Front Fork Oil Weight?

Old N' Grumpy

Living Legend
Joined
Aug 8, 2015
Messages
3,696
Location
Ft.Lauderdale, Florida
Ride
2014 Triumph R3R & 2005 Harley FatBoy
I am replacing my Roadsters front springs and rear shocks with Progressives. After looking in the owners manual and doing a search (albeit fast) I cannot find the stock front shock oil weight which is what Progressive calls for. Help please.
 

rocketjohn

Top Fuel
Joined
May 28, 2016
Messages
1,934
Location
Roanoke, VA
Ride
was a 2013 Triumph Rocket 3 Touring
My book calls for 0 wt albeit a Touring bike. For a Roadster, I think 5wt or even a tad heavier would be better.
 

rocketjohn

Top Fuel
Joined
May 28, 2016
Messages
1,934
Location
Roanoke, VA
Ride
was a 2013 Triumph Rocket 3 Touring
You have some flexibility in choosing, depending on how you want to tune the ride. My Intruder had 10 wt from the factory and I had to put 20 wt in it to keep the fork from bouncing like a pogo stick.
 

Jeffrey Cochran

.060 Over
Joined
Apr 30, 2015
Messages
113
Location
Phx, AZ
Ride
Triumph Scrambler, Aprilia Tuono , Husaberg , R3Classic
When I added Progressive springs to my forks I used 7wt fork oil, if my old and feeble memory serves me right stock was 5wt. This is on a 08 Classic . Just as important is the fluid level !
 

Jeffrey Cochran

.060 Over
Joined
Apr 30, 2015
Messages
113
Location
Phx, AZ
Ride
Triumph Scrambler, Aprilia Tuono , Husaberg , R3Classic
Had some time today so looked it up ,

"The oil level specified for Rocket III forks is 89 mm from the upper surface of the fork outer tube, with the fork fUlly compressed. "

"Fill the fork with SAE 5w (or Kayaba KHL15-10 fork oil until the oil level is slightly above the recommended level. Alternatively add 667cc of oil if filling a completely empty fork. "

Hope that helps
 

Ishrub

Retired and loving it!
Joined
Feb 18, 2016
Messages
6,906
Location
Duffy, Canberra, ACT, AUSTRALIA
Ride
R3 Roadster,Sprint ST 1050 ABS, BMW R100RS sidecar
My suspension specialist used a 10w but I forgot to ask the brand. :whitstling::(

When I was researching I found that the nominal wt in 'w' is pretty useless as all brands vary in actual viscosity. So finally check for the oil with best match to specs for Kayaba KHL15-10 fork oil and go from there up or down for weight/ride preferance.

Comparative Oil Weights Table - Transmoto
Buying the right oil for your bike is very important as it can effect performance and the amount of wear-and-tear your bike receives. So what oil should you use in your suspension? Most suspension units use approximately a 5Wt (SAE). But, due to the international SAE standard being so loose, one oil company’s 5Wt can be the same viscosity as another’s 7.5Wt.

Here’s a really nerdy table that uses the much tighter Centistoke (Cst) testing scale, so we can compare brands with accuracy. Want to know more about oils, suspension components and your options? Check out www.teknikmotorsport.com
Some more re Street Triple R fork-oil which uses same KHL 15-10 (KAWASAKI KHL-15-10 cSt @ 40C = 15.3 )

KHL 15-10
After "googling" it, that's what i found :
comparative oil weight
motul fork oil blend chart
it seems to be grade 2.5W, which is very light
Street Triple R - fork oil - Triumph Forum: Triumph Rat Motorcycle Forums
 
Last edited:
Similar threads





Top
AdBlock Detected

We get it, advertisements are annoying!

Ad-blocking software does a great job at blocking ads, but it also blocks some useful and important features of R3Owners. For the best possible site experience please take a moment to disable your AdBlocker for R3Owners.Net.

I've Disabled AdBlock