996mick Posted February 17, 2008 Report Share Posted February 17, 2008 hell just wondering what weight fork oil they put in 2001 txt280 from standard.i am about 13.5 stone.cheers Quote Link to comment Share on other sites More sharing options...
jse Posted February 17, 2008 Report Share Posted February 17, 2008 hell just wondering what weight fork oil they put in 2001 txt280 from standard.i am about 13.5 stone.cheers 300cc's of 5 weight fork oil per leg. If you have problems with bottoming, you can add a little more to raise the fork oil level. Oil level has an effect on the last third of fork travel, but you may want to add some preload to the forks to start with with bottoming out symptoms. Jon Quote Link to comment Share on other sites More sharing options...
996mick Posted February 17, 2008 Author Report Share Posted February 17, 2008 cheers for that jon Quote Link to comment Share on other sites More sharing options...
farmerj Posted February 15, 2015 Report Share Posted February 15, 2015 (edited) Jon, Old topic, but how about fork oil level for the same bike? (mine is a 2001 txt 321) Thanks, Jeff Edited February 15, 2015 by farmerj Quote Link to comment Share on other sites More sharing options...
biffsgasgas Posted February 15, 2015 Report Share Posted February 15, 2015 Its the same. 300cc per side. --Biff Quote Link to comment Share on other sites More sharing options...
farmerj Posted February 16, 2015 Report Share Posted February 16, 2015 Thanks Biff, I was wondering about measurement from top of slider (vs. replacement volume)? I've read 100mm, but also 160 in the newer forks... An example of the question here, http://www.trialscentral.com/forums/topic/34074-09-gas-gas-pro-fork-oil/ ...but specs for the older forks are not referenced; I don't think the '01s had aluminum Marzocchis. Quote Link to comment Share on other sites More sharing options...
biffsgasgas Posted February 16, 2015 Report Share Posted February 16, 2015 A very wise man and TC poster here has a great explanation of why fork level measurement would be better than volume. You can use either or. Experience says 300 however i have used as little as 250 to get my bounce on. Here is the website where he explains this. http://www.gasgas.com/Pages/Technical/trials-suspension-tips.html Here are his valuable words "Setting fork oil level by actual measurement rather than volume is more accurate. If your service manual doesn’t give a fork oil level but just the c.c. measurement here’s a way to find out. Flush the forks with kerosene or mineral spirits ( DON’T use gasoline ) and let them drain. Add the c.c. amount called for, compress the fork tube ( spring removed ) and measure from the top of the tube to the oil. A narrow metric ruler works best. You can experiment with more or less of a level to get the action you like. 5 mm changes in oil level will make a change that is noticeable but don’t raise it too high as the forks will hydraulic lock and possibly blow a fork seal. 10 to 15 mm should be a limit in most trials forks. Increases in fork oil level mostly affects the last third of travel." Quote Link to comment Share on other sites More sharing options...
farmerj Posted February 17, 2015 Report Share Posted February 17, 2015 That makes sense, either/or and use oil volume to set a baseline for future oil level measurements. Thanks Biff! Quote Link to comment Share on other sites More sharing options...
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