2003 rc51 , time for fork seals , what weight oil to use - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 3 (permalink) Old 08-05-2011, 03:35 PM Thread Starter
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  • Penske triple adjustable shock Moriwaki linkage
  • forks , valves , springs ,top-out mod
  • Moriwaki rearsets
  • Carbon Airbox heatshielding custom K&N panel filter
  • Power Commander USB
  • Galfer superbike full foating rotors - SS braided lines
  • Brembo 19 RCS Adjustable Ratio Radial Brake Master Cylinder
  • DID 520 gold chain
  • CRG folding clutch lever
  • Relocated battery Shortened wiring harness
  • Flapper PAIR EVAP removed
  • Soft Rev limiter removed
  • 15/41 gears 520
  • Vortex clip-ons

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post #2 of 3 (permalink) Old 08-05-2011, 10:56 PM
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The manual calls for 10W. I use this weight. If you travel and carry loads like passengers and luggage, 15W will do too. Glad to see you taking care of a mostly neglected part of the bike.

I use Maxima products....no issues.
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Last edited by madbuyer; 08-05-2011 at 11:28 PM.
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post #3 of 3 (permalink) Old 08-05-2011, 11:24 PM
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The OEM oil used in the forks is Pro Honda Suspension SS-8.

This fork oil is 10wt with a viscosity rating of 39.7 cSt at 40 Deg C. and 7.6 cSt at 100 Deg C.
Most OEM cartridge forks come with 10wt fork oil.

The OEM fork oil amount for SP2 forks is 498cc +/- 2cc, and a fork oil height of 135mm to the top of the outer fork tube, with spring out, fork fully compressed, and cartridge bled of any air.
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