Damage assessment: Flywheel falling off

[He Man]

I am trying to assess the amount of damage i can possibly be dealing with after my flywheel came off.

shipping to NYC vs shipping to colorado is a matter of $100 bucks....

If the flywheel comes off, aside from the timing being all wacked out, what else can go wrong?

is bent valves and damaged piston the worst thing that can happen?

Can the timing on the belt side of the motor be messed up?

[suzyj]

I am trying to assess the amount of damage i can possibly be dealing with after my flywheel came off.

shipping to NYC vs shipping to colorado is a matter of $100 bucks....

If the flywheel comes off, aside from the timing being all wacked out, what else can go wrong?

is bent valves and damaged piston the worst thing that can happen?

Can the timing on the belt side of the motor be messed up?

I can't see how the flywheel could affect the belts or cam timing - I'd think the stator is likely to be damaged, and perhaps the side case on that side.

[He Man]

if the flywheel comes off, the smaller timing gear can come off and then the valves would stop working bu the pistons would still turn.

[Howie]

Your bike is the very first one I know of that skipped timing when the flywheel came loose.  You will need to pull the heads to ascertain the damage.

[He Man]

would a compression test or a leakdown test suffice?

[Ddan]

A good leakdown test would mean you're probably OK, but if you're certain you skipped timing and the motor ran at all, you really need to pull the heads.

[scduc]

After just looking at my service manual, I just dont understand how the gears on the left side would affect the timing on the right which control the valves. The only small gears are for the starter. I know that when I took the left side apart, there was a mark on the flywheel that matched a mark on the starter driven gear. My guess is that those 2 need to be aligned, but my concern would be did the flywheel come off while driving? In which case I dont even want to see the pics of what it did to the case and cover. I know from experience that the shifter forks are sensitive. A 2 to 3 lbs mass traveling at 4k RPM, not pretty. After re-reading the OP, I'm now confused. "If" the flywheel comes off. You do not know, is this just speculation? And what does shipping have to do with the flywheel coming or not coming off?  Need more info.

[brad black]

do you mean the flywheel came loose?  it can't come off unless the cover is not there.  remove the cover and have a look. for a timing gear to come off its key the flywheel would have to move off15mm or more, which it can't with the cover on.

[He Man]

I should rephrase.

the retaining nut came off the crankshaft and the flywheel ate part of my left side case. The smaller timing gear came must of came off the layshaft or the woodruff key somehow disengaged because the timing gear (which functions with the ignition pickup to give the spark) was not spinning, but the pistons were.

if the damage is too great, it is not worth shipping it to colorado (where i am currently) and would be cheaper to ship it home (NYC) so i can work on it when i have time.

Im working 65-90 hours a week right now so time off, is spent relaxing!

[brad black]

ok. 

if it has bent valves you won't be able to turn the cams.

if cams turn, refit the timing gear in the correct spot, fit the flywheel and tighten the nut and give it a comp test.

no one can answer these questions without seeing the engine.

[cokey]

For those not in the know..

http://www.ducatimonsterforum.org/index.php?topic=56816.105

Goodluck man..

[He Man]

Before i left the bike, i refitted the timing gears. There was spark. There was also a tick when i turned the engin over. But the motor would not attempt to pickup the spark. I removed the plugs and tried to see if i flooded fhe engin ( the plugs were not wet with fuel) I tried starting again. No joy.

[He Man]

do you mean the flywheel came loose?  it can't come off unless the cover is not there.  remove the cover and have a look. for a timing gear to come off its key the flywheel would have to move off15mm or more, which it can't with the cover on.

Since the woodruf key can move around, is it possible that the small gear backed off enough so the key cant engage the gear? I physically observed the timing gear. Ot spin but the flywheel was spinning. So the flywheel came loose enough to allow the small timing gear to not engage.

[He Man]

does this look like its in the right order?

[brad black]

the bush is the wrong way around.  it goes through the bearing, through the washer and locates in the recess in the timing gear.  is the key inside the timing gear ok.