Trials riding and competition was a major market in the '70s. Two-stroke motorcycles rose to the forefront because of their light weight vs. the typical converted British bikes. Trials bikes were typically fitted with heavier flywheels to help with momentum. The 175 class was actually one of the bigger classes! This unit is remarkably clean and original. It appears that only the hand grips may have been changed in its 46 years of existence. Nice, original high exhaust and seat complete the package.