Norton Clipper Blockbuster BBC347 Owner's Manual page 29

Check the engine oil level before each use when the engine is cool and the engine is level.
Add oil if the level is low. The oil level should be within the operating range (see the engine
owner's manual for details).
Only use a high-detergent, premium quality motor oil certified to meet or exceed U.S.
automobile manufacturer's requirements for Service Classification SG, SF/CC, CD. Motor
oils will show the classification on the container. A SAE viscosity of 10W-30 is recommend
by Honda for general, all temperature use. Please consult the below chart or contact your
local Honda service center for the proper viscosity for your temperature range.
Always refer to the engine manual for more detailed information on checking the oil,
changing oil, and oil capacity, air filter changes, and fuel type to use.
Use only Honda air filters. Do not clean the air filter with gasoline or other flammable
solvents. A fire or explosion could result. To clean, follow the instructions found in the
Honda engine manual.
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