HP4 in a YZ450

2 replies to this topic
  • danyz450

Posted July 15, 2005 - 01:25 PM


Please don't flame me,
I've done many search(s) and I can't see if anyone is using HP4 sae10w-40 SJ without Moly (the gold synt bottle) in there 450's.

I normally used maxima 20-50 (I ran out and can't get it local) but both Yamaha dealers (Yama, Honda, Suz). in town said use HP4 gold.

I've run HP4 in my street bike without any issues. :applause:

Thanks :eek:

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  • grayracer513

Posted July 15, 2005 - 02:13 PM


If you are talking about Honda's HP4, they make two; one is a JASO MA oil and the other an MB oil. The MA is OK to use. Never use an MB. They are friction modified, and too slippery for wet clutches.

  • danyz450

Posted July 15, 2005 - 02:39 PM


Gray bottle, they said NEVER use this. I assume that's your MB.

Gold bottle, this is the synt and what they recommended. I checked and it's MA like you said.:eek:

Black bottle, they said it was like the gold but not synt.

Thanks for the post, makes me feel better. :applause:

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