Hints and Tips


----- Original Message -----
From: Greg Laves
To: barry@nwsca.com
Sent: Friday, April 27, 2001 12:23 AM
Subject: GPZ550 forks
Hello Barry,
I found out something that I had to double check because I didn't beleive my own measurements. I noticed in your spec sheet that you list '81 and '82 GPZ's as having the same size forks. I would have agreed with that until I measured them myself and the '81 GPZ550 forks are 1 mm larger than the '82 forks.
Greg Laves

----- Original Message -----
From: bartom
To: Greg Laves
Sent: Friday, April 27, 2001 6:38 AM
Subject: Re: GPZ550 forks
Thanks Greg
I will double check my source articles.
Is it possible yours were changed at some point to a later year?
regards
Barry

----- Original Message -----
From: Greg Laves
To: bartom
Sent: Friday, April 27, 2001 7:31 PM
Subject: Re: GPZ550 forks
Hello Barry,
I am positive that the forks were never changed. Fortunately for me the motorcycle was barely past break-in mileage when I got it. The brakes were locked up and it needed the carbs overhauled but it is all original. It looks like it just came out of the crate.

I worked at a Kawi dealer when both of those models were introduced and we were never aware that the size of the fork tubes were different. The only change I was aware of was the air system was different. The '81 forks had no balance tube like the '82. I would have bet that they were the same otherwise.
Greg

----- Original Message -----
From: bartom
To: Greg Laves
Sent: Friday, April 27, 2001 7:11 PM
Subject: Re: GPZ550 forks
Would they interchange anyway or is a 1 mm critical to a proper fit?
Barry

----- Original Message -----
From: bartom
To: Greg Laves
Sent: Friday, April 27, 2001 7:11 PM
Subject: Re: GPZ550 forks
Barry
I don't think that any of the parts on the forks will interchange between the '81 D-1 and the '82 H-1 GPZ. Obviosly, large fork tubes will not fit in small triple clamps and vice versa. And the same thing applies to attempting to swap upper and lower fork legs and seals. Also, the steering stem bearings are different. The '81 D-1 has the junk loose balls that have a very short lifespan and the '82 H-1 has tapered bearings. The front axle is the same diameter and length for both. and the entire front wheel assembly could probably be swapped between them. However, the brake rotors, although similiar, are not the same. Th '81 mounts with 7 bolts (7 spoke wheels) and the '82 mounts with 5 bolts. Brake calipers seem to be interchangeable. One other difference that I am not sure is "factory" is that the front and rear brake rotors on the '81 are thicker than the '82.
Greg

----- Original Message -----
From: bartom
To: Greg Laves
Sent: Friday, April 27, 2001 7:11 PM
Subject: Re: GPZ550 forks
Ok thanks
I will put this info on the site.
thanks again
Barry