Which model do you have the TR or the SR125? The SR forks are really low budget. They can be made to work ok by preloading the springs and running 90wt synthetic gear oil in them. The tolerences inside demand very thick oil to get damping.

 

I have the SR model. Thanks for the advice, I'll go with 90WT oil now.

 

Make the fork oil level about 100mm from the top of the tube with the spring out and fork compressed. As for the preload spacers try looking at Lowes in the nut and bolt isle. Get a pair of nylon spacers 1x3/8x3/8" and place one in each fork tube on top of the spring before you replace the fork cap. This will stiffen the spring rate of the progressive fork springs.
On the shock as I remember the length is 275mm but you'll need about a 800lbs in spring. That's about what the stock spring is. Try adjusting the preload to get about 2" of sag with you sitting on it. For reference my son has the 110 (same shock) and weighs 75lbs. He runs a 400lb/in spring.

 

You could buy some cheap REAL Marzocchi forks legs and have a set of quality forks already setup for your weight.

http://planetminis.com/forums/chine...-general-discussion/210905-bad-fork-slop-w-new-marzocci-oem-forks-sr160-tx.html

 

Only problem is those forks cost more than his bike did. If you buy a SSR SR model you have to understand they are not made for an adult to do serious moto on. They will break if you do.

 

Thanks for the advice everyone.

I think I'm just going to go with heavier fork oil and spacers for the front forks and the DNM 900lb rear shock. That should be good for riding trails, I'm not doing any serious racing/jumping.

I realize the SSR is not a serious bike but it's all I could buy at the time and now i'm slowly upgrading it. I will probably invest in some better forks in future and then a piranha 140 engine.

 

Maybe try looking for a set of fastace forks.
SSR makes good bikes its just the SR models are made with mild steel frames and very inexpensive suspension. They are made for trail riding not jumping. The TR and TX models are much better suited to adults that like to jump.