What is the mark on the vertical cylinder for TDC on the DS1K mill? It's easy to spot on the horizontal sylinder, not soo much on the vertical...
W
Not sure this helps...
When I changed belts, marks for TDC were very evident underneath the belt covers.
With one plug out of each cylinder, and an engine turning tool (or rear wheel off ground/first gear)
Place finger in cylinder plug hole and feel for the compression stroke.
Once you come onto that stroke, you can visually check for TDC with the cam wheels having a mark on them that points to the mark under the covers. I believe the cam wheels had a paint mark and the backside of the cover was a dimple.
Hope this helps.
Do you mean the alignment marks for installing the belts?
Yes. Each cam wheel or cog or whatever has marks (paint) on a slash in the cam wheel.
and the back cover has marks. Vertical has a indentation dot on the left side of the cam wheel. The horizontal points to a screw hole. Hence why you had not seen the obvious mark.
If you have not removed anything, it will be evident based on where the cam wheel timing mark is pointing to after you have done the finger in the plug hole R-TDC (rough top dead center).
You can then add a dab of white out or note it down in a book. I tend to have a composition book to take notes on different processes so if it is a mark, a wire, a strip down procedure especially... I can look back on it. Since belts are done not so often, it helps to make notes if you are unsure.
I believe you can also get timing info from the sight glass on the left side of the engine case. The generator cover has an arrow mark, and the fly wheel has dot indentation.
If you removed belts and are trying to find the timing, the sight glass and the main timing belt drive shaft (center cam wheel that drives both belts). Book states: Position the crankshaft in such a way that the horizontal cylinder piston is at TDC in the firing phase mark (A) **A is the dimple on the main drive cam** of the sprocket (8) on the timing belt driveshaft with reference notch (B) **B is the notch line on the clutch cover**.
Hope this helps.
I guess specifically what I'm asking is, when the motor is in TDC compression stroke on the vertical cylinder, where is the mark on the case? The mark on the horizontal cylinder is pretty obvious, but the mark on the vertical cylinder is not.
Also, I'm not sure I understand what you mean by on the back of the belt covers. How would this be helpful once they are off?
Mark on the cam pulley will be in the vicinity of 3 O'clock.
but there's no matching mark on the case I take it?
And just to clarify, you are saying the the cam pulley on th evertical cylinder should be at approximately 3 o'clock when the vertical cylinder is at TDCC?
Quote from: Smokescreen on November 17, 2008, 03:19:28 PM
but there's no matching mark on the case I take it?
And just to clarify, you are saying the the cam pulley on th evertical cylinder should be at approximately 3 o'clock when the vertical cylinder is at TDCC?
Ack, no.
The drive pulley on the crankcase will be at roughly 3 O'clock.
The pulley on the cam will be at roughly 7 O'clock.
To verify, you can also look through the timing window on the alternator cover and you should see a dot on the flywheel when the vertical cylinder is at TDC. Also, Speeddog is correct that the cam drive pulley (the one just above the oil filler cap) will be approximately at 3 o'clock, OR if you look at from about 2 feet away the mark will be in alignment with the horizontal cylinder.
I want to post a picture here, but I can't figure out how, am I able to post a pic staight from my compy?
W
Quote from: Smokescreen on November 21, 2008, 10:13:05 PM
I want to post a picture here, but I can't figure out how, am I able to post a pic staight from my compy?
W
You need to host the pic someplace like Flickr or ....
More info here:
http://ducatimonsterforum.org/index.php?topic=109.0 (http://ducatimonsterforum.org/index.php?topic=109.0)
--------------------edit-----------------
Here's your pic:
(http://farm4.static.flickr.com/3032/3049888000_3423dffd3f_o.jpg)
Try this:
Pull the other belt cover.
Rotate the engine until the dot on the drive pulley on the cases aligns with the hashmark.
See if the dot on the vertical pulley aligns with the hashmark on the inside belt cover (aluminum part bolted to the head).
I'm not positive I understand what you mean, but I'll say, I know it was silly not to remove the other cover, but the horizontal cyl is centered, and the TDCC location was verified through the alternator side looking glass, and with a flashlight to verify piston location.
If I spin the whole mill, the picton will leave tdcc, so when the mark is lined up where I think is correct, the dot in the site glass is long gone.
Alright, so hopefully this wednesday in the evening, I'll be able to sit down and spend some time with the bike. I'm going to, unless anybody has objections, (in which case, speak up!!) to loosen the belt tensioner and rotate the cam pulley one tooth anti-clockwise. Then Friday I'm going to remove the clutch and clutch side case cover seal, replace the clutch and replace the clutch plates, throwout bearings, springs, bolts, and belts on Julia's M900. Then, if I don't ruin anything new, we'll be out for a ride Sunday!!
Probably my last joyride whilst I still live in SoCal, as over Christmas I'll be headed to Colorado, and prolly for good :(
So, now with it all over, here's the story...
Sure enough, the vertical cylinder cam was offcenter one tooth clockwise. From there, things get a little facked up.
I sent the bike to a service center whose previous front man I'd had some real troubles with. The guy was an arse, and I hoped that with him gone things would improve. Sadly this story is about how they didn't... I dropped the bike off and was quoted $100 for a shakedown and check of the injection system; if something needed doing, I was to be called and the thing could be discussed with me.
I was called on a Saturday, (they are closed Sundays and Monday, so I'd have all weekend to stress about this) and told that the bike's cam was offcenter, the valve guides were all out of spec, and the valve clearances were all out of spec... I asked why they didn't center the cam as soon as they found the fault, for as you no doubt know, once the covers are off, and the valve at TDCC, fixing the issue takes an extra five minutes. No reasonable answer could be given, and I wasn't called to ask if it should be done. the bike was already back together and I was to pick it up asap...
I picked the bike up the following tuesday, and looked it over. The vertical cylinder desmodrome covers were never removed, so those clearances weren't checked. On the horizontal cylinder, one opener was out of spec loose by .005mm (.020 instead of .015), all others were fine. The valve guides, if worn out, don't show it with ANY noticable play. So this last saturday, Julia and I recentered the cam in about 30 minutes from first bolt to last, and then I supervised while she replaced her clutch pack in less than an hour. Then as a rundown for both bikes, we rode to Santa Paula, stayed the night, then rode up the 33 out Cerro Noreste, back down Lockwood Valley, down the 33 to the 150 to Bocolli's (sp?) for pizza then stayed the night in SP again and rode home this morning. The bike ran PERFECTLY the whole time, and Julia's clutch is better than when she got the bike. The Barnett Red Pack with Speedymoto Springs available from cacycleworks is pretty awesome! This next weekend we'll replace her belts, and I'll not screw up this time....
The moral of the story is here in LA, if you are going anywhere other than to Valley Ducati Service or to Leif, you are probably being lied to. Certainly the Glendealership I went to wasn't remotely honest to me. When i picke up the bike, they claimed that they didn't bother fixing it because it automatically would have put the bill over $300... What, for that extra 10 minutes it would've taken to at least center the cam??? While not doing that, they did do a compression test without first centering the cam, and would you believe, they reported that I have compression loss?!!??!?!? Really? When the cam isn't centered the motor doesn't achieve full compression?! A-Farkin-Mazing... A Moneky coulda told me that and they coulda spent those ten facking minutes recentering the cam.
Rant over, and BTW, Blue is running better than when I got her!