Maintenance Specs for Suzuki GR150
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Recommended Fuel Octane : 95 Ron Unleaded Fuel
Maximum fuel capacity : 12.5L ( maximum recommended fueling is 11 liter )
Warning: Using incorrect or low-quality fuel can cause problems like engine misfires or sluggishness in motorcycles. When fuel with an insufficient octane rating for the engine's compression ratio is used, it can lead to premature ignition or knocking, resulting in decreased engine performance. Moreover, low-quality fuel may contain contaminants or additives that can adversely impact combustion and engine function. It's crucial to adhere to the recommended octane rating and opt for high-quality fuel to maintain optimal performance and prolong the engine's lifespan.
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Clutch lever Free play : 10 mm - 15 mm
Throttle cable Free play : 2 - 4mm
Rear Brake Pedal FreePlay : 20-30 mm
Chain Slack Or FreePlay : 20-30mm
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Standard Spark Plug no. : NGK CR6E
Cold Spark Plug: NGK CR7E
Hot Spart Plug: NGK CR5E
Spark plug Gap : 0.7 mm - 0.8 mm.
Spark Plug Tightening : 1/2 or 180° for new spark plug for first time and 1/8 or 45° to 90° turn for old spark plug
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Engine idle speed : 1500 Rpm ± 100 Rpm
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​Recommended engine oil specs: SAE(10w-40),API SJ, JASO MA
Recommended oil viscosity by Suzuki: 10w-40
viscosity for summers: 20w-50 or use 10w-40 fully synthetic engine oil in summers
viscosity for winters: 10w-30 or 10w-40
Note: only use10w-30 when ambient temperature is less than 30 degrees celsius.
Using thicker viscosity engine oil 20w-50 can cause a reduction in fuel economy.​
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Minimum Engine oil API Standard: API SG, MA
Recommended Engine oil API Standard: API SL, MA
Oil Change Interval : 4000 km or earlier ( depends on riding conditions and engine oil type )
Note: use only quality synthetic engine oil for more than 3000 km​
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Recommended engine oil viscosity according to viscosity chart
-20 to 30 degrees celsius =10w-30
-20 to 40 degrees celsius=10w-40
-10 to 40 or above celsius = 20w-50
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Recommended Brake Fluid : DOT3 or DOT4
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Recommended Front Tyre Size : 2.75/18
Recommended Rear Tyre Size : 90/90/18
Recommended Minimum Tyre Tread Depth: 1mm
Front Tyre Pressure : 25PSI
Rear Tyre Pressure : 29PSI with rider only, and with pillion 40PSI
Note: Before securing the spark plug, hand-tighten it to ensure it's correctly aligned. Then, using a spark plug wrench, rotate the spark plug half a turn to the right for initial tightening. After this step, slightly loosen the plug before tightening it again to the right, this time by about 1/8 or 45°. This process is essential for properly positioning the spark plug gasket in the head, ensuring a snug and secure fit.
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Warning: The torque specifications mentioned are tailored for the Suzuki GR150 series spark plug. To ensure proper installation and prevent any damage or incorrect fitting, it's crucial to consult your motorcycle's owner's manual for the precise torque specifications applicable to your spark plug.