The assumed operating temperature for forks is 40☌ or 104☏ and for shocks 100☌ or 212☏. A value of 1 would be no change in viscosity with temperature. I expect to use a slightly stiffer compression/rebound setting over the standard settings. Along with the viscosity grades and viscosity level at 100 degrees Celsius, look for the kinematic viscosity at 40 degrees Celsius measured in centistokes (cSt). Viscosity pg1 Shock pg2 Shock VT is the ratio of the viscosity at 40☌ divided by the viscosity at 100☌, less change the better whencomparing similar viscosity fluids. I am about 100kg and will put in a 22.7 over the weekend. You need to check the manufacturers' data sheets to be sure not to get oranges instead of apples. Still looking for a more readable version. Will that increase your damping? NO! The 10W from Castrol has only 15.00 To make matters even more complicated, the Castrol Synthetic Fork Oil 5W has 28 and in 10W it is 42.00 The 7.5W Motorex Racing Fork Oil has 35.9 while the 10W Silikolene Fork Oil has 34.90 are a couple charts listing a bunch of fork oils and their Theres a lot more to it than the weight, temps make a big difference. Let's say you replace it with 10W from Castrol. The viscosity of fork oil is important as it has to maintain its. However, many people will recommend automatic transmission fluid (ATF) as a fork oil substitute thanks to its similar properties. Here is a chart comparing kinematic viscosity at 40 degrees Celsius for different brands and weights. There aren’t many suitable alternatives to motorcycle fork oil, as the role of this fluid is very important and specific on your motorcycle. Engine oil is mainly used for lubricating and cooling down the engine components. As a thumb rule, go for fork oil with low viscosity for off-road motorcycles and fork oil with high viscosity for on-road motorcycles. not really in the same order as the real weight. The fork oil is the oil that goes in the front forks of a motorcycle and acts as the shock absorber. If you want a apple-to-apple comparison you need to look at the viscositiy the oil has at 40☌ SUZUKI FORK OIL L01 (the one recommended in the Workshop Manual) has 15.50 As was suggested here, it is a 5W oil. This table is sorted by real viscosity (centiStokes), not by nominal weight. Here’s a really nerdy table that uses the much tighter Centistoke (Cst) testing scale, so we can compare brands with accuracy.Unlike motor oil, there is no viscosity standard for fork oil. But, due to the international SAE standard being so loose, one oil company’s 5Wt can be the same viscosity as another’s 7.5Wt.

So what oil should you use in your suspension? Most suspension units use approximately a 5Wt (SAE). performance when faced with changes in temperature due to its high viscosity index. Buying the right oil for your bike is very important as it can effect performance and the amount of wear-and-tear your bike receives. Synthetic hydraulic oil for motorcycle forks and shock absorbers.

Motorcycle fork oil viscosity chart