The legendary Z1-R turbo returns

Z900RS gets a supercharger!

At last year’s autumn Tokyo Motor Show, as the Z900RS model was announced a Doremi Collection custom machine was exhibited that caused quite a stir. Well, at this year’s Tokyo Motorcycle Show three souped-up Z custom bikes have been released all in one hit!

1: “Mk.ll” Style

The old mk-ll style gets fitted with a supercharger!

The first version has been newly made with an original exterior based on the motif of the old Z1000 mk.ll, and is a monster version fitted with a supercharger. As the ZRX1200DAE is now out of production, this will fulfil the desires of Z bike fans who are unable to buy new models. This is a one off Doremi original that applies the technique of placing an internal tank under the cover of the tank, and things like the side covers and tail cowling have all been made to match up accordingly. The supercharger is an MS-sailing (prototype).

In contrast to the original Z1000 mk.ll the upper part of the tank has increased in volume, but this area inside the front of the tank is for downdraft to enter the Z900RS air box cleaner, and moreover is essential in order to facilitate the use of a supercharger. It seems that as a result the volume of the tank is also based on this. Also it appears that if you use the tank from the Z1 USA custom that is coming up next to be introduced, the volume of the upper area can be lessened more, so this makes it possible to gain a stronger feeling of the original. The exterior parts for the mk.ll style are currently being developed. We would like to think that this the outcome of the various users that dropped by at the Tokyo Motorcycle Show to have their say about commercialisation.

The tank cover for the mk.ll style gives a taste of what you can’t get with the standard Z900RS teardrop tank. Even the positioning of the fuel tank cap is particular in implementing a beautiful balance.

The mk.ll style side cover does a great job of mimicking the original. Around this area you can appreciate the characteristics of the Doremi Collection in how it has handled the Zephyr customs exterior styling so well up to now. Features like the tail cowling, fender-less kit, and the seat match in such a way that the rear certainly offers a close resemblance of the mk.ll and FX from back in the day. The indicators also recreate the style well from that period.

The mk.ll style side cover does a great job of mimicking the original. Around this area you can appreciate the characteristics of the Doremi Collection in how it has handled the Zephyr customs exterior styling so well up to now. Features like the tail cowling, fender-less kit, and the seat match in such a way that the rear certainly offers a close resemblance of the mk.ll and FX from back in the day. The indicators also recreate the style well from that period. The Doremi custom Z uses Moories magnesium wheels, not to mention what else the rest of this bike offers in terms of spec. These wheels are already in production and the front and rear set costs around $2,750 before tax. This product complies with the Japan Light Wheel (JWL) requirements. Front wheel size: 2.75-18 inch. Rear wheel size: 4.50-18 inch.

This original black four pipe exhaust racing system (around $2,500 excluding tax) made by Doremi does not comply for vehicle inspection, but a road worthy system is now in development.

The rearsets retail at around $575 before tax. The sizing of the footrests closely mirrors the the classical image of the rubber footrests, costing around $5 each excluding tax.

The supercharger prototype is produced by MS-Sailing. The turbine and belt are situated on the right hand side of the bike, with the air intake arranged on the left hand side.

2: “J” Style

Eddie Lawson “J” racer custom

The second version is based on the motif of Eddie Lawson’s Z1000J AMA superbike that was famous for being thrashed about at high speeds. The side covers, tail cowl, front fender and seat are an awesome custom style that is also currently being developed by Doremi. It is a surprise to be able to see how even with just the standard paint work it looks so good. The mufflers (42.7mm) on the exhaust pipes are a megaphone silencer original, and seem as though they will be popular in matching up with the mk.ll custom style that uses four mufflers.

While the tank is standard, the side covers and seat recreate the J form beautifully. We have certainly been able to sense the breadth of possibilities with the Z900RS custom.

The core guard for the radiator produced in stainless steel with etching is available for around $135 excluding tax. The bits of road dirt that tend to blow up around the centre of the tyre are less of an issue than around the side.

The muffler set is a Doremi megaphone type that is in the midst of development. As expected the Kerker style suits the J very well.

The black type rearsets (around $575 excluding tax) fitted with rubber footrests (around $5 excluding tax) heighten the classic feel.

3: “Z1” Style

Z1 AMA racing style lineage evolution

The third version probes the Z1 style yet further, and has been finished in a way that will be appreciated by US fans. Features like the tank cover, tail cowling and side cowlings are heightened from the original. Also, there is a bikini fairing, plated fender and four-pipe exhaust system. Even adorning these parts individually on a standard Z900RS seems as though it would set off a top impression.

There is also development underway for a plated four-pipe muffler that has been in great demand. There are also plans for products that are fit for road use, so fans can look forward to this.

The bikini front fairing with strengthened ABS plastic is currently on sale for around $135 excluding tax. There are also other things included in a package such as a screen, cowlings, metal fixings & bolts. The production versions are unpainted.

Although the Z1 style cowling (around $165 excluding tax) and the Z1 style side covers (around $75 excluding tax) are still under development, it seems like it won’t be too long before market sale release. This is not the type of FRP that has the tendency of lacking in strength, but is made with strengthened ABS plastic.

Other info

Together with the information about “Doremi collection releasing a base model Z900RS”, here at Young Machine we also obtained the news about “the likelihood of a spec with a supercharger” as a scoop. It turns out that this is true of what had already been prepared in the outset with our CG picture. When one speaks of the old spec Z supercharger, it is the “Z1-R TC”! In this flow of events the Z exterior gets the supercharger set in the silhouette of the Z1-R, and gets the three stripe colour Molly design. If you can manage to get your hands on a Doremi collection exterior and supercharger kit, this would surely be sufficient as a decent custom machine.

This is the Z1-R TC based on the motif of the Young Machine custom CG machine. At the time in 1977, Turbo-cycle corporation purchased the remaining unsold Z1-R’s in America, and then added turbo kits before putting them up for sale again.

Incidentally, at the time Japan also imported the Z1-R TC and sold them for around $13,250. This was covered in a test ride in Young machine’s 1979 November edition. That bike turned into an absolute brute once past 7,000 rpm, had a quarter-mile time of 11 seconds, and introduced a top speed of 245km/h.

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天然のヤング脳を持つ伝説の元編集部員。現在は超フリーライター。

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