Identify this old Exhaust system???????

Discussion in 'Old's Cool' started by Pigford, Oct 5, 2012.

  1. Pigford

    Pigford British

    Joined:
    Sep 27, 2009
    Oddometer:
    995
    Location:
    North Dorset, UK
    So, any idea's what pipe this is ????? It's off a Kawasaki Z1 / KZ900


    [​IMG]

    [​IMG]


    No markings that I can see :huh
    #1
  2. Rob Farmer

    Rob Farmer Long timer

    Joined:
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    5,911
    Location:
    Loughborough, Leicestershire. England
    Thats a Jock Kerr. The worst exhaust and parts manufacturer ever, Made loads of noise and buggered your bikes performance. The only saving grace was the comedy factor of your mates swerving all over the road behind you when the baffle was fired down the road when the securing bolt inevitabley fell out. Throw it in the back of the garage as a 70/80s curiosity. I had them on a Guzzi V50 and a Morini 350 many years ago. They were pretty common on Kawasakis in the Midlands, I'll see if I've got any pics kicking about.

    They also offered a nylon "blank" piston kit to turn your 250 into a 125 :rofl

    Another example of their exemplary products (found on the web) I'm sure a google will turn up many more :-

    "Jock KERR ran a tuning outfit in Hertfordshire (near London, UK), in the
    70's/80's, they did a sleeved down conversion for the 400/4 that took it to
    250cc. The head was untouched, so the combustion chamber was mushroom
    shaped, VERY inefficient. It allowed learner riders to ride the 400/4,
    (limit was 250).
    I had one, flat on the tank, 11,000rpm, in 4th or 5th, (can't remember
    which!), I got nearly 70mph out of her!! :-)
    Oh to be 17 again!!"
    #2
  3. BOOTLACE

    BOOTLACE Bikie Scum.

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    Thats funny! :rofl
    #3
  4. Airhead Wrangler

    Airhead Wrangler Adios Mexico

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    Back in Seattle, FINALLY
    :rofl
    #4
  5. bmwrench

    bmwrench Long timer

    Joined:
    Nov 10, 2006
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    2,424
    I was on my way to a new girlfriend's place one night when the baffle blew out of a MAC 2:1 on my hot-rod R100. When I left her place very late that night/early morning, every light in the neighborhood came on. I heard later that many of them thought we were under attack.

    I'm still laughing about it almost 30 years later.
    #5
  6. Pigford

    Pigford British

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    :cry OK - Cheers for making my weekend Rob :huh
    #6
  7. Rob Farmer

    Rob Farmer Long timer

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    Don't tell me. You were going to sell it to fund the rebuild :rofl
    #7
  8. mudgepondexpress

    mudgepondexpress Long timer

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    If you were in the states I would say it is a MAC. Had the exact muffler/baffle on my CM400 exhaust. As said previously....hideously loud, kind of a sharp buzz sound at high rpms...only performance increase was a severe loss in weight (boy were they thin).

    Kenny
    #8
  9. XS500RUS

    XS500RUS Been here awhile

    Joined:
    Jan 23, 2008
    Oddometer:
    377
    Haha I have a MAC 2-1 on my XS500, not thrilled either. Compared to my old 2-1 (not sure of brand, Hooker? S&S?) the MAC had awful ground clearance, was heavier, and was more restrictive yet LOUDER. I pulled the baffle and fabricated a straight flow core wrapped in fiberglass packing, a huge improvement in sound (quieter and less blatty) and power. The only reason i dumped my old 2-1 was because it was rusting through in multiple places and I was sick of clamping on old beer cans :lol3
    #9
  10. Pigford

    Pigford British

    Joined:
    Sep 27, 2009
    Oddometer:
    995
    Location:
    North Dorset, UK

    Thin is a rather good description :eek1

    Many thanx chaps !!!!!


    And yes Rob, was going to put some funds towards more bike fettling !
    #10