Maxton GP20 Fork Cartridges

[Luke_Price]

Good morning! I'm after some information that any of you may have about these cartridges.

These seem to be a better option as both fork legs can have rebound and compression damping as well as preload.

Can anyone here with this mod tell me how they are and how much they cost?

Here's a link for them if you want a gander...

Maxton Suspension home page

Cheers.

Sent from my SM-G903F using Tapatalk

 

[trevorleigh]

Good morning! I'm after some information that any of you may have about these cartridges.

These seem to be a better option as both fork legs can have rebound and compression damping as well as preload.

Can anyone here with this mod tell me how they are and how much they cost?

Here's a link for them if you want a gander...

Maxton Suspension home page

Cheers.

Sent from my SM-G903F using Tapatalk

Hi Luke

I have known the guys (and ladies) at Maxton for quite some time, top quality parts and service, I would recommend them highly. Made a huge difference to my bike. All the info you need is below:

YAMAHA MT-09
FRONT
The front forks on the MT-09 are upside down forks with preload adjustment in both legs but only rebound damping adjustment in one leg. The forks feel like ‘harsh pogosticks’. Over small bumps they can kick and make the front end a bit nervous at high speeds, but the biggest problem with these forks is the lack of rebound damping, this causes the front of the bike to spring back very quickly when you let go of the brake, making the bike difficult to get in to a corner and run wide out of corners. The springs in the forks are OK for the average rider weight.
The damping and springing have been split between the forks, the left leg has a spring inside but no damping and the right leg has a spring and damping inside. This means that the damping leg has to have twice as much rebound damping and compression damping to compensate for the other leg having no damping.
The damping leg can be revalved to try and prevent the forks springing back too quickly, but when you do this the ride becomes even harsher over small bumps. This means you can not revalve the damping successfully, so we replace the internal fork cartridges for our GP20 fork cartridges. The Maxton GP20 fork cartridges have rebound damping and compression damping in both legs. To reduce the cost of the cartridges we use the standard fork tops, so this means even though you have rebound damping and compression damping in both legs the rebound damping is only altered from one leg. The GP20 cartridges are built to order so we valve and spring them to suit your rider weight and what you are using the bike for. The damping inside the forks is progressive, this means the first part of the travel is soft and compliant but the faster and further the forks move the more support and control the forks have. This means the forks will absorb small bumps in the road but under heavy braking they have support and also control when you let go of the brake. We fit springs to the GP20 cartridges to suit your rider weight and what you are using the bike for. The cost of the GP20 fork cartridges is £340.00 + V.A.T per pair, the cost of servicing the forks with new fork seals and fitting the GP20 cartridges is an extra £140.00 + V.A.T per pair.
If you would like adjustable rebound damping in both legs we supply our GP20 fork cartridges with new Maxton fork tops. These cartridges cost £480.00 + V.A.T per pair and an extra £140.00 + V.A.T to fit them with new fork seals.
REAR
The standard unit on the MT-09 is very cheap; the unit feels like a ‘pogostick’ as it does not have enough rebound damping. The spring on the unit is too soft for the average rider weight. The standard unit is a sealed item so can not be revalved or rebuilt. We could respring the unit and fit a harder spring but this would only make the rear of the bike more of a ‘pogostick’.
We recommend replacing the unit with a Maxton NON-remote unit. This unit is basically an RT10 shock without the remote reservoir. The Maxton unit is an alloy bodied high pressure gas shock with a floating piston to separate the oil and gas. The unit is adjustable for rebound damping, compression damping, preload and ride height adjustment. The Maxton unit is built to order so we valve and spring the shock to suit your rider weight and what you are using the bike for, we also base set the adjusters at a setting that suits you. The preload adjustment is very quick and easy to get to. The Maxton unit costs £415.00 + V.A.T.

If you need any further info give Richard at Maxton a call on 01928 740531 the phone can get pretty busy, I usually email him [email protected]