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I have managed to accumulate a couple of Kawasaki GPz1100’s over the last couple of years. All are in running order and all will get a “make over” in due course. The collection consists of (in date order), a 1981 GPz1100B1, 1982 GPz1100B2 and a 1983 GPz1100A1 (also known as a ZX1100A1). To help others I wrote an article on the GPz1100 series on Wikipedia as a reference between the different models.
In July 2008 I purchased a complete and running GPz1100B1 for $2000. it had been sprayed black with gold pin stripping, it rode OK but could be substantially better and it needed some suspension work done, the rest of the history is unknown. its been sitting now for 9 years in the garage and plans are afoot to build it as an ELR replica to match the B2 currently being completed.
At this stage I will keep the DFI system as its still (mostly) fitted and working OK but I will try to convert it to a Megasquirt and tweaked to suit the 1100 engine characteristics. Recently I caught a glimpse of one fitted with a GP exhaust and that’s given me ideas to fit one.
I purchase my GPz1100B2 in February 2008 for $2000. It was up for auction on eBay but I missed getting to a computer in time and the auction ended! lucky for me there were no bids as the model was not popular despite it being in my opinion the most reliable Zed ever build prior to the GPz900R. I contacted the seller and he agreed to let me have it, subject to inspection, for the offer price. The owner had it for 16 years but had only ridden it a few times in the last couple of years and due to a lack of maintenance the brakes were seized and the clutch often locked up when the lever was pulled in. The disks were worn but the motor starts first go and purrs as it had just been rebuilt with a 1175 kit and a bit of extra work. I have not confirmed the large pistons but in the future when the engine needs a strip I will be able to measure everything and see if this is the case.
Other points to note are that the calipers were full of crap and needed a good clean up to remove the build up of grime that often occurs around the seal.