Ducati.ms - The Ultimate Ducati Forum banner
  • Hey Everyone! Enter your bike HERE to be a part of this months Bike of the Month Challenge!
1 - 20 of 21 Posts

·
Registered
Joined
·
791 Posts
748's are probably more susceptible to flaking rockers due to the revvier nature of the motor. Meaning higher RPM. But yes, they all flake. Don't believe what they tell you!!!
 

·
Premium Member
Joined
·
8,766 Posts
The flakes are found in the 748, 916 from 96 to 98, 996 from 99 to 01. The 95 916 rarely flaked if at all, I haven't personally heard of a case and the Testrasetta motors were unaffected. Meaning the 998 and above.
 

·
Registered
Joined
·
4,086 Posts
i changed my oil today, part of the flywheel removal process, looked at the filter screen..(hold your breath) there were beutiful silver/chrome flakes. i thinks it a boy.

in a couple months i'll post pics of my shredded rockers. in the mean time i'll buy up 16 of em. btw its a 9 year old 748
 

·
Registered
Joined
·
791 Posts
Namor said:
i changed my oil today, part of the flywheel removal process, looked at the filter screen..(hold your breath) there were beutiful silver/chrome flakes. i thinks it a boy.

in a couple months i'll post pics of my shredded rockers. in the mean time i'll buy up 16 of em. btw its a 9 year old 748
make sure they're megacycles!! buy me a few while you're at it. i expect flakes at every service interval. i'll take 2-3 of yours if you don't mind in the meantime. =P
 

·
Bobaganoosh
Joined
·
2,048 Posts
"make sure they're megacycles!!"

MBP also has a good process for recoating the rockers. Ive heard better than Megacycle. I will be using MBP's in my heads.
 

·
Premium Member
Joined
·
8,766 Posts
blade625CT said:
even two valve rockers flake. :)

They do but on a much less frequent scale.
 

·
Premium Member
Joined
·
8,766 Posts
Namor said:
i changed my oil today, part of the flywheel removal process, looked at the filter screen..(hold your breath) there were beutiful silver/chrome flakes. i thinks it a boy.

in a couple months i'll post pics of my shredded rockers. in the mean time i'll buy up 16 of em. btw its a 9 year old 748
All 16? Unless they are all bad I wouldn't waste my money. Usually the openers need changing the others can wait.

Megacycle vs MBP? Depends on who you talk to. You might want to PM Buckelew on this issue, he is well versed in every angle of flaking rockers.
 

·
Premium Member
Joined
·
8,766 Posts
color-rado said:
what scares me about this is you could go 15k miles and never see a flake then BAM..... need work...
You would think by 15K you would have escaped the dreaded flakers curse. Doing all those miles filled with flaking rocker anxiety syndrome and just when you thought it was safe to go on another ride, then BAM...need mental and financial help... Actually the condition should be recognized as a legitimate psychological ailment. I wonder if Psychology Today would be interested?
 

·
Registered
Joined
·
14 Posts
we could prolly get govt subsidization for a survey and study on the subject. we could even maybe recoupe the coss of the maint on the bikes....

one question though, if you tear the top end of the bike apart (for winter) is there a way that you can Upgrade?!? your rockers to not have the problem?.

thanks
 

·
Registered
Joined
·
1,615 Posts
What I do with my 916 and ST4 is check all the rockers at each 6,000 mile service interval. It is not that difficult to remove the opening rockers so you can get a good look at all the rockers. I only replace the ones that have actually flaked. It is usually the opening rockers, I have never replaced any of the closing rockers on my bike. So it may be one or two at a time. Many of them have dark wear marks on them, and those are most likely on their way out, but I dont replace them until the chrome actually starts coming off the face of them. Its an inconvenience, but what are you gonna do. I just accept it as part of the valve adjustment procedure.

To answer the previous question, the Megacycle rockers are much better quality and usually last the life time of the bike. Guy Martin in Canada also exchanges them and I have heard they are of good quality too.

Mike
 

·
Registered
Joined
·
4,086 Posts
John said:
All 16? Unless they are all bad I wouldn't waste my money. Usually the openers need changing the others can wait.
i know but somethin is telling me i'll need many of them, 16 was dramatical work, i'm guessing on 8.
 

·
Senior Moment
Joined
·
1,474 Posts
Synergy said:
"make sure they're megacycles!!"

MBP also has a good process for recoating the rockers. Ive heard better than Megacycle. I will be using MBP's in my heads.
while I have a lot of respect for Guy Martin (MBP), I haven't seen impartial data to say that his plating is better than the flakey BCM replates I've seen, the flakey Ducati ones I've seen....but I can say that my Megacycles had 8500 track miles and no sign of wear. I've seen megacycle rockers with over 20k miles and no visible wear.

There have been a couple of reports of testastretta motors with flaking rockers - but it's damn few.

ST4's have even been known to flake rockers - but far less because those bikes usually aren't thrashed.
 

·
Senior Moment
Joined
·
1,474 Posts
color-rado said:
what scares me about this is you could go 15k miles and never see a flake then BAM..... need work...
Perfect reason to insure that you, or whomever checks your valves, pulls the cams and visually checks the rockers. Just checking valve lash won't tell you anything until it's way too late.

Pulling cams to check rockers takes an additional 20 minutes to remove and install.
 

·
Registered
Joined
·
1,615 Posts
I think there is a progression to the flaking. It doesnt just happen immediately. First they discolor. Sometimes they can stay simply discolored but not actually flake for quite some time, in excess of 12,000 miles. I have talked with owners that have seen damaged cams from flaked rockers chewing them up. I personally have not seen that. I have changed out flaked rockers and the cams looked fine. My point is if you check the rockers and replace all the ones that have flaked, the wear incurred at another 6,000 miles should not damage anything else. I have talked with Jim Davis from Nichols extensively about this. They dont change out the discolored rockers, just the ones that have actually flaked.

I had a rocker flake on my 2V monster. I didnt know to check for it on the 2v bikes and it had flaked pretty bad. It had over 25,000 miles on it. The cam surface looked fine.

I also did a valve adjusment on a fellows 748 with 19,000 miles. I dont think the valves had ever been adjusted cause the timing belt was the original one. I replaced 3 opening rockers. One was the worst I had ever seen. The chrome was completely missing from a 1/4 in square patch. The cam looked ok. I could not see any appreciable wear.

Mike
 
1 - 20 of 21 Posts
Top