So there are few left and even fewer in original condition. To find out, another of the production TZ750s was run on a rolling road at a Dutch testing station. Unlike Paris, Share this Article Tweet Print Email a Friend Go Back Print this page By Troy Siahaan December 27, 2013 0 For just $120,000, you too can be the owner of a special piece of motorcycling history. A user-friendly touch was that the gear-change shaft projected out of each side of the cases, so that linkages were unnecessary to switch sides. 1973 Yamaha TZ 750 For Sale It’s a ’73 750 that had been originally built as a streetfighter by Dr. Sean Dwyer. Yamaha's new F750 contender drew on the Hamamatsu firm's tried-and-tested two-stroke technology, its engine looking like two TZ350 twins on a common crankcase, although in actual fact few components were shared. Formula 750 had originally been devised to promote superbikes such as the BSA and Triumph 750 triples, Honda’s CB750, Suzuki’s GT750 and Kawasaki’s 750 H2. The engine of the 1975 0W29 was increased to a displacement to 748cc and the chassis featured Monocross suspension and a 1-up, 3-down muffler design. Opening up beyond 8000rpm, as Chas had warned, the engine hit its power band and the front wheel lifted, forcing me to grip the tank and hang on as if I was on some out-of-control roller coaster, desperately trying to get more weight over the front end. This is a very nicely put together custom using many top-drawer components like the Spondon frame fame and swing arm, Swarbrick exhaust, C&J Radiator, TZ500 monoshock, custom tank and seat. It took a while to jog his memory of the bike.
Kawasaki’s bigger 903cc Z1, which was ineligible for F750, turned out 82bhp which when it was launched in 1972 stunned the motorcycling world. “Christ, it’s so quick,” said Chas. “That bike made me a lot of money,” he recalled.
The most potent of these, the two-stroke three-cylinder Kawasaki, churned out 74bhp. The engine of the 1975 0W29 was increased to a displacement to 748cc and the chassis featured Monocross suspension and a 1-up, 3-down muffler design. A Full set of engine O-rings with many spares. Spiral gears from the countershaft drove a gear pump in the sump to force lubricate the six-speed gearbox. Soon after, Kel Carruthers, the former world 250cc champion who masterminded the rise to fame of Kenny Roberts, tested a prototype 750 four, codenamed YZ648/OW19, in the US. The TZ350's 64x54mm bore/stroke dimensions were retained, giving the first TZ750 model (retrospectively re-designated TZ750A) a capacity of 694cc. Four exhaust pipes were crammed into the fairing, their profiles altered from conventional expansion chamber practice to get them to fit without impeding cornering clearance. The crankcase drive arrangement meant that the crankshafts rotated backwards, so that the piston thrust was on the exhaust port side of the cylinder bore. The plugs were oiling up with an over-rich mixture. On a TZ350 the sudden and intoxicating rush of power could at least be kept under control simply because it was much lighter, but the big four was in another league with corners rushing up and looking increasingly narrow at frightening speeds. Sinking into the seat I was surprised that it didn’t feel much bigger than the 350, apart from the wider fuel tank. 'But, as I said at the time, if ever there was a Jekyll and Hyde motorcycle, this was it. The "A" version was actually a 700cc, the cylinder bores were increased to give 747cc in 1975. Also unlike the TZ350 twins, the TZ750 used reed-valves in the intake ports fed by a bank of four Mikuni 34mm carburettors, while the exhaust port timing was shortened to widen the power band. As confidence built up I then had the sobering realisation that I’d been using only the four lower ratios of the six-speed gearbox. It wasn’t a 750 though. Added to this, the steering was light and the controls silky, even the twistgrip with four cables to the carbs. I bought another TZ750 for the next season but I hated it. I was chasing works rider Hideo Kanaya who crashed into a slower rider while he was leading.
Shifted with my hand a lot!! Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. But, as I said at the time, if ever there was a Jekyll and Hyde motorcycle, this was it. But opting out of some of these cookies may affect your browsing experience.
It looks like its had more action than Paris Hilton's bed. Fourth was good for more than 140mph at 10,000rpm and there were still two more ratios to use on the Daytona gearing that equated to 170mph in top. Until it was fired up at the recent Telford classic off-road and racing show, it had never been run. The new Yamaha engine consisted of two 350-cc.
Above all it was, dare I say, almost comfortable with plenty of room to tuck in behind the fairing bubble. Nov 3, 2019 - Explore Robert Eckles's board "TZ750" on Pinterest. Full set of gaskets with spares.
As a development of the previous Yamaha roadster twin designs, the vertically split, twin-cylinder engine is compact and powerful, this in turn is wrapped in an equally diminutive frame that does its best to hold the wheels inline and weighs next to nothing in the bargain. The 0W31 introduced in 1976 was developed with the 0W29 engine and the YZR500 (0W23) chassis as its base units.The exterior styling was based on the YZR500, which distinguished it clearly from the production model TZ750. Claimed by the current owner to be the test mule of none other than Kel Carruthers in 1973, this TZ carries the number #409-100001.
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