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-   -   Identify this old Exhaust system??????? (http://www.advrider.com/forums/showthread.php?t=831886)

Pigford 10-05-2012 11:29 AM

Identify this old Exhaust system???????
 
So, any idea's what pipe this is ????? It's off a Kawasaki Z1 / KZ900


http://i54.photobucket.com/albums/g9.../Photo1837.jpg

http://i54.photobucket.com/albums/g9.../Photo1838.jpg


No markings that I can see :huh

Rob Farmer 10-05-2012 01:29 PM

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!!"

BOOTLACE 10-05-2012 03:55 PM

Thats funny! :rofl

Airhead Wrangler 10-05-2012 04:25 PM

Quote:

Originally Posted by Rob Farmer (Post 19755499)
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.

:rofl

bmwrench 10-05-2012 07:53 PM

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.

Pigford 10-06-2012 02:09 AM

:cry OK - Cheers for making my weekend Rob :huh

Rob Farmer 10-06-2012 03:08 AM

Quote:

Originally Posted by Pigford (Post 19759493)
:cry OK - Cheers for making my weekend Rob :huh

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

mudgepondexpress 10-06-2012 11:15 AM

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

XS500RUS 10-06-2012 01:45 PM

Quote:

Originally Posted by mudgepondexpress (Post 19761338)
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

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

Pigford 10-07-2012 03:16 AM

Quote:

Originally Posted by mudgepondexpress (Post 19761338)
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


Thin is a rather good description :eek1

Many thanx chaps !!!!!


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


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