Specialized rear shock "Brain" rebuild with pictures & now forks too

[stirk]

Further progress tonight with bleeding, now running on my hand dyno with no noises. We have arrived I believe. Might get it onto the bike tomorrow night.

:woot:

Nice one, I love your test rig, very clever indeed.

 

[link1896]

Link, this is an epic thread, I would have burnt the thing by now. Looking forward to you taking it for a ride.

Lets hope I don't get stuck miles from home with a failed o ring and end up in fuckwits thread.

:woot:

Nice one, I love your test rig, very clever indeed.

crude but it works. Puts bleed port at the heighest point.

 

[link1896]

Didn't fit to bike, wasn't happy with bleed, so tried again.

Learnt brain fade setting must be in fully soft position to allow air to get out from between inertia assembly and IFP, and to not cycle shock when under a vacuum, one or more orings let air in, can only cycle when at atmospheric or pressurised.

 

[link1896]

On the bike and working :cheer2::cheer2::cheer2::cheer2::kiss::kiss::kiss::kiss:

 

[link1896]

IFP pressure of 150psi feels good.

 

[slowmick]

Congratulations on your success :thumb:

 

[link1896]

Congratulations on your success :thumb:

Thank you sir, I do feel accomplished. It's been a long journey. Hopefully the fork cartridge isn't as time consuming.

 

[nzdans]

Great work Link, thanks for having us along for the journey :thumb:

 

[hifiandmtb]

Remove the reflector!

 

[cramhobart]

Congratulations on your success :thumb:

This^^^^- I'm in awe of your skills and patience

 

[link1896]

Remove the reflector!

I ride at night too much to be without them.

 

[Miguel75]

Congrats on completing an excellent journey and for sharing the details.

I too have suffered reflector induced harassment, stay strong (and visible).

 

[link1896]

Congrats on completing an excellent journey and for sharing the details.

I too have suffered reflector induced harassment, stay strong (and visible).

Thanks. It's a long running game with hifiandmtb. If I ever rebuild his fork for him I think I might hot glue a dozen reflectors to it

 

[stirk]

Thanks. It's a long running game with hifiandmtb. If I ever rebuild his fork for him I think I might hot glue a dozen reflectors to it

Well done on the rebuild, me thinks you may get busy from here on!

I have a few reflectors if you need em for future fork rebuilds..

 

[link1896]

250 psi for the IFP feels more like a new shock should. I've had a ride around the neighbourhood, now to do a full lap of Lysterfield. If anyone sees an epic being pushed and not ridden, stop and say hi.

repsol 10wt mineral oil 46@40c, 8@100c feels good.

 

[MARKL]

Awesome effort Link. :clap2::clap2::clap2:much respect.

 

[link1896]

Awesome effort Link. :clap2::clap2::clap2:much respect.

Thank you sir.

 

[link1896]

250 psi for the IFP feels more like a new shock should. I've had a ride around the neighbourhood, now to do a full lap of Lysterfield. If anyone sees an epic being pushed and not ridden, stop and say hi.

repsol 10wt mineral oil 46@40c, 8@100c feels good.

made it to lysterfield, did a full lap and home, no dramas.

Compression damping has been reduced, bottomed out over the usual drop offs with the same air pressure in the air Spring ( as set by the auto sag, 220 psi). Maybe shock isn't shimmed for Fox green 47/11.7. Will find a higher viscosity oil.

IPF pressure sets the brain fade threshold, 250psi is brutal, like running 45psi in the rear tyre. 200psi is a nice compromise.

 

[rider124]

Awesome stuff man! glad you got it on the bike and working!
Was cool to follow the thread and dream!

I have heard the brain cartridge in the fork isnt as time consuming, as long as you know what you are doing! so good luck!

 

[link1896]

Awesome stuff man! glad you got it on the bike and working!
Was cool to follow the thread and dream!

I have heard the brain cartridge in the fork isnt as time consuming, as long as you know what you are doing! so good luck!

Fork cartridge does look easier but I still need to make shaft clamps to clamp it in the vice and undo assemblies. I've drawings showing IFP depth and pressure so no guessing, and I have a nitrogen needle, plus the full rebuild video is available on Vimeo. Hoping to get started early in the am on it, already in bed, I'm stuffed.