3000psi and falling
Zone Head
Posts: 848
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posted April 26, 2012 04:08 PM
Time for a Fork oil change
Im thinking its time to change the fork oil, my bike is an 08 with 24k miles on it, its at 67" and has a re valved rear shock with a race tech spring that works well with the extension.
Ive done a few fork seal and bushing jobs, but never been in a zx14's fork.
All i want to do is a fluid change, is it as simple as pulling the fork, removing the cap and dumping it out and re-filling with a measured amount?
Also anyone have a oil weight recomendation? Im about 190 suited, 67" wb. I feel as the stock oil is a bit to thin since I extended the bike.
Ive got the shop manual, but id feel better after hereing from a experienced fork guy before I start.
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08 ZX14, 2010 Persimmon Red bodywork.
Flies pulled, 16-42, BMC street, 8" extensions, drag shock, cut pan, Cycle Concepts Drag Pack and springs, muzzy m14 w/ oval can, lowered, Shinco usoft rear, pcv with autotune, leightweight Shori 18ah battery, throttle meister. 500lbs at bandimeres scales with half tank of juice.
  
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zixxer14
Pro
Damn that was Quick
Posts: 1233
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posted April 26, 2012 09:18 PM
We need pics when you do it. I'm sure mine could benefit from some new oil also. Always nice if there's vid/pics as the manual skips so much info.
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3000psi and falling
Zone Head
Posts: 848
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posted April 26, 2012 11:53 PM
Ill do that, I just finished studying the manual and it looks just like every other fork ive worked on before so nothing new. Ill take a few pics and do a wright up on this. I think most guys could do this with a home made or 30.00 ebay spring tool.
The only thing I need to figure out is what weight oil to use. Stock is 5w but being that my bike is at 67" and im no lightweight (195lbs) im thinking 7.5 or 10w. Any input guys?
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08 ZX14, 2010 Persimmon Red bodywork.
Flies pulled, 16-42, BMC street, 8" extensions, drag shock, cut pan, Cycle Concepts Drag Pack and springs, muzzy m14 w/ oval can, lowered, Shinco usoft rear, pcv with autotune, leightweight Shori 18ah battery, throttle meister. 500lbs at bandimeres scales with half tank of juice.
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TH1RT3EN
Zone Head
Trial And Error Control
Posts: 722
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posted April 27, 2012 02:41 AM
From what i know from a few drag builders They use 20w shock oil when they cut down the forks on their applications. I would say 10w would be a good choice for a stretched application with a 150+ lb rider with stock legnth forks.
Maybe there is someone else who has done this job to their 14.
Just figured i would chime in with what i know...
HTH
Patrick
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There is a fine line between Fear and Respect
When I was a kid i used to........... Wait I Still Do That!
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3000psi and falling
Zone Head
Posts: 848
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posted April 27, 2012 07:38 AM
Thanks for the input, I just located some amsoil fork oil here on the island, im going to pick 2qts up in a few. Its 10wt. Ill be doing this today.
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08 ZX14, 2010 Persimmon Red bodywork.
Flies pulled, 16-42, BMC street, 8" extensions, drag shock, cut pan, Cycle Concepts Drag Pack and springs, muzzy m14 w/ oval can, lowered, Shinco usoft rear, pcv with autotune, leightweight Shori 18ah battery, throttle meister. 500lbs at bandimeres scales with half tank of juice.
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riteristrob
Expert Class
Posts: 109
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posted April 27, 2012 12:50 PM
On my ZX12R I poured the fork oil out into a clean pan, then pumped the fork up and down a few times to get it all out, let the fork sit in the pan upside down over night then measured precisely the amount that came out. Then refilled the fork with the same amount of oil. Worked great.
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3000psi and falling
Zone Head
Posts: 848
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posted April 27, 2012 01:27 PM
So you didnt remove the retainer and spring? Im removing the first fork now...
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08 ZX14, 2010 Persimmon Red bodywork.
Flies pulled, 16-42, BMC street, 8" extensions, drag shock, cut pan, Cycle Concepts Drag Pack and springs, muzzy m14 w/ oval can, lowered, Shinco usoft rear, pcv with autotune, leightweight Shori 18ah battery, throttle meister. 500lbs at bandimeres scales with half tank of juice.
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3000psi and falling
Zone Head
Posts: 848
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posted April 27, 2012 03:26 PM
Well Icant seem to compress the spring far enough to get to the nut to remove the retainer assembly myself. So i carefully drained the shock oil into a fuel mixxer bottle that has measuring marks on it. I drained 460ml out of each leg and replaced with 465 ml. Im sure this will be fine this time, but I wouldnt do this a secont time as the levels could become to far out of wack this way after a time or to.
Next time ill have a friend here to help compress the spring or get or make a threaded rod style compressor.
____________
08 ZX14, 2010 Persimmon Red bodywork.
Flies pulled, 16-42, BMC street, 8" extensions, drag shock, cut pan, Cycle Concepts Drag Pack and springs, muzzy m14 w/ oval can, lowered, Shinco usoft rear, pcv with autotune, leightweight Shori 18ah battery, throttle meister. 500lbs at bandimeres scales with half tank of juice.
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