Question about 2002 Yamaha Road Star Midnight
Been running mine now for 36,000 miles on Castrol GTX 10W40, and have had no problems!
Posted on Nov 25, 2009
Depends on the temperature of the region you ride. I have a Roadstar 1600 in Australia so it gets quite warm and also quite cold (range 0 - 40 deg C. I'm currently using Motorex 10W/60 4T Synthetic and it's great, copes well with a cold start as well as keeps the engine quiet on hot days. The workshop manual hovers around the grade of 10W40 for most applications but i think this grade is too thin for hot work. As to brand, there are many, make sure it's for motorcycles though (4T / JASO ) as you will experience clutch slip with that much torque availalable and moly enhanced oils, (friction modified) car oils in the crankcase.
Posted on Sep 16, 2009
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Posted on Jan 02, 2017
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