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2 b sure, 900 head assembly

Started by greenmonster, December 27, 2021, 06:01:06 AM

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greenmonster

December 27, 2021, 06:01:06 AM Last Edit: December 27, 2021, 06:02:46 AM by greenmonster
Been a while since l did this last time, 10 years or so, so memory a little rusty...

1. Is this correct
https://www.bike-parts-ducati.com/ducati-motorcycle/Monster/1998/Monster_900/Monster-900/CAMSHAFT/676/2311/0/676. ?
My Haynes shows #19 w sealed side outwards, not towards cam lobes.

2. All parts in correct order, is it just to tighten #1 (new of course) and all will be proper w correct tension?
Have a vague memory of that #8 must be in precise right position to not bind #9 (or the speedo gear) and to not stress bearings
#8 & #13.

3. Anything else to look out for?



M900 -97 
MTS 1100s  -07

MonsterHPD

#1
December 28, 2021, 01:45:58 AM
Morning,

this is what it looks like on my old, on-the-shelf and sa far as I know never-changed ST2 heads:

2021-12-28 10.30.29 by torbjörn bergström, on Flickr

I don't remember what I did on the m800, but it's still running. I suppose it has to do with what the oiling bore is for ...
Monster 900-2002 (sold, alive and well in the UK), 749R / 1100 HYM combo for track days, wifes / my Monster Dark 800-2003 (not entirely "Dark" anymore and a personal favourite) , 50% of 900SSie -2000 track bike for rainy days-now with tuned ST2 motor and Microtec ECU. Also parked due to having been T-boned on track.

greenmonster

#2
December 31, 2021, 05:55:24 AM
Hmmm, seems many have holiday absence...

2 bids so far, thx Thorbjörn, and my parts dealer (Biscaya) says open end towards lobes.
So altogether, 4 bids, 2 vs 2. [roll]
M900 -97 
MTS 1100s  -07

koko64

#3
December 31, 2021, 12:56:55 PM
The seal on the cap of my old 94 M900 is inwards but the outer seal on the belt side is outwards. I expected the seals to all be outwards.
2015 Scrambler 800

koko64

#4
December 31, 2021, 01:24:39 PM
The old oem manual gave no instruction. :P
2015 Scrambler 800

koko64

#5
December 31, 2021, 01:39:21 PM Last Edit: January 02, 2022, 07:44:40 AM by koko64
Edit. I posted some incorrect info re the oil circulation and have deleted it.
Don't know what I was thinking. Please ignore it.
2015 Scrambler 800

ducpainter

#6
December 31, 2021, 01:42:41 PM


The lip of the seal, the part with the spring, should face the source of the oil.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


koko64

#7
December 31, 2021, 01:56:25 PM
An elegant explanation [wine].
2015 Scrambler 800

koko64

#8
December 31, 2021, 02:05:06 PM
The oil feed is definitely into the cavity outboard of the bearing so the seal lip faces it as you say.
2015 Scrambler 800

greenmonster

#9
December 31, 2021, 03:31:46 PM
Quote.The lip of the seal, the part with the spring, should face the source of the oil.
Quote.The oil feed is definitely into the cavity outboard of the bearing so the seal lip faces it as you say.

Seems logical, maybe we have a winner, open end towards cavity, not lobes. :)
M900 -97 
MTS 1100s  -07

ducpainter

#10
December 31, 2021, 03:40:22 PM
SOP. Been done that way forever. ;)
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


greenmonster

#11
January 01, 2022, 07:00:38 AM
Sooo, how about no 2, just screw it together and all will be dandy?
M900 -97 
MTS 1100s  -07

ducpainter

#12
January 01, 2022, 01:45:30 PM
Quote from: greenmonster on January 01, 2022, 07:00:38 AM
Sooo, how about no 2, just screw it together and all will be dandy?
I don't know about that part. Tony has a factory workshop manual.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


koko64

#13
January 01, 2022, 07:22:23 PM
I'll check it.
2015 Scrambler 800

koko64

#14
January 01, 2022, 07:39:45 PM Last Edit: January 01, 2022, 07:41:29 PM by koko64
Get the torque right. [thumbsup]
Factory manual says :
69-74 Nm cam pulley nuts
59-64 Nm on driveshaft

Values are rounded.

Haynes says 70-75 & 60-65.
2015 Scrambler 800
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