Yamaha Rx 135 Service Manual |link| -

The RX 135 is known for having "mild" port timing compared to the older RX100.

In the pantheon of motorcycling, few machines command the reverence of the Yamaha RX 135. Produced in India from the late 1990s until the tightening of Bharat Stage III emission norms in 2010, the RX 135 was not merely a commuter; it was a symphony of noise, vibration, and raw power. But the true soul of the machine—its logic, its limits, and its longevity—was not found in the fuel tank or the exhaust pipe. It was found in the greasy, dog-eared pages of the Yamaha RX 135 Service Manual . yamaha rx 135 service manual

The right-side crank seal (under the magneto) fails constantly on old RXs. The manual shows the the seal must sit—not flush, but 1.5mm recessed. Too deep? It blocks the oil passage. Too shallow? The magneto rotor rubs. The RX 135 is known for having "mild"