1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Amal carb sleeve

Discussion in 'Other Norton Motorcycles' started by Paul W., May 19, 2018.

  1. Paul W.

    Paul W.

    Joined:
    May 12, 2018
    Has anyone here had a monobloc sleeved? I had the Amal concentrics sleeved on my old ‘69 Triumph and it made a huge difference. The slides on my Norton keep sticking, even after sanding them. So I decided sleeving them is the best way to go, other than new replacements.

    Thought?
     
    Tags:
  2. Beach

    Beach VIP MEMBER

    Joined:
    Aug 27, 2013
    I've had 3 sets (monoblocs) resleeved by Lund machine. Work perfectly after being done. Of course I reccomend or wouldn't have had any done after first set.
     
  3. Paul W.

    Paul W.

    Joined:
    May 12, 2018
    Thanks for the reply. I've read some negatives about sleeving monoblocs, so this is good to hear. Lund is who I am going to have do them.
     
  4. pbu 232

    pbu 232

    Joined:
    Sep 3, 2013
    Do Lunds sleeve the body, or the slide? Most seem to sleeve the slide with stainless and bore the body out? pbu232
     
  5. Beach

    Beach VIP MEMBER

    Joined:
    Aug 27, 2013
    They sleeve the slide and then match body to slide.
     
    Paul W. likes this.
  6. Paul W.

    Paul W.

    Joined:
    May 12, 2018
    He machines down the slide, then sleeve it. He then trues up the bore in the body and matches it to the slide.

    With my carbs, I ordered new jets, needles and floats from Amal. They’re better than new now. I still need to spend a day fine tuning them, but they are working very well right now.
     
  7. Burgs

    Burgs VIP MEMBER

    Joined:
    Dec 14, 2013
    One would think it would be better the other way round, bore the carburetor body and sleeve it, rather then the slide.
    That way when the slide wears it is a simple slide replacement, instead of re-sleeve the slide and bore the carby body again?

    Is there a good reason for doing it the other way round?

    I am currently looking at doing the Monoblocs on my 650SS build, after pricing new ones I am having another look at re-sleeving the originals, another problem I have is the slides up to and including the caps are missing, but I have the cables, junction and the throttle!

    Another project I have is a 69 Daytona and the Concentrics on it have been re-sleeved but not real good so I am a bit up in the air at the moment with Monoblocs.

    Regards
    Burgs
     
  8. Beach

    Beach VIP MEMBER

    Joined:
    Aug 27, 2013
    In my experience after mod , there isn't any noticeable wear on slide or body after lots of miles. For some reason having 2 different types of metal doesn't wear as quickly as similar metals do.

    Maybe the body isn't thick enough to sleeve or would make process more involved.
     
  9. Paul W.

    Paul W.

    Joined:
    May 12, 2018
    I chatted with him for awhile when I picked them up. He is only 20 minutes away from me. He said that even the new Amal carbs being sold need sleeve work after a few thousand miles because they haven’t changed anything. He wasn’t awars of how the newer anodized slides perform. I noticed that with the Norton and my old Triumph, they actually idled afterwards.
     
  10. Burgs

    Burgs VIP MEMBER

    Joined:
    Dec 14, 2013
    There is a chap about 10 minutes from here that does re-sleeving, I might give him a call and see what he reckons, I know he does concentrics but not sure on the Monoblocs.
    I put Premier Concentrics on the Commando and they are excellent, there is no sign of wear yet after 2,500 odd miles.

    Similar metals quite often gall that is why they wear.
    "Galling is a form of wear caused by adhesion between sliding surfaces. When a material galls, some of it is pulled with the contacting surface, especially if there is a large amount of force compressing the surfaces together. Galling is caused by a combination of friction and adhesion between the surfaces, followed by slipping and tearing of crystal structure beneath the surface. This will generally leave some material stuck or even friction welded to the adjacent surface, whereas the galled material may appear gouged with balled-up or torn lumps of material stuck to its surface"
     

Share This Page

Loading...