Street Triple R - fork oil - Triumph Forum: Triumph Rat Motorcycle Forums
Street Triple Forum Owners and Enthusiasts of the Triumph Street Triple.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 05-12-2011, 10:15 AM Thread Starter
Production 125
Main Motorcycle: Street Triple R
New Member
 
Join Date: May 2011
Location: France
Posts: 7
Question Street Triple R - fork oil

Hi,

I will change the oil on my fork (2 years old), and according to the service manual, the recommanded oil is 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

Have you use that grade in yours ?

Thanks
oliviers3r is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 05-12-2011, 10:43 AM
World SuperBike
Main Motorcycle: 2010 Triumph STR
Senior Member
 
Join Date: Nov 2010
Location: Canada
Posts: 1,827
Other Motorcycle: N/A
Extra Motorcycle: Cannondale Freeride MTB
My Haynes manual says Kayaba KHL 15-10 or equivalent 5W fork oil. The owner's manual for my R says the fork oil does not need to be changed until 40,000 kms. I would say as long as the seals are not leaking and the fork is working fine just leave it alone until you reach that mileage, then change both the seals and oil. If a seal fails before this mileage then do the seal/oil change at this time. Stick with factory specs unless you have special racing conditions. Today's fork oils, bushings and seals are far better than days of old and are fairly maintenance free. - Wayne
Wayne's Striple is offline  
post #3 of 7 (permalink) Old 05-12-2011, 11:18 AM Thread Starter
Production 125
Main Motorcycle: Street Triple R
New Member
 
Join Date: May 2011
Location: France
Posts: 7
What is strange is that Kayaba KHL 15-10 is not 5W equivalent on the charts...

I will change the springs so i will change the oil at the same time

You're right, on mt owner's manual it's 50,000 or 5 years...!!!
It seems a lot when you see the dirt in the oil with less mileage...

@+
oliviers3r is offline  
 
post #4 of 7 (permalink) Old 05-13-2011, 01:54 AM
Site Supporter
Team Owner
Main Motorcycle: Street Triple R
Super Bananarator
 
MacBandit's Avatar
 
Join Date: Sep 2008
Location: Seattle area
Posts: 4,576
Other Motorcycle: 97 Honda CR250R
Extra Motorcycle: 96 BMW K1100RS
It's 5wt.
MacBandit is offline  
post #5 of 7 (permalink) Old 05-13-2011, 11:05 AM Thread Starter
Production 125
Main Motorcycle: Street Triple R
New Member
 
Join Date: May 2011
Location: France
Posts: 7
Hi,

Did you take a look at the charts ?
Because they don't tell that...

I was just curious to know if someone used 2.5wt

Thanks
oliviers3r is offline  
post #6 of 7 (permalink) Old 05-13-2011, 11:15 PM
Site Supporter
Team Owner
Main Motorcycle: Street Triple R
Super Bananarator
 
MacBandit's Avatar
 
Join Date: Sep 2008
Location: Seattle area
Posts: 4,576
Other Motorcycle: 97 Honda CR250R
Extra Motorcycle: 96 BMW K1100RS
No I did not bother to look at the charts. I know that is 5wt because that is what it is. I work on these bikes everyday.

What you are looking at is a cross-reference. In other words the OEM oil cross references to x brands 2.5wt. This does not mean that the OEM oil is 2.5wt. It simply means that brand Xs corresponding oil is 2.5wt. Fork oil is a funny thing in that different brands wt rating does not necessary correspond to another brands wt rating. It's not as stringently regulated as engine oil and as such it varies.
MacBandit is offline  
post #7 of 7 (permalink) Old 05-14-2011, 03:09 PM Thread Starter
Production 125
Main Motorcycle: Street Triple R
New Member
 
Join Date: May 2011
Location: France
Posts: 7
Hi MacBandit,

Quote:
Originally Posted by MacBandit View Post
What you are looking at is a cross-reference. In other words the OEM oil cross references to x brands 2.5wt. This does not mean that the OEM oil is 2.5wt. It simply means that brand Xs corresponding oil is 2.5wt. Fork oil is a funny thing in that different brands wt rating does not necessary correspond to another brands wt rating. It's not as stringently regulated as engine oil and as such it varies.
Yes i agree with you, i discovered on the charts that the SAE Oil Weight was different from one brand to another, and sometimes the difference is important.
In fact, i was looking at the oils that were available in my local shop, which are motul and motorex, and in both case, their own SAE Oil Weight grade best matching the OEM oil viscosity is 2.5w (motorex racing fork oil 2.5w and motul factory line very light)...

Quote:
Originally Posted by MacBandit View Post
No I did not bother to look at the charts. I know that is 5wt because that is what it is. I work on these bikes everyday.
It's not absolutely true anymore to say it's a 5w, because as you said, it's really dependent on brand, whatever the grade.
It's for example amazing to see that castrol 10w is lighter than some 2.5w...
So i guess that with the oil brand you are using, it matches 5w.

To conclude i will say that i will not rely anymore on the SAE Oil Weight, but only on the real viscosity of the oil !

A nice wiki page on the subject, for people interested :
Suspension fluid wiki

Thanks

@+
oliviers3r is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options
All posts must adhere to Forum Rules

Register Now



In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Suspension/Fork, brake upgrade for Street Triple to make it like the 'R' TriumphSmitty Street Triple Forum 2 01-25-2016 03:24 PM
New Rider Interested in Street Triple or Street Triple R JoshF Street Triple Forum 44 11-06-2009 04:11 PM
Triumph Launches the Street Triple as in STREET Triple! Aussiebikerdave The Rocket Science Forum 1 05-25-2007 08:20 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome