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ducatipaso.org • View topic - damaged rockers
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 Post subject: damaged rockers
PostPosted: Mon Feb 27, 2012 5:58 am 
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Joined: Sat Jan 15, 2011 9:09 am
Posts: 34
Location: wanganui NEW ZEALAND
model: 907 I.E.
year: 1992
Has anyone had problems with rockers getting damaged,have been told this
is a lubrication failure but im not so sure,i had same problem with vf1000r
rockers but no lube problem after i had them tungsten coated.Would
appreciate any feed back on how long or often rockers have lasted or
issues with failing cam/rocker parts!!!!!!!!!!! :thumbup:

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 Post subject: Re: damaged rockers
PostPosted: Mon Feb 27, 2012 10:08 am 
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paso grand pooh-bah
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Joined: Thu Nov 03, 2011 10:13 am
Posts: 769
Location: Scotland
model: 907 I.E.
year: 1994
Rocker failure on 2 valve Ducatis is very unusual. Can't say the same for the 4 valve Desmoquattros though. Doing a service on an ST4s with 20,000 miles on it yesterday and found 2 openers with flaking chrome.

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 Post subject: Re: damaged rockers
PostPosted: Mon Feb 27, 2012 11:09 pm 
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paso grand pooh-bah
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Joined: Sun Jan 07, 2007 12:00 am
Posts: 531
Location: holland
model: 907 I.E.
year: 1991
never had any trouble with the rockers for the last 32 years on 2-valve Duc's. the only thing popping in to my mind is as service is neglected the rockers can come under stress of too much play or lack of play.
Valveguides. specially the exhaust side are more common.
4 Valve's from '96 or '97 to 2003 or 2004 faced problems as the hard chroming process had flaws.

Bertus


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 Post subject: Re: damaged rockers
PostPosted: Tue Feb 28, 2012 7:29 am 
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Joined: Sat Jan 15, 2011 9:09 am
Posts: 34
Location: wanganui NEW ZEALAND
model: 907 I.E.
year: 1992
CHEERS for the reply!Bikes done 85000 k's and is in really good condition but is
in need of attention which it's getting now(had it one year this month),love
working on it as much as riding it.Found st2 cams for $550 nz(400 euro)in mint
condition so they can go in the mix with mbp collets,new guides,valves(didn't
need doing but had them anyway).
Hope all you northeners looking forward to summer,ours has been crapp :cry: !!


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 Post subject: Re: damaged rockers
PostPosted: Tue Feb 28, 2012 6:15 pm 
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paso grand pooh-bah
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Joined: Sun Jan 07, 2007 12:00 am
Posts: 531
Location: holland
model: 907 I.E.
year: 1991
Hi ocean,
charged my battery. this week I'll awaken her for a ride.
last year we had a very nice spring, crap summer and a beautifull autum.
So, I'm eager to catch the first sun.

good luck with you're upgrading of the valve train.

Bertus


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 Post subject: Re: damaged rockers
PostPosted: Sat Mar 03, 2012 3:38 pm 
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paso grand pooh-bah
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Joined: Mon Jul 26, 2004 12:00 am
Posts: 3081
Location: Finland
As guys stated, such problems are mostly in 4 valvers between some years, not in 2 valvers. I had to change already few to my 2002 ST4S engine but i havent seen ever such in my 2-valvers. Still: It is connected surely to few modell years for those 4-valvers, not all of them. You can read plenty of this from another forums.... :)

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 Post subject: Re: damaged rockers
PostPosted: Fri Apr 13, 2012 2:43 am 
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Joined: Tue Sep 15, 2009 4:08 am
Posts: 222
Location: Melbourne Vic, Australia
model: 907 I.E.
year: 1991
on my restoration bike the rockers had worn a 'flat' & needed to be resurfaced , including new hard chroming [I think]. It had around 95,000km on the odo.
Bob Brown of Melbourne Desmo, reckons it quite common, but then he has seen a lot of bikes...! The valve guides were stuffed and the rings were totally wrong, like a 3-4mm, yes mm gap. All fixed now.

On my other bike; the heads are off as it was pissing oil out from the barrels, mostly Vert. The rockers are ok, this motor has about 50,000km. The rings had lost their spring , so we have sourced new pistons & barrels very cheaply [NOS] around $250 for a pair! Heads are getting skimmed to check for flatness. He noted some wear on 6th gear. Hopefulluy a reasonably oil leak free motor...PLEASE!!

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 Post subject: Re: damaged rockers
PostPosted: Sun Apr 15, 2012 11:37 pm 
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Joined: Wed Dec 05, 2007 12:35 am
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Location: Newzealand
model: 906 Paso
year: 1990

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