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Post by richard on Aug 31, 2021 18:59:00 GMT
hello
after buying the bike recently the seller told me that he had fitted new forks seals, and also replaced the oil, but having looked at some of the other jobs he had done, i wanted piece of mind so decided to check/replace the oil myself
on removing the forks this afternoon, the fluid that came out was white, i re-filled them with 140cc ATF oil but they feel a bit soft and squishy, is there any issue with adding a tad more ATF oil, or am i better replacing the 140cc with a heavier oil
the spring length was approx 495mm long
thanks richard
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Post by BritPete on Sept 1, 2021 8:48:57 GMT
I have ATF in my 400 and it seems fine to me
Would probably use Fork oil when I run out of ATF
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Post by buster on Sept 1, 2021 9:35:20 GMT
I used this stuff from silvers in the 'thing' seems ok but that bikes on the early (non progressive) springs so they tend to be a bit pogo stick  |
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Post by johnfcbn44dx on Sept 1, 2021 12:33:50 GMT
The originals have red ATF in them, I normally 50/50 mix 10w/15w fork oil, but 10w is ok....
New springs are just over 500mm, with a service limit of 490mm.
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Post by johnfcbn44dx on Sept 1, 2021 16:58:21 GMT
hello
after buying the bike recently the seller told me that he had fitted new forks seals, and also replaced the oil, but having looked at some of the other jobs he had done, i wanted piece of mind so decided to check/replace the oil myself
on removing the forks this afternoon, the fluid that came out was white, i re-filled them with 140cc ATF oil but they feel a bit soft and squishy, is there any issue with adding a tad more ATF oil, or am i better replacing the 140cc with a heavier oil
the spring length was approx 495mm long
thanks richard
By "white", was it emulsified? |
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Post by richard on Sept 1, 2021 17:40:32 GMT
hello
after buying the bike recently the seller told me that he had fitted new forks seals, and also replaced the oil, but having looked at some of the other jobs he had done, i wanted piece of mind so decided to check/replace the oil myself
on removing the forks this afternoon, the fluid that came out was white, i re-filled them with 140cc ATF oil but they feel a bit soft and squishy, is there any issue with adding a tad more ATF oil, or am i better replacing the 140cc with a heavier oil
the spring length was approx 495mm long
thanks richard
By "white", was it emulsified? hello
no it wasnt emulsified, just " clear oil " not exactly white, the seller said he had replaced the seals recently
thanks richard
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Post by richard on Sept 16, 2021 5:39:40 GMT
hello
whilst mooching through the workshop manual recently i noticed that from 1981 the fork oil cc was increased from 140cc to 190cc per leg..
so that being said, what changed in the previous 3 years to warrant the 50cc increase, both the 79 and 81 models share the same spring ?
just curious really..
thanks
richard
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Post by johnfcbn44dx on Sept 16, 2021 7:22:52 GMT
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Post by richard on Sept 16, 2021 17:59:22 GMT
hello
yes ok, i knew about the bushes etc, but was curious about the increase to the oil capacity
unfortunately i cant access the links you provided [ says i dont have permission ]
thanks richard
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Post by comstar on Sept 16, 2021 18:04:19 GMT
Same here John just tried and says none of us have permission.
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Post by comstar on Sept 16, 2021 18:11:19 GMT
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Post by johnfcbn44dx on Sept 16, 2021 21:03:27 GMT
hello
yes ok, i knew about the bushes etc, but was curious about the increase to the oil capacity
unfortunately i cant access the links you provided [ says i dont have permission ]
thanks richard
The increase in the volume of the later fork case and the end of the later stanchion having slightly less volume are the only reasons I know of.....for the extra 50ml. |
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Post by johnfcbn44dx on Sept 16, 2021 21:18:57 GMT
At thread level I cannot see any options to restrict or un-restrict who sees the thread, so not something that I can fix??? Something must have changed somewhere, as they have been viewed 200+ Found how to the sticky and lock, but otherwise I'm stuck  |
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Post by McLellan on Sept 17, 2021 5:59:33 GMT
John / Nick / Richard,
I think I’ve worked it out. John, the links you put up for Richard have the forum https//: address missing at the start of them that’s all therefore the forum thinks you are not logged on and therefore asks for you to log in (so you get permission).
Just access John’s links through the Fork Information thread section John created Richard.
Hope this makes sense chappies.
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Post by andy1kenobe on Sept 17, 2021 6:20:31 GMT
John / Nick / Richard, I think I’ve worked it out. John, the links you put up for Richard have the forum https//: address missing at the start of them that’s all therefore the forum thinks you are not logged on and therefore asks for you to log in (so you get permission). Just access John’s links through the Fork Information thread section John created Richard. Hope this makes sense chappies. When I click the links, it does come up saying I don't have permission and I can see I'm not logged in. Logging in opens up the forum to me. |
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