04-03-12, 02:00 PM
Sadly the chart explains the obvious solution, but the springs you can buy for the Fazer are not linear, they are all (as far as I'm aware) dual rate progressives. Still, it would be fairly easy to fit a set of 1.0kg/mm springs from another bike with 41mm forks with a bit of investigation.
The Hagon / Hyperpro replacement springs are progressive, meaning they have about two thirds of the spring with loose / wide coils & the final third with coils very close together. Effectively it's a dual-rate spring that is a one-size-fits-all solution, and so can be roughly equivalent to 1.0kg/mm springs. Most suspension shops won't touch progressive springs as they are difficult to fine-tune, particularly for racing / trackdays. For road use however, they are fine.
Raising the forks up through the yokes will improve the handling but reduce ground clearance & the amount of travel the fork has. I suspect you're being asked to do this to allow more weight over the front-end. I take it you have to either fit heavier fork oil or change the height of the fluid inside the fork to compensate?
Fit a cable tie first so you can see how much travel is being used up. I would start @ 5mm, then if ok go to 10mm, then 15mm if you still have a safe amount of fork travel left.
The Hagon / Hyperpro replacement springs are progressive, meaning they have about two thirds of the spring with loose / wide coils & the final third with coils very close together. Effectively it's a dual-rate spring that is a one-size-fits-all solution, and so can be roughly equivalent to 1.0kg/mm springs. Most suspension shops won't touch progressive springs as they are difficult to fine-tune, particularly for racing / trackdays. For road use however, they are fine.
Raising the forks up through the yokes will improve the handling but reduce ground clearance & the amount of travel the fork has. I suspect you're being asked to do this to allow more weight over the front-end. I take it you have to either fit heavier fork oil or change the height of the fluid inside the fork to compensate?
Fit a cable tie first so you can see how much travel is being used up. I would start @ 5mm, then if ok go to 10mm, then 15mm if you still have a safe amount of fork travel left.