It’s common to see custom bikes with swanky high-end shocks propping up their tails. Swapping out the rear suspension on a twin-shock bike is quick and easy, and can have a big impact on both handling and style. But if you upgrade your rear suspension without upgrading your front suspension, you’re doing it wrong.
There are myriad ways to beef up your bike’s front end, from full fork swaps to cartridge kits. But there’s a simpler way to eke the maximum performance out of your forks—like a simple Öhlins spring swap and oil change.
The front forks on my air-cooled Triumph Bonneville are basic 41 mm right-side-up units with zero adjustability. According to the internet, their springs have a rate of around 7 N/mm, and their oil has a viscosity of between 5 W and 10 W.…