KDX betor rear shock

[isle of man kmx]

Hi
I recently purchased a Betor rear shock and spring for my bike.(ebay)
Although my bike is a kmx the shock fits perfectly.
The problem i have is when i have the bike stood on the ground it doesnt bounce back up correctly.The best way to describe it is that i push down on the seat and the bike comes back up in slow motion!!
The Shock is one that cant be opened for servicing but does have a schrader type valve for putting Nitrogen in.
One other thing when the bike is on its stand i can pull the back wheel up and it bounces back down perfectly.

I think someone has let the nitrogen out.
What do you think?

Many thanks for reading
John

[Matt-]

Post a picture up of your shock so we can have a look

Matt
____________________
RIP jack (wheelie king), you will never be forgotten.
Current Bike's - Road Legal TZR 125 Pitbike, Aprilia SR50R 2010

[Budgetboy]

It could be that the nitrogen has come out or leaked over time ,,or that the bladder is leaking itself. Add to this that the oil in the shock might be like frothy milk due to years of use..

Show us a pic of the said item..
____________________
www.Mailorderrepairs.co.uk We service your Carburetor's, Calipers & Suspension for less Also Bike repairs undertaken.

[Vincent]

Have you used the correct mounting bolts/bushes?
____________________
Space Is Deep

[Budgetboy]

Also make sure your linkages are all lubed up and not sticking as this will also cause the same symptoms.

Id check this and what vincent has said first..
____________________
www.Mailorderrepairs.co.uk We service your Carburetor's, Calipers & Suspension for less Also Bike repairs undertaken.

[isle of man kmx]

Thanks for the replies.
The shock is on the bike using the correct bolts etc which are only finger tight at the moment. The linkage is all lubed and moves freely/

[lihp]

Is the shock adjustable? Since it was never designed for use on your bike, the rebound damping may be too much. If you can, reduce rebound damping and try again.

[isle of man kmx]

Hi
Ive got the shock off the bike and removed the spring.
I can compress the shock quite easily by hand but it is quite a struggle to extend it again.I have to hold it in a vice and use both hands to pull it out.
There is nothing leaking anywhere..

[dangerousdave]

does sound like there is too much rebound damping.

are there any adjusters on the shock at all ?

did you buy it secondhand then off eBay? If so if no joy with above can you go back to the seller and ask what the solution to it is?
____________________
1988 Kawasaki KMX 200

Previous: Yamaha YZF1000, ZZR600, KMX200, DT50, KX80, CG125, PF50

[isle of man kmx]

There is no adjustment at all on this shock.
Ive checked out a few website and it sounds like too much rebound damping can be caused by nitrogen leakage/someone fiddling.
Do you agree?

[Frost]

See that screw up by the gold end, turn it.
Compress the shock by hand then turn that and you'll find it uncompress much more easily.

[Vincent]

Should it be possible to compress the spring by hand? Doesn't sound right to me
____________________
Space Is Deep

[Frost]

re-read it, he said he removed the spring and compressed the shock by hand.

[isle of man kmx]

I need to tell you the photo i posted is a google image.
My shock is exactly the same but DOESNT have the gold screw.
sorry for any confusion

[Vincent]

[lihp]

is the preload adjustable?

If the shock has no adjustments at all, and is for a different bike, I would hazard a guess that it isn't suitable for what you want it to do.

[isle of man kmx]

Good news
I took the shock to my local dirt bike mechanic 'Juan Knight in Sulby'
He filled it with Nitrogen,i put it on the bike and it works great.
Thanks for your advice
John