Has anybody got any advice about changing the rear shock pre-load.I havnt much idea on this subject.The reason i ask is because on some photos (of me on the bike)i noticed that the back end appears to be close to bottoming out on most of the pics(i weigh 13 stone).I`ve also noticed that when i pull the bike to the vertical when its been leaning on the stand,the rear end goes down quite a bit,maybe a couple of inches.Is all this fairly normal or what??

The bikes an 04 sherco.

Cheers

I would put the bike on a stand and check the swingarm for any movement, then I would maybe adjust the spring a little, just to tighten things up. Have you ever lubed your linkage?

Stand the bike upright(off the sidestand) and holding the bars to balance the bike, set the spring so there is about 25mm travel of the rear axle to mudguard(measured vertically) under the bikes own weight(static sag). For average rider 75 kilos(not sure about stones). Take it closer to zero if you are a big boy!