Subtanks

All Boinger, Sub-Tank, Steering Stabilizer Stuff Here.
Post Reply
User avatar
MojoScojo
Posts: 1796
Joined: June 8th, 2007, 8:42 pm
Location: Rathdrum Idaho

Subtanks

Post by MojoScojo »

Yo Bob, how about some close up pics of your subtanks. Looking at the idea of making my own.
No longer have a CR500.
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
User avatar
AlisoBob
"Hoon-father"
Posts: 15404
Joined: May 31st, 2007, 6:39 pm
Location: Aliso Viejo Ca

Post by AlisoBob »

In all honesty, the basic function is to allow the forks to bleed off some air pressure on the smaller hits, yet on big hits to cancel this function... and use the trapped air to assist the fork springs to prevent bottoming out.

The tanks only really serve two purposes...

1. Return CLEAN air to the forks.

2. Return escaped OIL to the forks.

If you were to plumb your forks to your handlebars, you would be placing your "Tank" above the fork.... this is good for drainback!

The handle bars dont need to be air tight, just plugged enough to keep the dirt out.


This is my system: $100 on Ebay.
http://www.framebreakerracing.com/New_F ... _Info.html

Image
For very little money, you could make a fixed orifice , free backflow unit that offers 90% of what the big dollar system offer.

Maybe even contact these guys, tell them you got their system, and just want extra valves cuz your a "Pro" racer.

http://www.tgtracing.com/

There is NO DOUBT in my mind that subtanks improve small bump feel, without sacrificing G-out, or big bump bottoming resistance.

I dont think its a complicated as the companies what you to believe it is however...





:wink:
User avatar
MojoScojo
Posts: 1796
Joined: June 8th, 2007, 8:42 pm
Location: Rathdrum Idaho

Post by MojoScojo »

Ed Zachary. Please please please, some close ups of the elbow fittings.
No longer have a CR500.
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
User avatar
AlisoBob
"Hoon-father"
Posts: 15404
Joined: May 31st, 2007, 6:39 pm
Location: Aliso Viejo Ca

Post by AlisoBob »

Image

Here is the flow control valve. The schematic shows a adjustable flow in one direction, and freeflowing return.

I have always ran them full open... why?

Image

Heres the fork fitting, pretty small orifice.. its uses the stock bleed screw hole.

I bottom once in a while ( which is a good thing) so it must flow some air. This set up provides a real ice ride.

Notice the plastic tubing. Ive seen them with expensive, HEAVY, steelbraided lines.. Just how much pressure do you think builds up in one of these systems? Plastic tubing, and "push" connections have worked flawlessly.
User avatar
MojoScojo
Posts: 1796
Joined: June 8th, 2007, 8:42 pm
Location: Rathdrum Idaho

Post by MojoScojo »

Thanks Bob!
No longer have a CR500.
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
Post Reply