I have a 2006 WR250F and its probably covered about 5000 to 6000 miles and about 50% of it off road. I noticed that the rear of my bike sits lower than normal recently by probably about 2 cm. This means that when putting the bike on the side stand it wants to stand more central. I also noticed that the bike bottoms out on on relatively small bumps and when traveling fast on a rough surface the rear tyre struggles to keep traction when accelerating. The other point i noticed was when on tarmac moving fast and accelerating the front end is now twitchey, i presume this is because the rear is sitting lower. I decided to check to see if the rear shock is leaking but it does not really seem to be leaking. I also checked to see if the spring is cracked and it seems fine. I am thinking i need to get the rear shock refurbished but before i remove it i have a few questions. 1.) What would a rear shock refurbish consist of as i have been quoted £99.99 for a refurb. 2.) Are my symptoms definitely a nakered shock or may i need to grease the swing arm pivot bearings? They have not been greased in at least 2500. miles.