Quote:Sad day orry:

 

 

 

Cheer up Cliff, I fell down the stairs this morning - proper flying lesson - managed to move the radiator, crash into the porch door and give my left foot (Daniel Day-Lewis wot?), a good ol mangling too. Survival of the fattest :rotflmmfao: Having comiserative/compensatory  :cake eating:  delivered tomorrow

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i'd try a fork seal saver afore pulling the forks apart as ya may be able to swipe out a tiny piece of dirt.  I prefer 15 weight fork oil.

Quote:Also best oil from experiences for forks?

Quote:Kin hell mate, bet you're sore as f**k today. GWS buddy. :giveusahug:

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I'm still trialing a mixture. 30W in the left leg and transmission fluid in the right.

You can adjust the behaviour of each leg independently with the top adjusters, the 30W adds more rebound damping at any setting which I find beneficial. I've managed to adjust both legs to give a similar feel to the Ohlins at the back, because there's no unnecessary bouncing when  going on/off the front brake

Quote:Limped all the way to the boozer

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why transmission fluid Chris?

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It's an old favourite of bike shops from 'ye good old days' , Honda specified it as standard for their earlier forks.

 

It's produced to an exacting specification, so unlike 10W fork oil, which has a wide variety of viscosities depending on each manufacturer, ATF is more consistent.between batches. It's also seal friendly and resists foaming well. ATF usually has a viscosity of 34Cst, which is about the same as Silkolene 10W

 

I've used it in both fork legs but thought it was still too light for me,so I thought I would try one leg with a very heavy oil which has a viscosity (cSt) of about 70.

 

The extra viscosity in that one leg reduces front end rebound quite a lot. I notice it when coming off the brakes after heavy braking, with thinner oil the front end popped straight up, but with the heavier oil it feels more controlled. The adjuster valve is set to one click from the least resistance setting so it doesn't give too much compression damping. The leg with ATF mostly controls the compression damping with the help of the 30W leg. The fork leg with ATF is set to one click from firmest setting.

 

This might be a setup which works for me due to my heavy weight , 18 stone fully dressed, so it isn't necessarily a formula which works for everyone.

 

I thought i would try it after riding the KTM for a bit, where one leg controls rebound and the other controls compression.

If I mixed the oils then I wouldn't have the very heavy 30W providing good rebound resistance

 

 

 

Here's a list of some fork oils, you can see that between manufacturers, '5W' fork oil can have a range of viscosities, one manufacturers 5W can have the same viscosity as another manufacturers 10W. http://www.mediaturbo.com/clients/marzocchi/forkoilviscosity.html and here... http://www.dynojet.co.za/wp-content/uploads/2019/08/Fork-oil.pdf

 

 

Standard Dexron 3 ATF has a viscosity of 34.1 (Esso Dexron 3 is 37) , Mobil 1 ATF is 34.0 , I think 34 is in the target ranget for ATF, but older 'Type F' ATF has a cSt of 38.1

 

Honda standard 10W fork oil has a viscosity of 35

 

Castrol 10W fork oil has a viscosity of 15

 

Elf Moto Fork Oil 10W has a viscosity of 47 !!!

 

 

 

 

I've read pages of testimony from people using ATF still today, no problems are reported but it isn't considered the best when using cartridge forks for some reason, but our older damper design is appropriate for ATF

 

Obviously you can replace the ATF with a 10W or 15W fork oil if you were to try a split oil weight setup

Quote: "what does the new bike give me that my niner doesn't?"

When considering this, the advantages are very few in actual fact.