purpose of small and large screw at top of ST1100 rear shock

[aSTerix]

I was wondering what is the purpose of the small screw and large screw that are on opposite sides of the top of the rear shock

The large screw has been 'staked' into place so I'm guessing related to the chrome shaft being secured somehow (first photo)

The small screw turns about 3 turns anticlockwise then stops (second photo)

 

[DeanR]

Small screw is rebound damping adjustment.

 

[aSTerix]

Small screw is rebound damping adjustment.

Which direction (clockwise or anti-clockwise) is more rebound damping ? thx

 

[Tony]

I think if you turn it right ) right tighty ) then the shock gets harder and if you turn it left ) lefty loosey) then it gets softer. Have you ever heard that saying before over there in Dubai?

 

[aSTerix]

Which direction (clockwise or anti-clockwise) is more rebound damping ? thx

I found this elsewhere :

Rebound Damping adjustment:

The rebound damping adjuster has four adjustment positions. To adjust to the standard position, proceed as follows:


Turn the adjuster clockwise until it stops.
Turn the adjuster counterclockwise 1 turn (model equipped with CBS/ABS/TCS: 1/2 turn) to align the punch mark on the adjuster with the reference mark.

Recommended adjuster positions:

Rider	Cargo	REBOUND DAMPING Turn clockwise from standard position	Preload
1	NO	0° (no adjustment)	1 or 2
1	YES	180° (1/2 turn)	3
2	NO	270° (3/4 turn)	4
2	YES	270° or 360° (3/4 to 1 full turn)	5

For model equipped with CBS/ABS/TCS:

Rider	Cargo	REBOUND DAMPING Turn clockwise from standard position	Preload
1	NO	0° (no adjustment)	1 or 2
1	YES	0° (no adjustment)	3
2	NO	90° (1/4 turn)	4
2	YES	90° or 180° (1/4 to 1/2 turn)	5

 

[Tony]

See I was right ....clockwise is right!!!

 

[aSTerix]

I think if you turn it right ) right tighty ) then the shock gets harder and if you turn it left ) lefty loosey) then it gets softer. Have you ever heard that saying before over there in Dubai?

I think a saying like that over here could get me put in jail !!

 

[Tony]

lol thats funny. No the saying is " righty tighty , lefty loosey" thats it

 

[TerryS]

AFAIK the screw ends in a tapered point, which then bears down on a needle which adjusts the damper orifice size within the damper piston/shaft. It is a good idea to turn the adjuster occasionally to prevent it seizing. My 1100 shock was OK but a similar set-up on my VFR800 did seize; on that one, the shock was inverted so the adjuster was at the low end and exposed to a lot more crud.

 

[mortenk]

Interesting. Why the different damping settings based on load? I understand why one would want to change pre-load when adding a passenger, but damping? On my FJR I have electronic suspension, and I always change pre-load based 1 or 2-up. I change damping independently based on road conditions: rough roads = SOFT, twisties = HARD, regardless of pre-load and MC loading. I am confused (it happens, don't worry )

 

[mortenk]

The rebound damping adjuster has four adjustment positions. To adjust to the standard position, proceed as follows:

Recommended adjuster positions:

Rider	Cargo	REBOUND DAMPING Turn clockwise from standard position	Preload
1	NO	0° (no adjustment)	1 or 2
1	YES	180° (1/2 turn)	3
2	NO	270° (3/4 turn)	4
2	YES	270° or 360° (3/4 to 1 full turn)	5

For model equipped with CBS/ABS/TCS:

Rider	Cargo	REBOUND DAMPING Turn clockwise from standard position	Preload
1	NO	0° (no adjustment)	1 or 2
1	YES	0° (no adjustment)	3
2	NO	90° (1/4 turn)	4
2	YES	90° or 180° (1/4 to 1/2 turn)	5

I actually see five rebound settings here: 0, 90, 180, 270, and 360, so the description isn't very good.

 

[ST Gui]

I actually see five rebound settings here: 0, 90, 180, 270, and 360, so the description isn't very good.

For 99.9% of the population 0 = Off and most people don't count that as a setting. Sort of as saying a heat controller has five settings - Off and four different heat settings when most would consider Off/no heat as not being a setting. The description is more than adequate for anybody capable of thinking outside of a binary mode.

 

[mortenk]

For 99.9% of the population 0 = Off and most people don't count that as a setting. Sort of as saying a heat controller has five settings - Off and four different heat settings when most would consider Off/no heat as not being a setting. The description is more than adequate for anybody capable of thinking outside of a binary mode.

I see your point, but in this case 0 is not OFF, it is the standard position...so essentially the most commonly used setting. Discarding it as a setting altogether just seems wrong to me. But I'm a mathematician, so tend to focus on stuff like this

 

[ST Gui]

Discarding it as a setting altogether just seems wrong to me. But I'm a mathematician, so tend to focus on stuff like this

I wondered about that.