Fork oil level - Triumph Forum: Triumph Rat Motorcycle Forums
Trophy Trophy 3 & 4 - for all 900 and 1200cc models 1991- 2004

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 06-21-2013, 04:58 AM Thread Starter
Senior Member
Grand Prix 500
 
Join Date: Aug 2004
Location: Upminster, Essex, UK
Posts: 107
Fork oil level

OK, FINALLY got my fork seals sorted and after reading posts on this forum, decided to insert a 3/4 inch spacer and fill the forks to 125mm below top of forks (compressed)
Struggled like crazy to insert the spacers and finally gave up and used just the standard triumph one. However, forgot to drain some oil out of the forks before putting them back together. The forks seem pretty damn stiff now, but is this just because they are rebuilt with new seals/oil or is it because the air gap is wrong?
Simon
'97 900cc trophy, Showa forks.

Ooops, forgot, I've also used 15w fork oil which is thicker so I guess that may be contributing....

Last edited by simonjrwinter; 06-21-2013 at 05:03 AM.
simonjrwinter is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 06-22-2013, 01:22 AM
Senior Member
SuperSport
Main Motorcycle: 2001 Trophy 1200, T509
 
Join Date: Jul 2011
Location: NH USA
Posts: 1,343
Other Motorcycle: Norton Commando MK 3
Extra Motorcycle: 1968 BSA Thunderbolt
15w fork oil would't be too heavy, book calls for 10w20 so 15 seems right there, and new seals definately would have nothing to do with increased stiffness. My factory manual is showing an air gap of 133mm for Showa equipped Trophys though. Too high a fluid level will stiffen up the fork action.
rubber biscuit is offline  
post #3 of 4 (permalink) Old 06-22-2013, 06:17 AM
Senior Member
Formula Extreme
Main Motorcycle: Rebuilt 1993 Trophy 900
 
alexibrow's Avatar
 
Join Date: Dec 2012
Location: Worthing, UK
Posts: 830
The 15w oil is contributing if factory spec is 10w; however, RB is right in that a smaller air gap also stiffens things up. It's likely to be a combination of the two "modifications".

Bear in mind that as well as stiffening the forks, thicker oil slows down the bound and rebound, so the forks are slower to react to changes in the road surface.

Sent from Motorcycle.com App
alexibrow is offline  
post #4 of 4 (permalink) Old 06-22-2013, 11:05 AM
Senior Member
Grand Prix 500
Main Motorcycle: Triumph Trophy 1200 94
 
henwilv's Avatar
 
Join Date: Jun 2010
Location: Near Basel, CH.
Posts: 118
Other Motorcycle: 1200 Trophy 96, Laverdas
Extra Motorcycle: Honda 750 F2 82
stiffening up the fork a bit doesn't sound like a bad idea to me, it's pretty soft in std. trim
henwilv is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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
Fork oil level recommendations.Progressive Fork Spring installation SST Cruisers - America, Speedmaster 2 05-17-2012 01:00 PM
Fork Oil and Oil Level for Race Tech Spring StreetTripleDan Twins Technical Talk 3 03-07-2012 05:00 PM
Fork oil level rf9rider T3 Sport / Touring Forum 8 08-09-2010 10:55 AM
fork oil level delrazor Classic, Vintage & Veteran 10 07-14-2009 07:08 AM
Fork Oil - Increasing viscosity and oil level? NikosR Sprint Forum 9 04-21-2007 04:12 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