Fork oil - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 6 Old 03-25-2015, 11:01 AM Thread Starter
Join Date: Mar 2015
Location: Florence,Al.
Posts: 13
Fork oil

This KLR that I am working on needs fork seals. I have looked at the how to on here about replacing them and know I can do that. The only thing I am not sure of is the weight oil I should use. This is for a 240lb rider. Can some give me a clue about what would be the correct weight oil?
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post #2 of 6 Old 03-25-2015, 11:31 AM
2nd Gear
Join Date: Apr 2013
Location: Woodridge, IL
Posts: 120
I'm 200 and I keep using bel-ray 10wt which I believe has the recomemended characteristics. I don't really do much off road so I doubt I personally need anything different.

A thinner oil will feel softer (compress more easily) and rebound more quickly, so it really depends a lot on what you use the bike for and what type of response you want from your suspension.

You could probably try something different during your rebuild. If you decided you didn't like it, you could probably change oil without pulling them off again. I haven't done it that way yet myself but I ill try it next time.
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post #3 of 6 Old 03-25-2015, 02:54 PM
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Location: Fort Sask , Alberta, Canada
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Kawasaki's spec is 10wt, 188 -192 mm from top.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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post #4 of 6 Old 03-26-2015, 12:01 AM
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Join Date: Oct 2013
Location: Chilliwack, BC, Canada
Posts: 1,481
I always start with ATF unless the owner has identified the ideal oil for their riding. Nice part about ATF is that it's inexpensive so if it's not ideal it provides a flush. Most people find it's about right. ATF has good EP and lubricity.
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post #5 of 6 Old 03-26-2015, 09:08 AM
1st Gear
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Join Date: Aug 2013
Location: Uxbridge, Ontario
Posts: 50
I'm about 240 lbs. I'm happy with 15wt. I did install heavier fork springs.
FYI, Kawasaki is specifying a 5mm higher level on the NE.
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post #6 of 6 Old 03-26-2015, 06:16 PM Thread Starter
Join Date: Mar 2015
Location: Florence,Al.
Posts: 13
I just want to thank everyone for the help. I wound up using 15wt and it is doing good for my weight. If anyone has an early Honda GL they need some help on please PM me and I will do what I can to help.

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