Kawasaki Z1000 Turbo Reborn

Bevelheadmhr

Coast to Coast
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I've wanted to buy my old Turbo Zed back for awhile, as its owned by a friend. He started to restore / modify it but hasn't been able to do much with it for a few years. Like me he has other bikes that need work, and there's only so much time and money he can devote to his projects. So today I bought it back, though its now in pieces.

The bike was built in the mid eighties as a road legal drag bike.. I'm told by the original owner that it was one of the fastest such bikes of the time.

Fast forward twenty years, the poor Zed had been left languishing in a damp shed when I saw it, bought it and brought it home. The engine was stripped and found to have bent conrod and other serious problems.

My original plan ten years ago, was to restore it back to its turbocharged glory. But as ever life gets in the way and I sold it on to my friend who had other plans for the old Zed.

The turbo has long gone, as have the lightweight wheels, forks, frame an bodywork! But even so the engine is still something special. It has a Orient Express big block which allows it to be take a set of big pistons, taking the engine from 1000cc up to 1400cc. Oh and it also had homemade Nitrous Oxide injection too... that was super dodgy so it wont be used.

The good news is that the bike comes with a different Z frame, that's been braced and strengthened and modified to take wider modern wheels, its even powder coated. In place of the classic Z1 bodywork, it comes with a mint set of bodywork from a late seventies Z1000 Mk2, along with a swingarm and forks from a later ZXR1200.

I'm still thinking about which way to take the Zed... build it as a road bike, turbo it, or maybe go for broke and build a 'show bike' with lots of high end parts... inspired by the Japanese custom house ''Sanctuary RCM'' Google them they are v impressive bikes.

How it looked when I bought it more than ten years ago..
 

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doc_rot

Oh the usual... I bowl, I drive around...
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thats gotta be putting out close to 180HP! turn that z1 frame into a pretzel, love it! I personally love the MKII bodywork so that has my vote. Looks like it has MKII cases and a J model head. what other goodies are in there? Can't wait to see what you do with it.
 

Bevelheadmhr

Coast to Coast
DTT BOTM WINNER
thats gotta be putting out close to 180HP! turn that z1 frame into a pretzel, love it! I personally love the MKII bodywork so that has my vote. Looks like it has MKII cases and a J model head. what other goodies are in there? Can't wait to see what you do with it.
MK2 cases, GPz1100B head, Orient express block, 1400cc MTC forged pistons, welded crank, flowed head. Used to run high 9's back in the mid 80's, on street tyres.
 

Streetfighterkz

Been Around the Block
I’ve not seen a double clubfoot arm used with shocks before. I’ll be following along as I have a bunch of parts for a 1428 13.5:1 Pro-street style build I’ve stored away.

Later, Doug
 

JadusMotorcycleParts

Over 1,000 Posts
DTT SUPPORTER
I'm in! Yes, Sanctuary build lovely bikes - drool worthy. Pretty $$$ from the look of it!

By the look of the set up, it was drawthru? And by the looks of it, one tube tube/line from the intake plenum is for a boost gauge? And the other one is connected to a valve in the exhaust header? Is that a boost referenced external wastegate? I am excited!
 

Bevelheadmhr

Coast to Coast
DTT BOTM WINNER
To be clear, the Turbo system has long gone so it wont be turboed. But it will be 1428cc, with a new welded, balanced crank and lots of cool stuff thrown at it. Got to finish a couple of other projects first, but I already have a long list of expensive parts it'll need.. Starting with pair of Dymag wheels.
 

JadusMotorcycleParts

Over 1,000 Posts
DTT SUPPORTER
To be clear, the Turbo system has long gone so it wont be turboed. But it will be 1428cc, with a new welded, balanced crank and lots of cool stuff thrown at it. Got to finish a couple of other projects first, but I already have a long list of expensive parts it'll need.. Starting with pair of Dymag wheels.
Oh yeah, sorry, got carried away with my own fantasies.

I guess boring it to 1428cc will solve the low comp turbo piston problem.

Looking forward to result even sans-turbo :)
 

Bevelheadmhr

Coast to Coast
DTT BOTM WINNER
Oh yeah, sorry, got carried away with my own fantasies.

I guess boring it to 1428cc will solve the low comp turbo piston problem.

Looking forward to result even sans-turbo :)

The engine had a spacer plate beneath the block to lower the compression for the Turbo... remove the plate and the compression should be back up to 'normal'. It also needs cams, not sure what lift/duration to go for yet. But its early days, besides my mate is a real Zed Head, so will go with his advice. Below is one of his road bikes..
 

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Scooter trash

Been Around the Block
Turbo bike are high maintenance, always needing something. I have 53K miles on this one running 15lbs boost. Clutches have piled up until I went to a two stage lockup. Fuel economy is 35 mpg taking it easy, and .4 mpg at full throttle. Most of the time the 73 Tiger gets the attention, it's simple to a fault but not a high speed cruiser, 70 mph is working it pretty hard.
 

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Bevelheadmhr

Coast to Coast
DTT BOTM WINNER
The engine is being built for torque rather than outright top end horsepower. In the pic below, we see the frame as it sits today, but the ZXR shocks and wheels will be replaced with lighter, better items from Maxton and Dymag respectively.
 

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Bevelheadmhr

Coast to Coast
DTT BOTM WINNER
Having finally pulled the tank and bodywork out of its packing, I've had a change of heart regarding the repaint. The original paint is just too good to be resprayed. The tank did around 2000 miles on the bike, before it was removed and stored for many years. So now I'm just going to have the ZRX12 front mudguard colour matched, and also have a small scratch on the tail section sorted out.

Meanwhile the ZRX forks have been rebuilt with new stanchions from Tarozzi. I had wanted to go for the gold Ti option, but the supplier said its not available for the ZRX. However, they could have the new stanchions coated for me... for £303 on top of the £288 for the stanchions. Thought that was too much, so will not bother for now.
 

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Jimbonaut

Over 1,000 Posts
DTT SUPPORTER
I concur, colour that nice will only be original once. Good decision


Sent from my iPhone using DO THE TON
 

Bevelheadmhr

Coast to Coast
DTT BOTM WINNER
The engine cases have been cleaned and carefully checked to make sure they have no cracks or damage. That done the cases and block are going off to be powder coated in satin black next week, as soon as our current lockdown ends.
 

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Bevelheadmhr

Coast to Coast
DTT BOTM WINNER
The forks are now rebuilt with new Tarozzi stanchions, the sliders had been powder coated satin black awhile ago, which caused a problem. The damping adjusters at the base of each leg had to be removed when they were powder coated, something that isn't supposed to be done. As the spring and ball bearing inside slightly damaged the 12x1 thread in the mechanism. Fortunately they were cleaned up with a tap and die and the forks could be finished. The chassis looks a bit nose down, but once the engine is back in the frame, its weight should bring the lower frame rails parallel with the ground.
 

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