Timing marks & the Ducati ignition

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Timing marks & the Ducati ignition

Postby S 854 » Mon Jul 08, 2013 4:58 am

Having broken out and dusted off my 1980's vintage timing light to check my son's mis-firing Civic, I thought I'd poke the light at the Arctic's Ducati ignition...

I found two arrows, roughly ¾" apart, along the circumference of the flywheel...

One would be ' TDC ' with the second being the correct ignition timing... no?

As the flywheel is rotating through the window, the first arrow to appear would be ignition timing (ignition advance) with the closely following second arrow being TDC... eh?

Currently, I've got the 'second arrow' centered in the window at idle... firing the cylinders at TDC? ... not good... (the advance works smoothly as the RPM's climb...)

The Arctic's running pretty darn good (dang... I just jinxed meself... :shock: ) but has always seemed a bit down on power compared to my riding companions... maybe a bit of timing change is in order here? Or am I missing something?
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Re: Timing marks & the Ducati ignition

Postby on2wheels52 » Mon Jul 08, 2013 7:13 am

I gather there are differences on which side of the engine the mark is located (and the type of mark?) but on my '10 there are two arrows accessed on the RH side. The second arrow (both can be seen at the same time) is TDC. The first arrow is where 'static' timing should be set (think it is 4 degrees BTDC) for most ignition systems.
I would think your Artic would run a bit better with the advancement; might have to make an idle adjustment.
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Re: Timing marks & the Ducati ignition

Postby co_g30 » Mon Jul 08, 2013 8:31 am

Craig, the guys at Raceway told me to use the second arrow as TDC for the powerarc. I would think it'd be same for the Ducati?

I guess one way to tell is to use the drinking straw or thin screwdriver method in the sparkplug hole and see which arrow lines up when the piston is at TDC?
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Timing marks & the Ducati ignition

Postby berger » Mon Jul 08, 2013 9:09 am

Go to myural.com, or search on timing mark. Question comes up a lot.

http://myural.com/valve%20adjustment.htm


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Re: Timing marks & the Ducati ignition

Postby Coluralado » Mon Jul 08, 2013 9:27 am

Keep yer shirts on! :lol:

Guess I'll have to do a timing video. When looking at the marks on the flywheel through the hole on the right side of the bell housing. The first one to come in view is the timing mark (it should have a 0 next to it). The next mark to come into view is TDC.

When timing a Ducati ignition using a timing light....the timing mark should be smack dab in the middle of the window at idle (800-1000 rpms).

If you want to check the advance....dial in 18 degress advance and throttle your rig up past 2000 rpms. The timing mark should be smack dab in the middle of the window.


The only time you should be using the TDC mark on the Ducati ignition models is when you are adjusting valves.
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Re: Timing marks & the Ducati ignition

Postby Coluralado » Mon Jul 08, 2013 9:30 am

The PowerArc module is set with the engine at TDC. This is a static setup. If you could check the timing of the PowerArc with a timing light, at idle you would see the "timing" mark smack dab in the middle of the window.

Don't want to get the two ignition systems confused when it comes to setting timing.
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Re: Timing marks & the Ducati ignition

Postby Coluralado » Mon Jul 08, 2013 9:31 am

So by your description Craig, it sounds like your timing set up is a little retarded.
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Re: Timing marks & the Ducati ignition

Postby JPanyon » Mon Jul 08, 2013 9:58 am

Hope I'm not being bombastic: older rigs had the timing window on the left side of the engine. Newer units have the window on the right side. The FIRST mark to show in the window is the 5 degree advanced timing mark, SECOND mark is the TDCenter mark.

Whether that timing mark is on the "top" or "bottom" of the TDC mark... depends on which side of the rig the observation port is located. Clear as mud, eh?

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Re: Timing marks & the Ducati ignition

Postby Coluralado » Mon Jul 08, 2013 10:01 am

JPanyon wrote:Hope I'm not being bombastic: older rigs had the timing window on the left side of the engine. Newer units have the window on the right side. The FIRST mark to show in the window is the 5 degree advanced timing mark, SECOND mark is the TDCenter mark.

Whether that timing mark is on the "top" or "bottom" of the TDC mark... depends on which side of the rig the observation port is located. Clear as mud, eh?

John Panyon
'02 750 with port on the outboard (left) side



So no matter how you look at it, the first mark to show up in the window (whether the window is on the left side or right side of the bell housing) is the timing mark.

BTW - I was told by the mothership that the advance is 4 degrees (maybe that has changed with different ignition types)? :?
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Re: Timing marks & the Ducati ignition

Postby gobium » Mon Jul 08, 2013 10:28 am

Video ? Darrell? :beerchug:
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Re: Timing marks & the Ducati ignition

Postby Coluralado » Mon Jul 08, 2013 10:36 am

gobium wrote:Video ? Darrell? :beerchug:



Tonite!
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Re: Timing marks & the Ducati ignition

Postby Swordsman » Tue Jul 09, 2013 8:52 am

Stupid question, but WHERE do you adjust the static timing? I hate to admit it, but this is the one service point I've shirked from the beginning. :oops: I think mine is a bit low, based on what a better mechanic than myself has said about my plugs.

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Re: Timing marks & the Ducati ignition

Postby Coluralado » Tue Jul 09, 2013 9:44 am

Swordsman wrote:Stupid question, but WHERE do you adjust the static timing? I hate to admit it, but this is the one service point I've shirked from the beginning. :oops: I think mine is a bit low, based on what a better mechanic than myself has said about my plugs.

~SM



Do you have the Ducati ignition? If so, go to...viewtopic.php?f=5&t=29226
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