Check the battery electrolyte level and top up with distilled water if applicable. Every 10,000 km (Major Overhaul Inspection)
If the engine has low compression or makes knocking sounds.
The Yamaha RX 135 (also affectionately known as the RX-K in Southeast Asia or RX-King in Indonesia) is more than just a motorcycle; it is a legendary two-stroke icon. Known for its explosive performance, lightweight chassis, and distinctive exhaust note, the RX 135 continues to command respect on the roads even decades after its release.
Always use new paper gaskets and copper washers during reassembly to prevent oil and vacuum leaks.
Start the warmed-up engine. Turn the air screw slightly in or out until you find the highest idling RPM, then reset the idle speed screw to 1,300 RPM. 2. Autolube 2T Pump Adjustment yamaha rx 135 service manual
Are you dealing with a like wiring, carburetor tuning, or an engine rebuild?
A: The core engine and chassis procedures are largely the same. The main differences lie in the transmission, gear ratios, and potentially some related settings. The correct service manual will distinguish between the two.
Adjust the throttle stop screw until the engine idles smoothly between 1,200 and 1,400 RPM. 2. Ignition Timing and Spark Plug Gap Spark Plug Type: NGK BP7HS or CHAMPION L82YC.
Modern digital manuals allow you to zoom in on vacuum and wiring diagrams , which is a lifesaver compared to greasy, faded paper books. Check the battery electrolyte level and top up
By referencing these factory specifications and systematic procedures, you can preserve the performance, longevity, and valuation of your Yamaha RX 135 for years to come.
The manual says: Standard main jet #130, pilot #15, air screw 1.5 turns out. If you add an expansion chamber (like an old RDD pipe), you don’t guess. You start at #140 main jet and read your spark plug color. The manual shows you how to remove the carb, clean it, and what a correct plug chop looks like.
Incorrect timing causes engine knocking (too advanced) or sluggish performance and backfiring (too retarded). 5. Engine Top-End Overhaul and Decarbonization
Use a torque wrench when tightening cylinder head nuts (standard factory spec is 18–22 Nm) to prevent warping the cylinder head. Turn the air screw slightly in or out
Before diving into the manual, it is important to understand the machine it covers. Introduced in the mid-1980s, the Yamaha RX 135 quickly became a benchmark for performance and reliability in the 135cc segment. It is a single-cylinder, air-cooled, two-stroke road motorcycle that was produced by Yamaha from 1987 onward. The "RX" series, including the RX 100 and RX 135, carved out a cult following thanks to its lightweight design (weighing only around 109 kg dry) and punchy engine that delivered a thrilling ride experience. The 134cc engine was known to produce approximately 14 HP, a significant figure for its time, making it a favorite among those who appreciated a responsive and agile motorcycle. The RX 135 was offered in several iterations, including a 4-speed version and a later 5-speed model, which featured a 132cc engine producing 14.2 PS at 7,500 rpm and 12.3 Nm of torque at 7,000 rpm.
Identify problems like poor starting, lack of power, or overheating.
Wash the foam element in safe solvent, squeeze dry, and coat with fresh 2T oil.