[Ducati] Timing pickup question ...

[Rich Roberts]

I can not comment on all aspects of this problem or maybe to the extent that Art can..I will tell you this that on some of the older 916s etc the pickups were especially sensitive to shimming, too close was a problem. My old 916/955 had an occassional miss, the only shop the only time it was in a shop was when Bruce and Kyle were working together at BCm and I got to spend a day with both of them, Kyle doing most of the work with Bruce in the close shadows. Bruce heard that ever so slight and occassional miss and knew right away waht to do, we put another shim on the rpm pickup and it cleared up. it already had one factory instaqlled shim which I had never messed with. PU was in fine shape and worked, it just did not like being too close. It never made contact with anything and I think the cleance was within the factory spec, but another shim of equal thickness to what was in place which might have ended up being another .005" or something of that sort and all was well.
 Might not hurt to experiment with different thickness shims. Usually you can make shims, could be made out of oiled paper or thin brass stock. Mic and try adding a bit and see if that helps. Also in the early shop manuals were quick and easy methods of testing output of all sorts of sensors.  Have  a look or I will take a peak in my old grease smeared copy that is around here somewhere. Rich

Art Ramos <hyperpastabiker at gmail.com> wrote:  Funny you should mention this Brad.

Ford Diesels have know issues with the 7.3 cam timing sensor. Same principal
of operation. Ford or International had a bunch of them fail, their cost was
like 200 bucks for one from the dealer. More that failed, the more the truck
community complained with stories of near death experiences when the sensor
failed. Owner would carry a spare in the glove box just in case of a
roadside failure. Ford introduced a replacement sensor you can buy today for
25 bucks and they can be had on the Internet for 15. Funny thing is the new
sensor doesn't fail with the regularity of the old one and from what I've
been told the air gap is of no issue anymore as the newer sensor is more
sensitive to magnetic field changes. They built a better and more reliable
sensor, cheaper! Or they dropped the profit margin to quell the uprising of
folks who wanted to file reports with the NSTA.....

More than likely the Ducati pickup is minimally designed for it's
operational window and when it grows weary over time it's performance is
compromised or made apparent. Rather than just fail it screws with you!
Although it is a much better way of failure that it's brother on the diesel
engine which hangs you out on the side of the road in the middle of nowhere.



On Dec 1, 2007 3:54 AM, Kerry and Brad Black 
wrote:

> not sure if you can measure resistance while the engine is running (never
> tried) but i expect it'll be the pick up. they either won't idle on two,
> but run on two when hot or drop one just off idle. dunno why, that's just
> my experience with them.
>
> brad
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-- 
Art Ramos

2005 999R
1999 996 Mono (Frankenduc)
1999 944 SSie (Angryduc)
2006 650R Kawi (Sushi)
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Our newest sponsor, MC Stands, has just opened its doors! It's a motorcycle
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shipment. Whether front stands, rear stands, paddock stands, dirt bike
stands, or any kind of stand or lift, MC Stands tests, rates, and discounts
everything they sell. Check them out!

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