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Thread: Top End Refresh

  1. #1
    Join Date
    Sep 2009
    Location
    Chicago, IL. USA / Elora, ON. Canada
    Posts
    31

    Default Top End Refresh

    I pulled my heads+cylinders off to check and freshen up with new gaskets, seals and rings. This is the first Ducati engine iíve ever taken apart and would appreciate any suggestions:

    -a few of my rockers are showing wear so iím gonna redo them all. Recommendations for refurbishing/exchanging or buying new? Preferably in the US? (reasonable $$$ too.....Electraeon rockers seem awesome, but way too expensive. Lol)
    -I read that MBP collets are a Ďmustí upgrade and worth the $$$. Where to buy?
    -gasket kits......aftermarket sets ok?
    -ring set for stock 94mm pistons?

    The cams and their bearings look good so I was going to clean the carbon, check for cracks and lap the valves. The wrist pins and bottom end feel good so I donít plan on going any deeper. Anything else recommended for these engines?

  2. #2
    Join Date
    Oct 2011
    Location
    Vancouver B.C.
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    167

    Default

    Check your valve to guide play.

  3. #3
    Join Date
    Dec 2007
    Location
    Berkeley, California
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    338

    Default

    I recommend using Megacycle Cams http://www.megacyclecams.com to refurbish your rockers.

  4. #4
    Join Date
    Aug 2007
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    Cornwall S.W. England
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    Default

    Mike at MBP has a thread on this forum.
    I find him very good/fast to deal with and as has been posted highly recommend his collets.
    I fit them to all of my motors.

    Steve R

  5. #5
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    Sep 2009
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    Default

    Thanks for the suggestions so far!
    -I read in another post about Cometic gasket kits being a good and economical substitute for OEM but I can’t find anyone selling them for my bike. Any ideas?
    -anyone used non-OEM (Wiseco, JE, etc) rings on stock 94mm pistons?

    BTW, sagot, Valve guides are all good. Thx.
    Last edited by BTD; 11-27-2017 at 10:38 PM.

  6. #6
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    Aug 2007
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    Default

    I bought Cometic gaskets direct from Cometic in the USA.
    I spoke with them over the phone, they were good/easy to deal with.

    Steve R

  7. #7
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    Sep 2009
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    Chicago, IL. USA / Elora, ON. Canada
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    Default

    Quote Originally Posted by Mr.R View Post
    I bought Cometic gaskets direct from Cometic in the USA.
    I spoke with them over the phone, they were good/easy to deal with.

    Steve R
    Yeah, I looked there but there was no listing on their US website. Iíll try calling. Thanks.

  8. #8
    Join Date
    Aug 2007
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    Cornwall S.W. England
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    Default

    Most of the 851/888 gaskets are exactly the same as the later 916 items, that Cometic have listed.
    You'll probably need to know the size of the gaskets that you require.

    Steve R
    Last edited by Mr.R; 11-28-2017 at 11:51 AM. Reason: added info'

  9. #9
    Join Date
    Sep 2009
    Location
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    Default

    Quote Originally Posted by Mr.R View Post
    Most of the 851/888 gaskets are exactly the same as the later 916 items, that Cometic have listed.
    You'll probably need to know the size of the gaskets that you require.

    Steve R
    I called Cometic and they said the only gasket they had that would work was a 96mm bore head gasket (PN= C8564) My bores are 94mm so I called Athena Gaskets US and they have a 94mm top end kit made to Ducati OEM specs (head gasket is 1mm thick)

  10. #10
    Join Date
    Sep 2009
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    Default

    I sent my rockers to Mike at EMS and he is very professional and honest; I highly recommend him. Thanks for the tip Steve R.
    He also sent me the MBP retainers but then we realized that the retainer grooves in my valves weren’t deep enough for the MBP’s. My valves are 33/29mm with 7mm stems and ~5.60mm diameter grooves. Apparently MBP’s only work on later (1992+) valves with ~5.15mm grooves. I’d really like to switch to the MBP’s so does anyone know if I can send my valves out to be safely machined or ground down to the ~5.15mm grooves? Or do I need to buy later style valves?
    Last edited by BTD; 12-15-2017 at 10:52 AM.

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