Rear spring

[Pavetim]

2018 MXR. I am getting all the stuff from N2dirt for fork and shock revalve and mx tech Midvalve. I know the stock is over sprung, I am 230 and had my sag at 100mm and 30mm. Doesn't that mean the stock spring is fine for me?

 

[Philip]

It is a bit too soft for you.

 

[Pavetim]

Is it just this bikes geometry? My 450 the perfect sags are 105 and 35. This bike has smaller sag numbers? i have a 6.0 in my kx450 now and is perfect for my weight.

 

[Philip]

I think the Alta's motion ratio is different from the KX, and you weigh 50lbs more than the Alta's target rider. You can compensate by riding slower, but I do not know if this is what you want to do.

It is too soft for motocross, especially if you are a jumper. But should be okay for trail riding.

 

[Fog 25]

I’am at 215 pounds and I run a 6.4 spring with 10 mm preload which gives me a 96mm sag on my N2Dirt supension I think a 6.6 spring will be good for your weight if you ride Moto. Trial riding a 6.4. The MXR has a different ratio in the linkage because of the wight of the bike so the standard 100/30 is off. You will be real happy with N2Dirt revalve.

 

[Pavetim]

Sweet

 

[Philip]

I'd recommend trying the 63N/mm (6.4kg/mm) first. You are a little heavier than Fog but probably not faster, are you?

 

[Pavetim]

Im not that fast. 450D rider

 

[Philip]

For my 200 lbs weight I like the stock 60N spring for ride and handling. But I will be trying the 63N spring if I want more confidence when jumping, I have one left over from my MX.

There are MX owners here who have 63N springs lying around, so you can save a few bucks by buying a used stock MX spring.

 

[Philip]

Fog, what fork pressure do you run?

 

[Fog 25]

Fog, what fork pressure do you run?

I run 157 fork pressure. Put a O ring or a zip tie on the fork tube ride some laps and see how far down your suspension goes.
Adjust the air pressure a pound at a time up or down until you have about 1”to 1-1/2” left. That will be you’re right air pressure for you. Then you can adjust the compression and rebound for feel you like.

 

[datadog]

Our race team recommendation for rear sag is 95mm, Different link.

 

[Pavetim]

Wow he said he sent me. 6.6 spring.

 

[Philip]

Wow he said he sent me. 6.6 spring.

Look at this as an opportunity to step up to at least a B-rider's level!

 

[Pavetim]

Sure hope it's not too stiff, guess that is what Alta recommended.

 

[Fog 25]

Sure hope it's not too stiff, guess that is what Alta recommended.

You most likely won’t even notice the 6.6 spring difference with the weight of the Bike. It will be good on the track

 

[Fod]

Our race team recommendation for rear sag is 95mm, Different link.

Details on this link?!?! N2 dirt also created some links for the alta!