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Thread: Custom Exhaust Project

  1. #16
    apriliaforum prov-nov
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    I thing so.
    Had to measure it .... please wait.

    .
    .
    .
    .

    The pipe stubs have both (Peg 655 and F650 654) an outside diameter & length (!) of 34,9 mm.

    Good night.

    Holgi

    Take a look to this guy ... http://www.apriliaforum.de/pegaso/39...thread-10.html
    Last edited by Holgi; 01-09-2013 at 05:07 PM.

  2. #17
    apriliaforum prov-nov
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    Just a thought, has anyone modified a standard set of silencers? I just happen to have a spare set and I'm tempted to pull them apart and chop out the cat and replace it with a perforated tube and silencer matting. Any thoughts on this?

  3. #18
    apriliaforum Member
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    Canis,
    I did the very same thing on a Ducati that I had. I cut the silencers open, salvaging the inlet, outlet and outer aluminum sleeve. Fortunately, the original Ducati mufflers had a decorative aluminum sleeve over top of the actual steel muffle underneith. I fashioned a set of perforated baffles (I bought some from Hindle) and some fiberglass packing. I then attached the original Inlet and Outlet caps to the outer sleeve using rivets, enabling repackign in the future.

    Unfortunately, the Pegaso mufflers are steel and prone to rust so your efforts might still disintegrate in short order. It could be worth a try if your muffler casings are in good condition to start with.
    Andy
    2000 Pegaso

  4. #19
    apriliaforum prov-nov
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    Hi, yes rust will always be a problem, the cases are in good condition at the moment, I think I will wait to see how your project turns out, I do love the look of the standard silencers black against stainless, but im looking forward to your finished exhaust.

  5. #20
    apriliaforum Member
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    I had my silencers sand blasted ; coated and oven cured by a race shop that does lots of auto headers.

    $160 and a year later so far so good - no rust yet.

    This was not a rattle can job.

    Rust never sleeps.

  6. #21
    apriliaforum prov-nov
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    yeah thought of getting mine blasted and powder coated after modifying them.

  7. #22
    apriliaforum prov-nov
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    Any further progress on this Andy?

  8. #23
    apriliaforum Member
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    I have been recovering from the influenza that has been rampant in these parts as of late. I hope to make my way into the garage this weekend and to post some progress soon showing the first tube cutting. Sorry for the lapse but I am glad you guys will keep my feet to the fire. Cheers.
    Andy
    2000 Pegaso

  9. #24
    apriliaforum Junkie
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    Just posting some pics, perhaps helpful ....




  10. #25
    apriliaforum Member
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    stisma, Those silencers look great. Are they specifically for the Pegaso?

    To all, I have been a bit too lazy & cold as of late to get myself into the garage and hence no progress. With only 1.5 months until April & riding season, I will start making a renewed effort to get this done. Plus, I need to leave myself some time for rejetting trial and error. In the last picture I posted, you can see a new obstacle. The forward luggage rack bracket does allow enough clearance for the silencer inlet pipe. I have two options: 1. move the silencers slightly more inboard and try to start the bend as close to the silencer as possible. 2. Make a new luggage rack bracket that is semi-circular ( like a "C") to replace the squared off original bracket, allowing maximum distance from the silencer in line with the piping. I am leaning toward option 2 as I would like to leave the silencers sufficiently outboard to be centered in the cavity of the old silencers. Also, My brother's luggage racks are missing those brackets so I was going to have to fabricate new ones anyways. In this case, he can have my originals.
    Andy
    2000 Pegaso

  11. #26
    apriliaforum Junkie
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    Hehehe the plan was to get you going on the exhaust project.

    Yes, the Giannelli's are the original silencers.
    I've purchased them used a while back with a knowledge of being damaged.
    Well .... the right one is in perfect condition, where the left one has
    severely twisted pipe. Also some damage to the silencer as well.
    As I no longer have access to the shop it's a waiting project.

  12. #27
    apriliaforum Junkie
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    on the exhaust project!!!



    The spring is around the corner ...... I think.

  13. #28
    apriliaforum Junkie
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    Managed to "put together" this exhaust from few bits and pieces....
    Used, in stainless steel, factory fit, total weight 11lbs.
    Waiting for the temp to rise....it was snowing last night!?!??!?


  14. #29
    apriliaforum Member
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    Stisma,
    That looks great! I have managed to make some progress and should be done by this time next week. Question for you. What are you thinking in terms of jetting? I'm was planning on 45 pilots and 117.5 or 120 mains. As for needle, that I have no idea yet but think a replacement might needed versus a simple clip move. What do you think?
    Andy
    2000 Pegaso

  15. #30
    apriliaforum Junkie
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    The set-up you mentioned certainly seems proper or at least appropriate as it
    has been mentioned in the past by few Peg riders. Most are long "gone".

    I don't think there is a ultimate set-up as these things have the mind of their own.
    Few F650's I know are running with Factory Pro jet kits, Akrapovic singles and are running very good.
    Apparently they have replaced needle jets (emulsion tubes) as well. It seems the emulsion tubes
    solved the low RPM issues, stalling and .... guys are defending the emulsion tubes upgrade religiously.
    With all that said... F650's do not leave our bikes in the dust, nor can we outrun them.
    I have no knowledge of the set-up on my brothers bike as he bought it second hand.
    Carbs were dirty, gummed-up and abused, I just cleaned 'em.
    On my bike only the pilots were replaced from 40 to 45 and the needle clip is on 3rd.
    Or so I was told by the dealer while the bike was under warranty.
    (I'm not a carb-person, gimme a diesel any time)
    Both bikes are still with factory exhausts ..... I've been lazy.

    In case you need the info ...... Factory Pro Jet Kit CRB-AP65-1.1-ti for about $100
    and the tubes CRZ-EMU-100102k for about $60.
    (I've had it all, ready for installation, but a year of the hospital stay can cause things to.....disappear)

    And again, you certainly fit the bill to make such improvements.
    I can't wait to see the custom exhaust.

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