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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through January 07, 2010 » Fork oil choices. « Previous Next »

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Cataract2
Posted on Monday, January 04, 2010 - 11:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Was wondering, what does everyone use for fork oil on their 1125?
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Arcticcr
Posted on Monday, January 04, 2010 - 11:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I used Motul fork oil on both the forks and the shock for my track bike. Granted, it's not an 1125 (XB9R). However, both the XBs and 1125s forks are made by Showa.
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Cataract2
Posted on Tuesday, January 05, 2010 - 12:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

How much does run you in comparison to the HD stuff?
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Kevin_stevens
Posted on Tuesday, January 05, 2010 - 12:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What weight? I don't know how to convert from the Harley-spec stuff in the manual.

KeS
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Cataract2
Posted on Tuesday, January 05, 2010 - 07:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Kevin, that's a good question. I forgot to ask that last night.
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Jdugger
Posted on Tuesday, January 05, 2010 - 08:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I use the Race Tech oil. It's lighter weight as a general rule, but it's super slippery and gives the suspension travel a silky feel.

I run it with the Showa 25MM race fork cartridge kit with a smile on my face!

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Family_buells
Posted on Tuesday, January 05, 2010 - 08:38 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I wouldn't go just by the viscosity on the label because the actual viscosities vary widely from brand to brand and even types within brands. Also the viscosity index is important for consistent performance as the oil temperature increases. Basically the higher the viscosity index, the more consistent the viscosity.
What I do is find a particular oil that works and always use it in that set of forks.
Here's an oil comparison chart that really helps you see which brand and type of oils work the best: http://www.mediaturbo.com/clients/marzocchi/forkoi lviscosity.html
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Thefleshrocket
Posted on Tuesday, January 05, 2010 - 10:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Family_buells, I've seen a similar chart with fork oil actual viscosity vs. rated viscosity. The Suzuki LO1 is listed as being 15wt, but in reality it's really thin--around 2.5wt if memory serves. The Suzuki SV1000 comes with LO1 oil and many people drain it and replace it with thicker oil. I used Maxum 10wt in my SV and the fork was much firmer than with the stock oil.
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Family_buells
Posted on Wednesday, January 06, 2010 - 08:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Usually, the thinner the oil, the better, because the oil viscosity will not normally change much so your damping characteristics stay more stable with an increase in temperature. Of course that's IF your damping adjustment range can handle it. Also, each increment of damping adjustment will have less effect as the oil viscosity increases.
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