Difference between revisions of "Yamaha TZ350"

#    The provision of a new "6 port" cylinder, with subsequent improvement in rideability, with an improvement in peak power output to boot. Also new "cross-over" style chambers to keep the muffler tips within FIM requirements length wise and a new piston. The "F" pistons were the first of the short pin "slipper" type but the side windows didn’t have the support web running down the middle, and the ring sometimes pulled the edge of the piston down into the window.

#    The provision of a new "6 port" cylinder, with subsequent improvement in rideability, with an improvement in peak power output to boot. Also new "cross-over" style chambers to keep the muffler tips within FIM requirements length wise and a new piston. The "F" pistons were the first of the short pin "slipper" type but the side windows didn’t have the support web running down the middle, and the ring sometimes pulled the edge of the piston down into the window.

#    The inclusion of 38mm "Powerjet" [[Mikuni]] carburettors to further enhance the new engine's  usability through the ability to fine-tune the midrange mixture more effectively and also reduce the risk of [[seizure]] at high rpm, while actually contributing to the increase in peak output at the same time.

#    The inclusion of 38mm "Powerjet" [[Mikuni]] carburettors to further enhance the new engine's  usability through the ability to fine-tune the midrange mixture more effectively and also reduce the risk of [[seizure]] at high rpm, while actually contributing to the increase in peak output at the same time.

#    A new, revised, lighter weight frame, which had a bad tendency to fail around the headstock, which is why so many of them were re-inforced in this area, or had aftermarket frames replacing the Yamaha items.

#    A new, revised, lighter weight frame, which had a bad tendency to fail around the headstock, which is why so many of them were re-inforced in this area, or had aftermarket frames replacing the Yamaha items.

#    New forks featuring 3-way adjustable spring preload via. an external adjuster on top of each fork tube, as well as revised fork internals designed to reduce the front end "patter" being experienced by a number of 350 riders.

#    New forks featuring 3-way adjustable spring preload via. an external adjuster on top of each fork tube, as well as revised fork internals designed to reduce the front end "patter" being experienced by a number of 350 riders.

#    A new fairing which dispensed with the separate belly pan and was a sharper shape at the bottom-front (behind the front wheel). The fuel tank was now a tapered shape to match the sloping upper frame rails and the seat unit was changed to a more "current" shape.

#    A new fairing which dispensed with the separate belly pan and was a sharper shape at the bottom-front (behind the front wheel). The fuel tank was now a tapered shape to match the sloping upper frame rails and the seat unit was changed to a more "current" shape.

The 350 "G" was never really improved on, despite Yamaha releasing another model, the "H", which was really just a case of the factory using up a lot of it's stock of  parts, giving up further production of the mighty TZ350 once the [[FIM]] dropped the 350cc World Championship class in 1982.

The 350 "G" was never really improved on, despite Yamaha releasing another model, the "H", which was really just a case of the factory using up a lot of it's stock of  parts, giving up further production of the mighty TZ350 once the [[FIM]] dropped the 350cc World Championship class in 1982.

==1980 TZ350==

==1980 TZ350==

By the end of 1978 it was clear that Yamaha needed to revise the [[TZ350|TZ350]] if it was to maintain its dominant position in the 350 class, consequently for 1979 [[Yamaha|Yamaha]] introduced a considerably revised version of their hugely successful TZ350. Typed the F the new machine adopted a new, lighter monoshock frame partnered by an alloy box section cantilever swinging arm and three way adjustable front forks. The new frame housed a revised version of Yamaha's illustrious liquid cooled two stroke twin, now equipped with a 6 port cylinder producing a claimed 72bhp @11,000rpm. New, more aerodynamically efficient bodywork completed the overhaul. The following season saw the introduction of what for many is the ultimate TZ350, the "G", which built on the success of the "F". Few modifications were deemed necessary and those that were undertaken were largely in the interests of improving the machines already excellent reliability. The [[connecting rod]] design was revised and the piston strengthened whilst the ignition rotor mounting was modified. Original TZ350G are now highly sought after by enthusiasts.  

By the end of 1978 it was clear that Yamaha needed to revise the [[TZ350|TZ350]] if it was to maintain its dominant position in the 350 class, consequently for 1979 [[Yamaha|Yamaha]] introduced a considerably revised version of their hugely successful TZ350. Typed the F the new machine adopted a new, lighter monoshock frame partnered by an alloy box section cantilever swinging arm and three way adjustable front forks. The new frame housed a revised version of Yamaha's illustrious liquid cooled two stroke twin, now equipped with a 6 port cylinder producing a claimed 72bhp @11,000rpm. New, more aerodynamically efficient bodywork completed the overhaul. The following season saw the introduction of what for many is the ultimate TZ350, the "G", which built on the success of the "F". Few modifications were deemed necessary and those that were undertaken were largely in the interests of improving the machines already excellent reliability. The [[connecting rod]] design was revised and the piston strengthened whilst the ignition rotor mounting was modified. Original TZ350G are now highly sought after by enthusiasts.  

[[Category:Yamaha motorcycles|TZ350]]

[[Category:Yamaha motorcycles|TZ350]]

[[Category:Yamaha TZ series]]

[[Category:Yamaha TZ series]]