Showa’s new Big Piston Fork

**JD Racing** · 30th October 2008, 19:42

A picture of the fork internals from the intermot show.

Click image for larger version.

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**cowpoos** · 30th October 2008, 19:58

Originally Posted by JD Racing

A picture of the fork internals from the intermot show.

is that the compression piston halfway up the fork leg?? the oil level must be prety high in that case?

**JD Racing** · 30th October 2008, 20:10

It's one big combined compression and rebound piston, I don't know if they've hard chromed the inside of the stanchions but if they haven't it's going to contaminate the oil really quickly. Whenever you run a powered brush down the inside of a stanchion black slurry always comes out.

**cowpoos** · 30th October 2008, 20:25

Originally Posted by JD Racing

It's one big combined compression and rebound piston, I don't know if they've hard chromed the inside of the stanchions but if they haven't it's going to contaminate the oil really quickly. Whenever you run a powered brush down the inside of a stanchion black slurry always comes out.

how does this compare to factory showa kit?? is this similar or close to what they are using in kit forks? or?

**JD Racing** · 31st October 2008, 21:24

I don't know about the kit that drops in standard forks, but it is used in the full superbike forks.

**Shaun** · 1st November 2008, 16:13

Originally Posted by cowpoos

is that the compression piston halfway up the fork leg?? the oil level must be prety high in that case?

You are enjoyig it R you not mate

**Robert Taylor** · 4th November 2008, 08:27

Originally Posted by JD Racing

I don't know about the kit that drops in standard forks, but it is used in the full superbike forks.

It would be interesting to see how they allow for friction and bind up relative to fork deflection, especially under braking.

**cowpoos** · 4th November 2008, 18:53

Originally Posted by Robert Taylor

It would be interesting to see how they allow for friction and bind up relative to fork deflection, especially under braking.

I'm more interested in the high oil levels that they would have to run..and how that woul react to the theoretical air spring...and or if the levels arn't high enough to damp and high speeds/high lean angles. or is the oil held higher in the fork and contained within a crtain area?

**Robert Taylor** · 4th November 2008, 19:46

Originally Posted by cowpoos

I'm more interested in the high oil levels that they would have to run..and how that woul react to the theoretical air spring...and or if the levels arn't high enough to damp and high speeds/high lean angles. or is the oil held higher in the fork and contained within a crtain area?

Youll have to be patient then wont you....Point of fact deflection friction is a much bigger issue than many casual observers realise.

**cowpoos** · 4th November 2008, 20:28

Originally Posted by Robert Taylor

Youll have to be patient then wont you....Point of fact deflection friction is a much bigger issue than many casual observers realise.

having the pistons that high would help reduce the fork deflection friction would it not...a few thou deflection after 30mm down could eaily turn to mm's near the bottom?

**AllanB** · 4th November 2008, 20:42

Piece of crap sport bike fork - this guy knows how to build a front end.

**Robert Taylor** · 5th November 2008, 07:26

Originally Posted by cowpoos

having the pistons that high would help reduce the fork deflection friction would it not...a few thou deflection after 30mm down could eaily turn to mm's near the bottom?

Id beg to differ given where the main bending moment of defelection is. But why in fairness dont we all stop speculating until we have more info and indeed the hardware at our disposal.