Bevel Gear Damage Question

[kmev]

The cam nut is left hand thread, but I think you're next step should be the purchase of the Ducati factory service manual. It will save you a lot of money and headaches in the long run: https://shop.bevelheaven.com/detail.aspx?ID=665

It seems you have two singles and are in this for the long haul, so a parts manual will be helpful to, but that (and other helpful manuals) is available here: http://www.ducatimeccanica.com/#manuals

[blaat!]

I agree with kmev. I think it is available cheap on eBay. Worth every penny.

[guzzijon]

You guys are right of course. Thanks for the links!

[joe46ho]

Jon,
1-you DO need to buy a factory service manual, and you should have a parts manual although you can use the one on this site also..

2-I usually use the method that Matt described, just be careful, and yes its left hand thread

3-like Eldert said, those are w/c 250 gears, and are the wrong length, plus i have a ton of n/c stuff, and so does Jeff (krupp13) and a few others i know of, I wouldnt buy anything new unless you have to (aside from the obvious like gaskets/bearings/piston rings/etc...)

4-If your cam doesnt have a roll pin, thats not unusual, but I would fit one when you re-install it... Its a 5mm roll pin, and it does help increase oil flow to the cam lobes/rockers where its desperately needed... if you look at mcmaster-carr or a similar catalog, they will call it a 5.4mm roll pin (which is the nominal o.d. before you tap it into the hole)

5- mark/catalog ALL the shims you remove, and also MARK the flywheel, as stated before...

pm me if you need any parts ill let you know what I have, it will probably save time if you disassemble the entire engine, mark, clean, and inspect everything, then make a list of everything you need at once, instead of trying to source one piece at a time...
Is this going to be a "trailer queen" or ?? I only ask because I have a couple sets of bevel gears that are probably better than what you have but arent fit to sell, in my opinion... I would give you a set like that for free... but if you plan on riding it much, I would install a better set...

Joe

[double diamond]

Jon,

Now that we've gotten to the stage where we're spending your money for you, you need a flywheel puller. It'll work on the SCR as well as the Monza and save you a lot of grief. Should only cost about $50-$60 and money well spent. Several to choose on ebay or buy direct from MBS mfg. Be sure to get the narrow case type (wide case has larger dia. threads). Joe offers some good advice for you; take the whole thing apart carefully, record shim locations, don't pry or beat on anything to get it apart. There are good approaches with imprivised tools to disassemble the entire motor without any heavy handedness, you won't have to spend a fortune on tools and you won't destroy any parts. La forza! Matt

[DanM]

Looks like the flywheel puller and several other Ducati special tools are on sale.
http://mbsmfg.com/dutoandac.html

[guzzijon]

Jon,
1-you DO need to buy a factory service manual, and you should have a parts manual although you can use the one on this site also..

Is this going to be a "trailer queen" or ?? I only ask because I have a couple sets of bevel gears that are probably better than what you have but arent fit to sell, in my opinion... I would give you a set like that for free... but if you plan on riding it much, I would install a better set...

Joe

Thanks for your kind offer. The Monza will be more of a rider than a "trailer queen", though we do want to get it looking as good as we can cosmetically but not restored to 100% stock looks in any way. It will be more of a race-replica looking thing. And I plan on riding it pretty hard on the local mountain roads once it is finished. I'm excited about riding something that weighs 250 pounds with close to 30 horsepower. Is that a realistic goal? I figure if we are going to go to all the trouble of tearing the motor down all the way we may as well put it back together with some high-performance parts - higher compression piston, carefully set squish, hotter cam, good valve job. My theory being that it doesn't really cost that much more for the hi-perf parts than the stock parts (as long as we can find them).

The Scrambler we would like to try to restore to 100% stock looks eventually, realizing that it will take us years to hunt down all the missing parts. But I'd also like to be able to ride it hard some day, but knowing that I can't really abuse it like a dirtbike. Though I do have the fantasy of racing it in the premier class of vintage motocross just for a hoot. You know, try to make it around the track without hurting it or myself (I used to vintage motocross a '77 Yamaha YZ400).

Thanks again everyone for all the great advice and information! I'm trying to soak it all in like a sponge. Part of the fun of these things for us is being able to learn about something new.