get home, tonight. I was mainly concerned about the intake porting. I'm used to seeing regular sand-cast marks, and this one looks like someone's bounced a die-grinder in there a little bit.

You're right, though, it does look like the guide is seized, unless the guide normally stick down that far. I'm not familiar with these heads and how they should look. I'll pull the other carb off, tonight, and compare the two. The engine turns over freely, so I don't think it would be an issue of the valve being stuck. Everything on the carbs/intake/heads was nice and tight, so if it was just thrown back together, they torqued everything.

qldman36 · Post by **qldman36** » Mon Aug 21, 2006 2:38 pm

Could be the grinding is just factory casting cleanup, on the other hand, if home grown attempt at porting, could be good, could be bad. Place to check is valve seat to head[in port] interface. If sharp edges, more than likely factory cleanup. Attempt at smoothing and blending would be more than likely done later. Although, don't remember back in the day if Ducati blended seat port area.[only tore down a few]

Post by **paso750** » Mon Aug 21, 2006 8:53 pm

yours look pretty much normal I`d say. These here were rebuilt and modified.

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Desmo_Demon · Post by **Desmo_Demon** » Tue Aug 22, 2006 12:59 pm

Cool.....Everything looks normal, compared to the other head. I'm just glad that this thing wasn't any more "Mickey Moused" than what I've seen, already. Here's the horizontal head's intake port...

I've cleaned the carbs and checked the jetting, and all looks well, there, too. I just need to buy a couple of rebuild/gasket kits. Looks like I'll be surfing a little bit today for the best prices and availablity.

Edit - The carbs are Dellorto PHF 36's and one is marked "MD" and one is marked "MS". The only difference that I can see is where the idle adjustment screw is located. Is there a reason for these to be different?

Started Looking at My Paso Project Bike

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