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998s Refurb

Discussion in 'Builds & Projects' started by West Cork Paul, May 24, 2020.

  1. Check the throttle bodies haven't jumped out.
     
  2. Do you mean the valves themselves FE? ie the flat disk bit that turns when you twist the throttle?
     
  3. The throttle bodies haven't popped out of the inlet rubbers
     
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  4. Ah, OK, thanks, I'll check that whilst I'm in there :upyeah:
     
  5. It was/is a wet day here so I've been in the shed fiddling around with the bike to a) see if I can find out what's causing the misfire and b) to fit a couple of parts I bought - might as well do them at the same time whilst it's in pieces.

    I managed to find a set of 50mm CF Termis which arrived last week, readers will recall the bike has 45mm titanium Termis which had been pushed inside the 50mm exhaust pipes - by the supplying Ducati dealer I may add:astonished:. I couldn't find a titanium 50mm set so settled for the carbon fibre ones. They just need a bit of a polish that's all.

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    I also bought a monoposto subframe so the plan was to fit that as well.

    IMG_3147.jpg

    However, the bike has an alarm and the fitter ran part of the alarm loom through the subframe and not behind it :(. It's the piece wrapped in black insulating tape. I can see why he did that as there's part of the bike's loom run through there as well plus there's a rubber band to hold it in place. The problem is Ducati thought about it and put a connector there which allows the loom to be broken and passed through the subframe; the alarm fitter didn't think about it :mad:. The only way to get that out of there so the subframe can be removed is to cut it:( and guess what? all the wires inside the tape are black. No monoposto subframe today then.

    IMG_3149.jpg
    IMG_3154.jpg

    Time to reassemble everything and move onto the original job which was to replace the fuel filter. Tank off, fuel drained, pump assembly out and check it over. With the exception the filter is dated 17.02.04 all is good in there, all the pipes are in good nick:upyeah:. Old filter out, fuel pump out as well and check the gauze filter underneath, not too bad (apologies for the blurry picture of that one) just a tiny bit of what looked like fluff, otherwise good. Clean the pump pick up filter, replace the fuel filter with a new one dated 10.01.20 and reassemble the assembly.

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    Now for reassembly back in the tank tomorrow morning. A question though. Should the large green O-ring sit on the bottom of the fuel pump flange where the no.15 is in the colour photo below, or should it sit on the shoulder above that, where the no.23 is in the photo? I can't remember what I did when I replaced the fuel filter on the 748 last year but what I do know is that when I first reassembled the 748 tank and filled it with fuel it pissed out all over the engine:( as I'd nicked the o-ring putting it back together:astonished:. Just in case I ordered two this time round :).


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  6. One further question. Removing the injector assembly of the throttle bodies. Having disconnected the wiring to the injectors and the union for the fuel feed pipe in the airbox, the workshop manual simply says "turn intake funnels strongly clockwise to remove from the throttle body clips" - the problem is mine only turn anti-clockwise but even then won't lift out. I don't want to force them and then break something but is the "clockwise" in the service manual a misprint? (I've found others in the past in other Ducati service manuals) and also, how far should they turn? I'm assuming about 45 degrees is all that's needed to clear the spring clips that hold them in place :thinkingface:.

    IMG_3164.jpg
     
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  7. I can't remember which way Paul but I do remember thinking this thing has to break when I stripped my 998s there tight
     
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  8. You can see the clips on the underside of the airbox if you shine a light via the LH side. Hope you understand. Clockwise to remove is oké as far as I can remember.
     
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  9. Gteen o ring on the shoulder as I remember :upyeah:
     
  10. Anti clockwise to remove. Make sure you put a smear of red rubber grease over both the O rings inside the throttle bodies when refitting. Don’t split them as they are a tenner a piece.
    And the O ring in the recess on the fuel pump base A bit of red rubber grease over the O ring and job’s a good un.
     
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  11. I’m still confused as to where the big green o- ring sits, on the base of the flange marked ‘Or Here’ in the last pic of post #125 above or or the in ridge above that marked ‘Here’.

    The reason I’m unsure is it’s a loose fit when I’m the ridge marked ‘here’ but has to be stretched slightly to fit the base marked ‘or here’ but an attempt to fit it earlier proved difficult when in that position and I don’t want to break it or not have a seal. TIA
     
  12. Where the number 23 is showing the O ring in the coloured diagram.
     
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  13. Here's our image if that is what you mean:

    s-l500.jpg
     
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  14. Thank you, clear now :upyeah:
     
  15. It is a bastard to get back in. I used some bolts to pull the whole assembly slowly back in rather than trying to push it as it's so difficult to keep square and it tries to squish out. I now use 90 shore hardness viton O-rings instead of the 75 hardness rings that are standard. Helps a little.
     
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  16. Grease it up and wind it in - feck knows what to do with your o-ring though o_O
     
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  17. Just so you know Paul, mine popped out easily and went back in with little effort and no leaks to boot. Just thought I would let you know before the 17 page fuel tank o ring thread kicks off :p:D
     
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  18. It always pays to have a few spare, never had the need to use more than one though. O rings 008.JPG
     
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  19. Useful photo Steve, thanks :upyeah: I bet they're cheaper than getting them from the Ducati dealer.
     
  20. I think that lot with a tube of o-ring specific grease came to £14 delivered, a few years back.
    Steve
     
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