I'm wanting to adjust/tune the suspension on my 2000 XR250R a bit as at the moment I'm finding it a tad soft (particularly in the front) and after 13 years it can probably do with it. According to RaceTech < http://racetech.com/ > the standard suspension specifications are: Front: KYB 41C 41mm conventional Stock Fork Spring Rate 0.398 kg/mm (stock) Recommended Preload 4mm Rear: KYB 44 mm Stock Shock Spring Rate 11.3 kg/mm < http://racetech.com/ProductSearch/1/Honda/XR250R/2000 > Using their calculator the recommended setup for me would be: Recommended Fork Spring Rate: 0.454 - 0.466 kg/mm Recommended Shock Spring Rate: 11.476 - 11.592 kg/mm I'm thinking therefore a 11.5kg/mm rear spring would be best. Either: Racetech SESP 886115 SK SPRING 55.5 x 190 11.5kg, or: Eibach Shock Spring EI886.0115.1 - 11.5kg Rate < http://www.xrsonly.com/eibach-shock-spring-honda-xr250r-96-up-11-5kg-rate > But I don't seem to be able to find any replacement front springs to suit? Racetech state that they are FESP 990 Spring Series, but I cannot find any listings of this type? Any recommendations on where to look for a supplier of front springs to suit? When doing the front forks, is there anything else to consider such as fitting Racetech FMGV 2040 Type 1 Gold Valve Kit (Standard Type 1 Compression Kit) < http://racetech.com/ItemInfo/1 >? What about tuning the rear setup? It looks as though the shock absorber has a setting on it (marked: H <-> S)? What is the effect of this adjustment? And the top of the rear spring is adjustable? Is this to alter the height of the back of the bike or is it to adjust preload on the rear spring?