Overhauling Mk3 forks

andrew19
Site Supporter
Site Supporter
Reactions:
Posts: 121
Joined: 02 Oct 2011, 23:07
Bike Owned: 250 MK3
Location: Swansea
Overhauling Mk3 forks

Post by andrew19 » 17 Dec 2012, 22:07

I have searched FAQ but so far not been able to find an answer so would be grateful for advice.

Which side up should the large steel washer (for want of a better word) which is situated above the oil seal be fitted? One face is machined flat and the other appears to be slightly bevelled. Unfortunately it was fitted differently in each fork so taking note during disassembly has not helped :( :(

User avatar
knackeredMk1
Super Moderator
Super Moderator
Reactions:
Posts: 4184
Joined: 03 Nov 2006, 17:41
Bike Owned: Modified Mk1
Re: Overhauling Mk3 forks

Post by knackeredMk1 » 17 Dec 2012, 22:43

Don't believe it matters.

fallenmikethebike
NWAA Supporter
NWAA Supporter
Reactions:
Posts: 3520
Joined: 02 Dec 2007, 16:02
Bike Owned: MK3
Location: Mid Surrey
Re: Overhauling Mk3 forks

Post by fallenmikethebike » 18 Dec 2012, 16:38

+1, It's a scraper ring for catching burrs.
Mike
VFORCE REEDS-MUGEN HEAD AND BARREL-WHITE POWER-ALL ON MY WISH LIST!!

andrew19
Site Supporter
Site Supporter
Reactions:
Posts: 121
Joined: 02 Oct 2011, 23:07
Bike Owned: 250 MK3
Location: Swansea
Re: Overhauling Mk3 forks

Post by andrew19 » 18 Dec 2012, 22:33

Thanks. Received bushes and oil and dust seals from Leisure Trail today so will put back together this weekend. I'm going to try 10wt oil.

fallenmikethebike
NWAA Supporter
NWAA Supporter
Reactions:
Posts: 3520
Joined: 02 Dec 2007, 16:02
Bike Owned: MK3
Location: Mid Surrey
Re: Overhauling Mk3 forks

Post by fallenmikethebike » 19 Dec 2012, 17:47

10 wt will make the damping firmer, but the rebound will be slower.
Mike
VFORCE REEDS-MUGEN HEAD AND BARREL-WHITE POWER-ALL ON MY WISH LIST!!

andrew19
Site Supporter
Site Supporter
Reactions:
Posts: 121
Joined: 02 Oct 2011, 23:07
Bike Owned: 250 MK3
Location: Swansea
Re: Overhauling Mk3 forks

Post by andrew19 » 19 Dec 2012, 22:13

FMTB

I weigh about 80kg kitted up. Are you suggesting I should use 5w? I won't be doing any jumps just "sedate" green laning :D

fallenmikethebike
NWAA Supporter
NWAA Supporter
Reactions:
Posts: 3520
Joined: 02 Dec 2007, 16:02
Bike Owned: MK3
Location: Mid Surrey
Re: Overhauling Mk3 forks

Post by fallenmikethebike » 19 Dec 2012, 22:20

I usually use a cocktail of the those two mixed, giving a 7.5, but I believe that weight is now available straight of the shelf.
PS, I'm about the same body mass, but would up the oil weight for any more exuberant riding.
Mike
VFORCE REEDS-MUGEN HEAD AND BARREL-WHITE POWER-ALL ON MY WISH LIST!!

andrew19
Site Supporter
Site Supporter
Reactions:
Posts: 121
Joined: 02 Oct 2011, 23:07
Bike Owned: 250 MK3
Location: Swansea
Re: Overhauling Mk3 forks

Post by andrew19 » 20 Dec 2012, 21:59

Motol do a 7.5 and I can obtain from M&P for £15 a litre.

Not sure about too "exuberant" rides at my age (60+) :)

fallenmikethebike
NWAA Supporter
NWAA Supporter
Reactions:
Posts: 3520
Joined: 02 Dec 2007, 16:02
Bike Owned: MK3
Location: Mid Surrey
Re: Overhauling Mk3 forks

Post by fallenmikethebike » 20 Dec 2012, 22:26

;) Evergreen, 60's the new 50's now :lol: .
Mike
VFORCE REEDS-MUGEN HEAD AND BARREL-WHITE POWER-ALL ON MY WISH LIST!!

User avatar
jompy
Forum Ghost
Forum Ghost
Reactions:
Posts: 493
Joined: 03 Jul 2012, 19:55
Bike Owned: MK2
Location: Derby
Re: Overhauling Mk3 forks

Post by jompy » 23 Dec 2012, 14:06

[quote="fallenmikethebike"];) Evergreen, 60's the new 50's now :lol: .
Mike[/quote]

i bleedin hope so :P

fallenmikethebike
NWAA Supporter
NWAA Supporter
Reactions:
Posts: 3520
Joined: 02 Dec 2007, 16:02
Bike Owned: MK3
Location: Mid Surrey
Re: Overhauling Mk3 forks

Post by fallenmikethebike » 23 Dec 2012, 14:14

jompy wrote:
fallenmikethebike wrote:;) Evergreen, 60's the new 50's now :lol: .
Mike
i bleedin hope so :P
I think it's a case of having to be, what with all our pensions shot to buggery, austerity ridden Britain, and having to get those bankers bonuses back on track, I don't see retirement coming around quite as soon as many of us envisaged.
Mike
VFORCE REEDS-MUGEN HEAD AND BARREL-WHITE POWER-ALL ON MY WISH LIST!!

andrew19
Site Supporter
Site Supporter
Reactions:
Posts: 121
Joined: 02 Oct 2011, 23:07
Bike Owned: 250 MK3
Location: Swansea
Re: Overhauling Mk3 forks

Post by andrew19 » 23 Dec 2012, 22:48

Well, I bought the 10w in the end so it will have to be "exuberant" rides. :lol:

Actually the fact that the 10w was 60% of the price of the 7.5w was what swung it.

What came out of the forks seemed a lot more viscous than the 10w so should still be a plush ride -- I hope!

Eddie Evans
2016NWAA
2016NWAA
Reactions:
Posts: 461
Joined: 15 Aug 2007, 19:05
Bike Owned: MK3
Location: N Wales
Re: Overhauling Mk3 forks

Post by Eddie Evans » 23 Dec 2012, 23:45

On a trials web site it was saying that ATF was equivalent to 7 wt fork oi and a lot cheaper.
I buy ATF for about £15 for 5 liters and use it as gearbox oil. Now I'll be using it as fork oil in the trials bike but the CRM(fitted with XR650R forks) and enduro bikes will still be getting 5wt fork oil because I prefer the handling with the lighter oil.

fallenmikethebike
NWAA Supporter
NWAA Supporter
Reactions:
Posts: 3520
Joined: 02 Dec 2007, 16:02
Bike Owned: MK3
Location: Mid Surrey
Re: Overhauling Mk3 forks

Post by fallenmikethebike » 24 Dec 2012, 08:56

Eddie Evans wrote:On a trials web site it was saying that ATF was equivalent to 7 wt fork oi and a lot cheaper.
I buy ATF for about £15 for 5 liters and use it as gearbox oil. Now I'll be using it as fork oil in the trials bike but the CRM(fitted with XR650R forks) and enduro bikes will still be getting 5wt fork oil because I prefer the handling with the lighter oil.
+1 Yep, I've had no problems using it for that purpose either, and as Eddie says, being that cheap, replacement times can be shortened to keep that just done feel.
Mike
VFORCE REEDS-MUGEN HEAD AND BARREL-WHITE POWER-ALL ON MY WISH LIST!!

andrew19
Site Supporter
Site Supporter
Reactions:
Posts: 121
Joined: 02 Oct 2011, 23:07
Bike Owned: 250 MK3
Location: Swansea
Re: Overhauling Mk3 forks

Post by andrew19 » 01 Jan 2013, 15:02

Got the bike MOT'd yesterday. Must say the forks are great after the refurb. :)

Will be trying ATF for transmission oil once I've changed the gear selector shaft oil seal. Is this a seal that has to be bought from LT?

I've not managed to find a seal number/size in FAQ. I will check for numbers on the seal when I remove the old one though.


Post Reply