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EXinMB
11-12-2010, 09:37 PM
just wondering if anyone can give me directions or a link on how to rebuild a stock 400ex rear shock and 450r front shocks. i know mostly how to do it but some details would help. also what do i need to rebuld just seals and oil?

also does anyone know what size piston gives a 416 i have a 440 and i wanna build a 416 but i dunno what size piston i need.

headache
11-14-2010, 04:04 PM
a 2mm overbore makes a 416. 3mm makes a 426. You've got to have nitrogen to recharge the shocks with when you are done. Most shocks run between 150-250psi of nitrogen pressure in them..

trailrider894
11-16-2010, 01:22 PM
Just making sure you know that you will either need a new jug or get your cylinder re-sleeved to the stock size then bored and honed to the correct piston size for the 416.

duroc825
11-19-2010, 07:06 PM
http://www.racetech.com/page.aspx?id=63&menuid=71

Somewhere on their site I found info on do it yourself. Sorry I can't be more specific.