Triumphrat

lightning · 02-07-2007, 11:54 AM

Redoing my front forks this week. Any recommendations on fork oil?

McQueen · 02-07-2007, 03:31 PM

Which bike?

On both my '79 and '04, I run 20wt fork oil. I have progressives in the '79, stock springs in the '04 (though that will change soon).

In the '79, I had 30wt oil with the progressive springs, but didn't like it. Drained it and went with 20wt.

lightning · 02-07-2007, 04:25 PM

on the Thruxton, installing the Works dual rates. Isnt 20 a little thick?

[ This message was edited by: lightning on 2007-02-07 14:28 ]

McQueen · 02-07-2007, 04:32 PM

20wt works great in my bonnie black.

I guess I'll see when I put progressives in, but I don't think it's too heavy. 30wt is labeled as "heavy duty."

Sheepdog · 02-09-2007, 05:04 PM

With the heavier Ikon front springs, my T100 works very responsively with the stock (10wt) fork oil. With the stock springs, I can see why the 20 wt would improve control...the original springs are pretty marginal in the performance department. Apart from my 1960 BMW (that had an Earles front end) and some small-bore Hondas, this is the first bike I've had with 12" long fork springs (the spacers are as long as the springs). The Ikons are full length, progressively wound, and handle big hits much better. For someone who has just bought a Bonnie, or someone with a stock machine, I would suggest that improved fork springs are an essential modification. Do it before any other mod...the stock springs are that bad.

lightning · 02-09-2007, 10:36 PM

Quote:

On 2007-02-09 15:04, Sheepdog wrote:
With the heavier Ikon front springs, my T100 works very responsively with the stock (10wt) fork oil. With the stock springs, I can see why the 20 wt would improve control...the original springs are pretty marginal in the performance department. Apart from my 1960 BMW (that had an Earles front end) and some small-bore Hondas, this is the first bike I've had with 12" long fork springs (the spacers are as long as the springs). The Ikons are full length, progressively wound, and handle big hits much better. For someone who has just bought a Bonnie, or someone with a stock machine, I would suggest that improved fork springs are an essential modification. Do it before any other mod...the stock springs are that bad.

I have a set of Works Dual rates going in. I wound up going with 10 as well once I found out what the stock weight was. Now if someone knows what level of fork oil to put in these things I will be set.