Your pace-past-step guide to setting the sag | Gassit Garage | How To

23 April 2022 / Text Size (-) (+) / Impress

BASIC SUSPENSION SET-UP

N o, nosotros are not referring to your poor posture afterward a long day in the saddle. Rider sag relates to the corporeality that a bike's suspension compresses when you sit on it, and at that place is generally an optimum setting for different bikes and applications.

To work out passenger sag we must first decide if the static sag is in the correct 'zone' (i.e. 5-10mm). Static sag is how much of the interruption travel is taken upwards past the bike's weight. Then we check the sag with the rider on lath.

It may sound complicated but it's not, and we're going to give you ten unproblematic steps to check this at home – all you'll need are a few tools and a couple of willing helpers. Non merely does this procedure assist your wheel to operate in optimal range of its interruption travel while riding, it as well reveals whether the bound rates on your motorcycle need to exist changed to adjust your weight.

Start here

one.We'll commencement with the front, and then the wheel needs to exist off the basis with the forepart forks fully extended.

2. Carefully measure out the free length of the fork leg at total extension (F1). For upside-down forks, measure from the fork seal to where the leg-hub casting starts; on conventional forks the top of the fork seal to the underside of the lower triple clamp works. Then measure the fork length when the bike is sitting with just its own weight practical (F2). The static sag tin can be determined by subtracting F2 from F1. And so F1 – F2 = static sag.

iii. Now, with the bike back on the ground, take the rider sit on information technology in the normal riding position and with the normal riding gear and baggage. It is best to have a 3rd person to hold the cycle upright while yous take another measurement from the exact aforementioned identify (call this F3). Make sure the rider has both anxiety on the pegs and is not applying either brake.

4. Deduct the measurement taken at Step 3 from the free length measurement taken in Stride ii and you have the sag corporeality for the front end. In this case F1 – F3 = front rider sag (e.one thousand. 125mm – 95mm = 30mm)

5. The rear follows a similar procedure, and then offset by lifting the bicycle completely off the ground to measure the shock's free length (R1).

6. Placing a mark on something stock-still to the subframe in a higher place the centre of the rear beam will assistance to give you consequent figures. Bodywork is subject to flex and motion that can throw your calculations out.


7. Once more make sure the passenger is in the normal riding position before taking the 3rd measurement (R3) and employ the same measuring points from beam heart to your mark.

8. The rear passenger sag in this case is R1 – R3 (for instance 478mm – 440mm = 38mm). Check your service transmission for the recommended spring preload setting and outset there. Ideal rider sag can range from 25mm to 40mm or more, depending on the bike and how you intend to use information technology. A expert dominion of thumb is to aim for 30mm for street employ, and 25mm for rails utilize.

9. The sag amount is adjusted by adding or removing spring preload front and rear. Add together preload to reduce the sag and remove preload to obtain a higher rider sag effigy. One full rotation of the preload adjuster on the forepart fork usually changes the sag by 1mm.

10. Repeat the measurements and cheque that the preload aligning has had the desired outcome. Adjusting the suspension sag will touch on the wheel's handling characteristics so brand changes in minor increments and test the bike carefully afterwards.

  By Paul McCann