Hi,
Find a good shop that knows about suspensions and talk with them about anything you want to know... Talk with them about the springs that your MC28 is eqiupted now and ask them if they are ok for your weight...
Its a pain in the ass here as there are not many good suspension shops here, even the good ones have bad rep with MC28's cuz they dont know how to rebuilb them, i dont know why too..
buy an aftermarket unit or find one that is roughly equivalent.
eg the CBR600f4i shock is an almost good swap, got a good spring rate, about 10mm longer, just need to sort out the reservoir hose issue and it'll be in my bike
Matt: What pressure is needed to gas a shock up to? Wegot a workshop at work where I can do it, but I don't know what pressure.
kyocrane: rebuilding front forks is easy, I'm in the process of doing that now, I just want to source some bushings. I can take photos of it if you want.
Rear shock 10 bar. That's about 145psi. Please be very aware that a gas under pressure can kill you!
Having said that, the first time I rebuilt a so-called non-rebuilable rear shock I was all togged up with leather apron, face shield etc etc and got a very disappointing pop when I drilled through the end cap to release the gas. High pressure but relatively small volume.
When rebuilding you must make absolutely sure that there's no air bubbles. When I'm pumping the damper rod through the fluid I give it a few sharp cracks with a brass mallet to 'shock' the air bubbles out of the damper valve.
You will spill oil all over the floor. Not just once. Then you'll pull the damper rod up too high, suck air in and have to start again. Be prepared to overflow the oil just to make sure there's no air pockets hiding.
The nitrogen is contained in a rubber bladder in the reservoir tank. I like to fit this all deflated so that there's essentially too much oil in the shock. Then I set one of the banjo bolts on the hole at a high point and let any remaining air bubbles settle at this high point. Tapping the shock body helps release any sneaky bubbles that are hiding.
Oh yeah, forgot to say that you'll need to fit a valve to the reservoir tank cap so that you can refill the gas. There's a couple of types generally used. Either a schrader valve, which is the same as the one you see on your tyres, or a rubber bung type. The latter requires a hypodermic needle to refill, whereas the schrader can use a normal airline fitting that you can buy anywhere.
Alright, I totally forgot to get a photographer whilst I was doing my fork rebuild, but this is a great guide to use, the forks are almost identical, just remember to measure the correct oil height for the forks you are working on, and to write down your settings before you start undoing things!
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