Yamaha SZR660
Encyclopedia
Yamaha SZR660 is a single-cylinder sportbike produced by Yamaha Motor Corporation from 1996 to 2001. It shares engine with Yamaha's XT660
line of dual-purpose on/off road motorcycles, but employs this engine within a Supermono
package.
The 659-cc single-cylinder bike makes the most of its relatively modest power output by virtue of its light, stiff frame.
The Yamaha SZR660 was built in Italy and equipped with Italian made Paoli
USD (Up Side Down) front forks and Marzocchi
rear shock-absorber.
The chassis is from the Belgarda (Yamaha Italy) TZR 250 Sports two-stroke road bike. The engine is from the Yamaha XT660 Trail machine, so this bike is a hybrid. It was imported into Australia in small numbers by enthusiastic private Yamaha dealerships and was never a mainstream Yamaha Australia Model. In original pricing it exceeded $10,000, but values dropped after a few years. Today the acceptance of the SZR660 as a Learner Approved Motorcycle in most states has refirmed its values. As a learner bike it would provide reasonable performance and reliability.
The SZR660 is a testimonial to the development of CNC engineering. The proximity of the engine to the chassis and other components is demonstrably smaller than many other models and this machine could not have been built to such a standard in earlier years.
Regular maintenance on this engine in such a confined space will definitely challenge the average owner. (for instance, to change the spark plug it is essential to use the special tool supplied in the kit (with a sponge internal plug "gripper") as well as removal of: the mirrors; fuel tank and droppoig the radiator from its rubber mountings.
The 660 engine incorporates a FIVE valve cylinder head, one of the last Yamahas manufactured with such a feature.
There are three intake and two exhaust valves. The theory is that the smaller valves have a larger area at a lower weight than a four valve system and allow maximum intake flow and velocity.
The 660 engine has a unique external dry sump, in order to reduce overall engine size compared to a traditional wet sump engine.
The fuel tank incorporates an inbuilt fuel pump, to lift the contents of the tank to the twin carburettors.
The fuel system incorporates one slide carb and one butterfly carb. These are operated sequentially by a manually adjustable system.
Performance wise the chassis shines. Experienced motorcyclists have said that the bike is "the best handling machine I have ever ridden".
Unfortunately the engine performance means that these statements are made after long descents.
The SZR has difficulty exceeding 160 km/h in stock form, with its bulky muffler and restrictive carburettor system.
Comfort wise the chassis was designed with Junior Italian riders in mind, so it can be a little cramped, but the seat is comfortable and the vibrations of a big single are well dampened. The unique styling of the fuel tank can lead you to experience an unintentional "heimlich maneuver" when travelling downhill and hitting a large bump, but that's the worst that can happen to you on this bike.
Ownership Tips
As the SZR is electric start only, make sure the battery is well maintained (it's a small battery for such a big engine) and if you manage to push start one of these bikes on a flat battery I believe you will need to be an olympic athlete.
Yamaha XT 660
The Yamaha XT660 is dual-purpose on/off road motorcycles released by Yamaha Motors as a replacement for the XT600.It is a development of the original XT series , a line of motorcycles inspired by those used on the Paris Dakar rally...
line of dual-purpose on/off road motorcycles, but employs this engine within a Supermono
Supermono
Supermono is a class in European motorcycle road racing. Supermono class machines have a single-cylinder engine with a maximum displacement of 850 cc....
package.
The 659-cc single-cylinder bike makes the most of its relatively modest power output by virtue of its light, stiff frame.
The Yamaha SZR660 was built in Italy and equipped with Italian made Paoli
Paoli
Paoli may refer to:People:*Amalia Paoli , Puerto Rican soprano, sister of the better known Antonio Paoli*Ambrose De Paoli , Roman Catholic cleric and Papal Nuncio*Angelo Paoli , Italian Carmelite...
USD (Up Side Down) front forks and Marzocchi
Marzocchi
Marzocchi is an Italian manufacturer founded in 1949 by the two brothers Stefano and Guglielmo Marzocchi. The company profile includes hydraulic industrial pumps and suspension components for motorcycles and bicycles...
rear shock-absorber.
The chassis is from the Belgarda (Yamaha Italy) TZR 250 Sports two-stroke road bike. The engine is from the Yamaha XT660 Trail machine, so this bike is a hybrid. It was imported into Australia in small numbers by enthusiastic private Yamaha dealerships and was never a mainstream Yamaha Australia Model. In original pricing it exceeded $10,000, but values dropped after a few years. Today the acceptance of the SZR660 as a Learner Approved Motorcycle in most states has refirmed its values. As a learner bike it would provide reasonable performance and reliability.
The SZR660 is a testimonial to the development of CNC engineering. The proximity of the engine to the chassis and other components is demonstrably smaller than many other models and this machine could not have been built to such a standard in earlier years.
Regular maintenance on this engine in such a confined space will definitely challenge the average owner. (for instance, to change the spark plug it is essential to use the special tool supplied in the kit (with a sponge internal plug "gripper") as well as removal of: the mirrors; fuel tank and droppoig the radiator from its rubber mountings.
The 660 engine incorporates a FIVE valve cylinder head, one of the last Yamahas manufactured with such a feature.
There are three intake and two exhaust valves. The theory is that the smaller valves have a larger area at a lower weight than a four valve system and allow maximum intake flow and velocity.
The 660 engine has a unique external dry sump, in order to reduce overall engine size compared to a traditional wet sump engine.
The fuel tank incorporates an inbuilt fuel pump, to lift the contents of the tank to the twin carburettors.
The fuel system incorporates one slide carb and one butterfly carb. These are operated sequentially by a manually adjustable system.
Performance wise the chassis shines. Experienced motorcyclists have said that the bike is "the best handling machine I have ever ridden".
Unfortunately the engine performance means that these statements are made after long descents.
The SZR has difficulty exceeding 160 km/h in stock form, with its bulky muffler and restrictive carburettor system.
Comfort wise the chassis was designed with Junior Italian riders in mind, so it can be a little cramped, but the seat is comfortable and the vibrations of a big single are well dampened. The unique styling of the fuel tank can lead you to experience an unintentional "heimlich maneuver" when travelling downhill and hitting a large bump, but that's the worst that can happen to you on this bike.
Ownership Tips
As the SZR is electric start only, make sure the battery is well maintained (it's a small battery for such a big engine) and if you manage to push start one of these bikes on a flat battery I believe you will need to be an olympic athlete.