F3 rear shock - ZX6R Forum
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post #1 of 8 Old 10-02-2016, 05:59 AM Thread Starter
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F3 rear shock

Hi everyone.

I need a new rear shock for my f3. It's making a hissing noise and is way too soft. Problem is, I can find used G and J shocks and a couple of F that look poor with high miles. I can only seem to find aftermarket very expensive replacements.

The bike only cost me £500 and is only to get me experience until I can afford a new model.

Would you recommend fitting a good used G or J shock or fit a new one?

Thanks in advance.


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post #2 of 8 Old 10-02-2016, 06:22 AM
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There should be the parts compatibility thread, which should have a spread sheet in it that will list what will fit where. I'd think that any sport bike with a similar rising rate linkage, which moves the swing arm a similar distance should have a shock and spring which will be close to what is needed.

If you are hearing that shock hissing, obviously the seals are gone.... that should be affecting how the shock works, but it should not be what makes the shock feel 'soft'. The springs at either end of the bike carry the weight of the rider, and the bike. All the damping does is alter how fast the movement of the shock is, with respect to sudden changes caused by the road.

If the springs are correct, and the damping is totally shot, it should still feel okay standing still, then be bouncy while riding. If the bike sags well into the suspension's range of motion when you sit on the bike..... the springs are too soft. Odds are good, the suspension is in need of a rebuild, to make it right. Over time, water will get in and contaminate the oil in the fork and shock. That will dilute the fluid and hose up the damping.

You may be better off finding a local shop and asking them to inspect the suspension. Obviously the shock is bad -- the cheaper alternative may be to have it rebuilt, rather than replaced. If you could do that and at the same time fit a proper spring, you would be far better off than buying a random part with an unknown history.
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post #3 of 8 Old 10-02-2016, 06:44 AM Thread Starter
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Quote:
Originally Posted by RJ2112 View Post
There should be the parts compatibility thread, which should have a spread sheet in it that will list what will fit where. I'd think that any sport bike with a similar rising rate linkage, which moves the swing arm a similar distance should have a shock and spring which will be close to what is needed.



If you are hearing that shock hissing, obviously the seals are gone.... that should be affecting how the shock works, but it should not be what makes the shock feel 'soft'. The springs at either end of the bike carry the weight of the rider, and the bike. All the damping does is alter how fast the movement of the shock is, with respect to sudden changes caused by the road.



If the springs are correct, and the damping is totally shot, it should still feel okay standing still, then be bouncy while riding. If the bike sags well into the suspension's range of motion when you sit on the bike..... the springs are too soft. Odds are good, the suspension is in need of a rebuild, to make it right. Over time, water will get in and contaminate the oil in the fork and shock. That will dilute the fluid and hose up the damping.



You may be better off finding a local shop and asking them to inspect the suspension. Obviously the shock is bad -- the cheaper alternative may be to have it rebuilt, rather than replaced. If you could do that and at the same time fit a proper spring, you would be far better off than buying a random part with an unknown history.


I'm going to rebuild the front forks over winter as I feel that they need doing.

Is rebuilding the rear shock something I can do or specialist only?



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post #4 of 8 Old 10-02-2016, 06:53 AM
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I believe it really depends on whether the shock was constructed in a way that allows it to be rebuilt. Any high end after market shock can be rebuilt. OEM is more hit or miss, I believe.

TBH, I don't do suspension work.... hasn't come up enough to bedevil me to the point where i have had to learn it. My FZ6 was very poorly suspended. I had the fork rebuilt and the damping modified. We tossed the OEM shock in the garbage and fitted an Ohlins unit. New springs and valving up front, the correct spring and completely adjustable suspension on the rear -- the difference was unbelievable. So much better. I didn't know the fork was so bad, because of how much worse the rear was.

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #5 of 8 Old 10-02-2016, 11:43 AM
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i fitted a 2006 shock to my j ,its slightly shorter witch lowers the bike but packing washers can sort that ,the 2007 2008 shock also fits,also the 2004 b1h shock will go as well
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post #6 of 8 Old 10-02-2016, 01:40 PM Thread Starter
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Originally Posted by scoot33 View Post
i fitted a 2006 shock to my j ,its slightly shorter witch lowers the bike but packing washers can sort that ,the 2007 2008 shock also fits,also the 2004 b1h shock will go as well


So, I know the J shock will fit with minor modifications to the battery tray etc. I could, in theory, fit a 2006 to my 97 with a packing block which I can machine from solid bar at work.


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post #7 of 8 Old 10-04-2016, 12:01 PM
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yeh basically,,if the 06 fits mine ,and you know the j fits yours with a few mods it would fit
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post #8 of 8 Old 10-04-2016, 12:01 PM Thread Starter
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Has anyone used brook suspension? They offer a rebuild starting at £119 and the same for the forks.


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