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Classic Bike Trackdays

Fork oil

 
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firebladeaid



Joined: 15 Sep 2012
Posts: 30
Location: NOTTINGHAM
PostPosted: Sat Oct 20, 2012 5:01 pm    Post subject: Fork oil Reply with quote
Anyone have any idea of capacity for my 3MA
it has 41mm dia forks

was considering 15w at 400 -450cc
what you think?
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yanw



Joined: 25 Jun 2011
Posts: 176
Location: Gloucester
PostPosted: Sat Oct 20, 2012 8:00 pm    Post subject: Reply with quote
The USD forks (3ma4-5) are 326ml 10W 190mm from top of collapsed leg (329ml 10w 180mm for the SP) http://www.pure-2-stroke-spirit.info/download/3MA/3MA3-4-5_workshop_manual_jp.pdf (section 5.1)

The conventional forks on the 3ma1 are 425ml 5w 150mm from the top of the leg http://www.pure-2-stroke-spirit.info/download/3MA/3MA1_workshop_manual_jp.pdf (section 7.23)

If you are a Japanese "Rocket boy on track" then 5w/10w oil is probably OK. If you are a fat European then 15w or 20w might see you bottoming out less.

TZR manuals and ting: http://www.pure-2-stroke-spirit.info/ They have spring length limits etc as well.

TZR forum (unless you are watching this on Dave then they will have probably moved shop again) http://www.pure2strokespirit.net/forums/
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Howie



Joined: 18 Oct 2009
Posts: 511
Location: Kwaksville
PostPosted: Sat Oct 20, 2012 11:42 pm    Post subject: Reply with quote
Quote:
If you are a Japanese "Rocket boy on track" then 5w/10w oil is probably OK. If you are a fat European then 15w or 20w might see you bottoming out less.


Laughing Laughing Laughing

Well that has dispelled all the myths of suspension set up for me, first class yanw, thank you Laughing
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firebladeaid



Joined: 15 Sep 2012
Posts: 30
Location: NOTTINGHAM
PostPosted: Thu Oct 25, 2012 5:32 pm    Post subject: Reply with quote
Thanks for that Yanw.......... bit in the middle 15st but 1min 48 round cadwell full circuit Smile
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