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Author Topic: 86 YZ250 Fork Oil  (Read 1791 times)

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Offline Davey Crocket

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86 YZ250 Fork Oil
« on: July 28, 2012, 12:06:09 pm »
Does anybody know how much and what grade of fork oil for a 86 YZ 250....it's for a fa fa fa fast rider (obviously not me)....cheers in advance.
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crankpin

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Re: 86 YZ250 Fork Oil
« Reply #1 on: July 28, 2012, 07:40:14 pm »

I'd try 15wt 160mm from the top of the tube with springs out and forks collapsed.
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Offline evo550

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Re: 86 YZ250 Fork Oil
« Reply #2 on: July 28, 2012, 09:51:17 pm »
You might need to consider spring rate first, oil height really only has an effect on the last few inches of travel.
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IT400C

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Re: 86 YZ250 Fork Oil
« Reply #3 on: July 28, 2012, 10:12:17 pm »
564cc of 15wt, 160mm from top is std.
190mm from top min oil,
140 from top maximum oil.

Just realised I have a YZ250S workshop manual here.  I'll drop it over tomorrow if u want...
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Offline Davey Crocket

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Re: 86 YZ250 Fork Oil
« Reply #4 on: July 28, 2012, 10:36:13 pm »
Good on yer fellas....
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Offline holeshot buddy

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Re: 86 YZ250 Fork Oil
« Reply #5 on: July 28, 2012, 10:58:43 pm »
4.5 springs 15 weight 130mm from top ;)
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