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#139493 - 12/02/17 12:38 AM Re: fork oil height vs volume? [Re: justin_lewis]
grewen Offline
Junior Member

Registered: 08/10/17
Posts: 29
Loc: armstrong bc canada
hey Justin I don't know the measurement of the seal, but if you google Fort Nine motorcycle in Canada and check, they sell seals and dust scrapers for your bike for about $24. they will most likely ship down to you
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greg 1998 yamaha xt225, 2018 Suzuki dr650 , 2016 Yamaha bolt, 1981 Honda ct110, 1973 Honda ct90

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#139497 - 12/02/17 01:12 AM Re: fork oil height vs volume? [Re: grewen]
#brer15 Offline
Member L1
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Registered: 10/03/16
Posts: 139
Loc: Atlanta,GA
If an imp oz = .961 us oz, then I'm on board with the US oz is the big one.
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2004 XT225 purchased new in October 2004 0 miles. Current miles over 26,000.

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#139498 - 12/02/17 02:39 AM Re: fork oil height vs volume? [Re: grewen]
patuca Offline
Bronze Member
*****

Registered: 08/18/12
Posts: 524
Loc: Cranbrook BC Canada
Hi Gerwen:

Here's my take:

I can't see a mistake in the manual regarding the ounce conversion...the US fluid ounce IS bigger than the Imperial ounce as Muniac has described.

It's true that an Imperial Gallon is bigger than a US Gallon, but that doesn't count for ounces in a totally different system....

If you take ONE Imperial ounce and pour it into a measuring vial that measures US ounces, it will only come up to .961 ounces which is LESS than one US ounce. That must mean there is LESS fluid in an Imperial ounce.

One Imperial ounce is about .961 of one US ounce or,
1.0 US fluid ounce = 1.04084 Imperial fluid ounce.

I'm not sure of your measurements on your fork tube and I'm having trouble imagining a fork tube with a smaller outside diameter fitting the fork clamps on one side of the same bike? Is the clamp modified? How are you measuring the tube?

Maybe a picture would help.

patuca
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#139501 - 12/02/17 03:56 AM Re: fork oil height vs volume? [Re: grewen]
grewen Offline
Junior Member

Registered: 08/10/17
Posts: 29
Loc: armstrong bc canada
the inner part of the fork measures the same, both sides so the clamps at the triple are fine. now I do not know how, but the outer (lower) measures smaller on the outside and because it take less oil, I am assuming it must be smaller on the inside also.

now back to the weird Oz.... if 1 Imp oz is = to .961 US oz, then .961 is a number that is less than 1, so the imperial oz is bigger. you can't have the Imperial gallon being bigger than the US gallon and have the parts that make up the gallon being the opposite
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greg 1998 yamaha xt225, 2018 Suzuki dr650 , 2016 Yamaha bolt, 1981 Honda ct110, 1973 Honda ct90

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#139502 - 12/02/17 04:02 AM Re: fork oil height vs volume? [Re: grewen]
grewen Offline
Junior Member

Registered: 08/10/17
Posts: 29
Loc: armstrong bc canada
ok...I just looked it up on the interweb. it seems the imperial measurement uses 40 oz to the ? and the US uses 32 oz to the ? so that makes the US oz bigger. who would have thought, makes no sense to me
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greg 1998 yamaha xt225, 2018 Suzuki dr650 , 2016 Yamaha bolt, 1981 Honda ct110, 1973 Honda ct90

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#139507 - 12/02/17 05:26 PM Re: fork oil height vs volume? [Re: grewen]
Muniac Offline


Platinum Member
*****

Registered: 01/16/04
Posts: 5088
Loc: Montrose, CO
No offense taken. Just trying to sort through the details in a helpful way. I do think the manual is correct. When I filled my forks I did so with 12 oz of fork oil. Just used the kitchen's 1 cup and 1/2 cup measuring cups.

I too was under the impression an Imperial gallon is a larger volume than a US gallon. But then a nickel is bigger than a dime. Sorry for any confusion and/or ill-conceived analysis.
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#139509 - 12/02/17 06:22 PM Re: fork oil height vs volume? [Re: grewen]
grewen Offline
Junior Member

Registered: 08/10/17
Posts: 29
Loc: armstrong bc canada
I can't believe I managed to get to 67 years and never knew that the oz were that different. so since we don't really know if a measuring cup sold in Canada is actually in imperial oz or us oz, I guess the only safe way to measure anything is to use the mm scale. and yes I was wrong about the manual and it was right.but...I know the imperial gallon is larger than the US gallon and that is why we get so much better gas mileage than you guys. awe.. this whole thing has been kind of fun


Edited by grewen (12/02/17 06:25 PM)
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greg 1998 yamaha xt225, 2018 Suzuki dr650 , 2016 Yamaha bolt, 1981 Honda ct110, 1973 Honda ct90

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#139514 - 12/02/17 07:37 PM Re: fork oil height vs volume? [Re: grewen]
Muniac Offline


Platinum Member
*****

Registered: 01/16/04
Posts: 5088
Loc: Montrose, CO
Yes it has been fun. And that's why we ride and visit here. And whence it ceases to be fun, probably time to retreat. The metric system is good but I didn't grow up with it. Used it in school all the time. Watching the skiing last night and the downhillers go 135 Km/hr. Means nothing to me. Now 80 MPH I can relate too. Glad you enjoyed the thread and it measured out OK.
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