Which Tires Fit?

[CharlieR]

I researched topics on tires for my recently-acquired 750 Paso and the results were sort of vague. Does anyone have a recommendation about new front/rear tires available in the US that will fit? It seems the rear is the biggest problem, and it looks to me like a matched set (mfg/tire number) for front/rear is out of the question. I realize tire selection is an issue, but there must be something that works...
Thanks..

[higgy]

Most frequently substituted. I have not tried any of them. I am looking into converting my 16 inch wheels to 17 as a permanent solution


Avon Cobra AV72 (rear) 180/60R16 74H
Avon Azaro Sport Touring AV45-ST (front) 130/70ZR16


Conti Sport Attack-Hypersport 130/70 x 16 Front Tire
Conti Motion-Sport Touring Radial 180/60 x 16 Rear Tire

As a substitute for Michelin
Fr. A59X 130/60Zr16
Rear M59X 160/60Zr16

Many are working a a good solution

[randtcastell]

Ha, ha Charlie! Welcome to the developing story. The tires listed in the preceding posts may presents challenges in fitment, so move forward with caution or conduct more research. But, if you've got any miles left in those present tires of yours, we should meet. I'm in SF Bay area and would like to meet you at North Beach Trieste or Mario's for an espresso or beer and chat about our pasos. i'll tell you what i know about tires. just got my '87 paso recently as well. best, randy. Two Pasos in North Beach would be an excellent photo op. Maybe in front of Linguria Bakery with Focaccia! Best, Randy.

[CharlieR]

Thanks, guys. Randy, I'll get in touch when I fix the voltage regulator, which is apparently out as well.

[fredskidoo]

Hey Charlie and Randy - If you both would read my post in events:
http://forums.ducatipaso.org/viewtopic. ... 785#p28785
Then we can get three Pasos in a photo in front of Cafe Trieste



Mind you I'll have a slinky legged Lady ready to pose on my Paso

Charlie - If your in need of parts let me know.

Easy - Ethan

[randtcastell]

Hey Ethan, As soon as I'm back in town from Thankgiving holiday, let's meet up. who knows, we may even get along. A ride in west Marin is certainly in order for me and my Paso. Had a great blast on Redwood road/ East Bay today- beautiful weather! What tires you got on your beast? Best, Randy.

[ducinthebay]

Keep me posted, and I'll meet up with you also. Not on a Paso, but a 750 Sport.

Cheers, Phil

[fredskidoo]

Sounds good Phil and Randy

Hey Charlie, I sent you an e-mail with a parts contact here in California.

As for my tire strife. Well lets see . . .
I found an original Michelin 160/60 16 rear for $120 about 6 months ago and, despite
my tender care, is wearing faster than I care to realize - Denial is more like it! I'm currently
using a cheapo Maxxis 130/70 16 front - looks a bit "chopper" and I had to raise the front
fender 1/2 inch. I paid $20 for it on ebay. Strangely and quite unexpectedly it rides and
corners great. It's never behaved badly, unlike that slippery Michelin on the back!

I just picked up a flawless swingarm, due to the stripped bolt holes for the sprocket side cap
that holds the eccentric and axle in place, and plan to swap them and then proceed to modify
the front and rear ends to accommodate 17' Katana wheels - They look nice and its been done
right here at ducatipaso.org

Meanwhile . . . I'm about to go through the process of adapting a newer style clutch slave piston
to my 750 - we'll see . . . Any pointers anybody?

[ducinthebay]

Ethan,
I gotta ask why you want to change the clutch slave on your 750? Mine works great, and never given me any trouble, except when I try to bleed a dry system. I have some spare covers if you are in need of parts. Of course they come at a price, but a lot cheaper than what you are proposing.

Let me first make sure I understand your proposal. You want to put on a clutch slave from a newer motor on the left hand side of the engine?

I am trying to imagine what work it would take to put a newer slave cylinder on the older motor. First of course is mounting the new slave, which there is no accommodation in the older motor for it. You need to machine the cases smooth for the mounting and get the right location for the mounting screws. Second is getting the bore in the shaft machined smooth to accept the push rod. I doubt that the old shaft is smooth enough to allow an o-ring to live very long. The push rod needs to be shortened as the 5 speed motor is narrower than the 6 speed. Then there is the entire clutch mechanism that needs to be changed to the newer style, as the they work basically opposite in their action. I'm assuming that the clutch bits will fit on the shafts the same way, but I can't say for sure. Man, that's a pile of work. Even at e-bay prices, you are going to spend $500 in parts, or up to $1,000. You might you be better off getting a newer motor like a 900 and dropping it in? I know its easy on the Sport, I don't know if it will work with a Paso.

But then again, maybe I mistook your intentions. If you take a newer clutch slave and install it on the existing cover on the right hand side, you have a lot less work. You can pick up stock slaves for cheap on e-bay (<$20) there is a size issue, but it may work. All Ducati clutch covers have the same bolt pattern, so there are many to choose from. The other trick to figure out is how to get the piston pressure onto the release plate. All very solvable problems, with some ingenuity and a good machinist.

Cheers,

[higgy]

Guys there is no pushrod in either of my 906 clutches. the whole assembly is in the cover to cover clutch on the right hand side of the engine, or have I missed something in this conversation?

[ducinthebay]

Higgy, you are right. There is no pushrod, and that is the point I was making in the difficulty of adding a newer clutch slave to the older engine. Ethan's idea is to use a clutch slave from a newer version of the Ducati motor on the older version.
This is what he originally posted
". I'm about to go through the process of adapting a newer style clutch slave piston
to my 750 - we'll see . . . Any pointers anybody?"

Now I just assumed that he wanted to use the entire clutch slave cylinder assembly, but now I see he may be only talking about the piston.

If you try to put the newer clutch slave cylinder on the LEFT side of the older engine, like it is on the newer engine, there will a lot of modifications needed. One of which will be the push rod.

If you try to put a newer clutch slave cylinder on the RIGHT hand side of the older engine, then the biggest challenge is getting the force from the piston to the pressure plate. You need to make something new that takes the place of the pushrod.

Cheers,

[fredskidoo]

Ethan's idea is to use a clutch slave from a newer version of the Ducati motor on the older version.

The plan was to use the newer clutch slave piston, part #19520023B to replace the old piston, part #19520011B.
However, since the newer piston is used to push a rod through the case (on the 907's, I believe) from the left
side of the case to release clutch plate pressure it doesn't have a "mushroom" i.e. throwout bearing setup. It
just slips onto the end of the rod with a special metal in rubber type seal. (see below)



So, of course after re-reading several topics on the subject here at Ducatipaso.org and with the knowledge
of the inner constructs of the original (19520011B) piston now clear I am facing the daunting task of having to
build a mushroom and bearing assembly to fit into the newer type piston that will withstand the daily torments
of contact with the pressure plate.

The original piston (#19520011B) is constructed in this way.
1st - There is a seal on top.
2nd - after removing said seal, there is a "C" clip to remove.
3rd - you remove the C-clip, pull the "mushroom" out revealing a circle of loose ball bearings.
4th - after removing the mushroom and ball bearings you'll see on the bottom of the mushroom's shaft a vertical, cylindrical case of needle bearings surrounding the base shaft of the mushroom. So what you have inside the now empty piston is that it has a vertical wall, with a slot for the c-clip, ending in a rounded seat for the ball bearings. Then below the ball bearing seat there is an even narrower vertical wall that the needle bearing cage that is around the base of the mushroom fits in. Sorry - I know its a rather pointless description without an accompanying photograph but I made an attempt at drawing it below.




So the problem is that the interior of the newer piston type (see photo below) is very different and has a larger inner diameter so using you existing mushroom and bearings won't work. Other members have posted that they've built a new mushroom and used a 608-ZZ bearing but no one has produced a photo with all the parts and how they've assembled them (that I can find) and to what success . . . The images they've drawn of the fabricated mushroom are not at all like the original. How can you keep the mushroom seated in the piston with out a c-clip? Won't the bottom of the mushroom just sit on the inside of the piston and just wear everything away? So if anyone has any personal experience with using the newer #19520023B piston successfully please drop me a line rather than filling this thread with conjecture.


Thanks, Ethan

[Bijke]

Hello to you all,

I don't know if it is on this forum, but last weak i read a thread of a person whos did both sprocket conversion in his paso or 906. This wat included whit pictures. He can fit now an 180/60 r16 tyre. Hey was aligning it with a laser he brough from is work.

He dit also an mod on the rear sprocket, it was an exellent solution.

But in cant find it anymore.

[Duc906]

Here is a link to what you are after.
http://forums.ducatipaso.org/viewtopic.php?f=2&t=3191

[Bijke]

Many thanks Ken!!!