Rider questions

By Travis Flateau, TBT Racing · tuning since 1992

Straight answers to the suspension questions riders ask us most.

What is sag, and how do I set it?

Sag is how far your bike sinks under its own weight and under you. Set it right and the bike turns, tracks and lands the way it was built to.

Do I need a revalve, or just new springs?

Springs hold you up; valving controls how fast the suspension moves. Start with the right springs for your weight, then revalve if the bike is still harsh, deflects or bottoms for how and where you ride.

How often should I service my fork and shock?

Service your fork and shock about every 12 months or 40 hours of riding, whichever comes first. Race bikes and hard desert miles need it sooner.

How should I set up my suspension for Baja and the desert?

Desert and Baja riding needs suspension that stays calm at high speed, holds up in whoops and doesn't bottom on big hits, mile after mile. That usually means the right springs for your loaded weight and valving built for speed and heat.

Why does TBT ask for my weight in street clothes?

Street-clothes weight is a number every rider can measure the same way, so every TBT setup starts from the same honest starting point. We add your gear the same way every time.

What do the compression and rebound clickers do?

Compression controls how easily the suspension goes in when you hit a bump. Rebound controls how fast it comes back out.

How do I know my springs are wrong for my weight?

If you can't get your race sag and static sag in range at the same time, your springs are wrong for your weight. On 6,679 TBT build sheets the typical static sag is 35mm, and on 2,499 the typical race sag is 102mm.

Why is my fork harsh on small bumps?

A fork that's harsh on small bumps usually has old oil, worn bushings, too much compression, or valving that isn't built for your speed and terrain. Start with a service, then tune.

What's the difference between a suspension service and a revalve?

A service puts your suspension back to fresh: new oil, seals and wear parts. A revalve changes how the suspension works so it fits your weight, skill and terrain.

How does ship-in suspension service work?

Fill out the TBT work order online, pick Ship-in, and send your fork and shock to TBT. We build them for your weight and riding, then ship them back.

Should my setup be different for motocross and off-road?

Yes. Motocross needs support for big jumps and hard landings; off-road needs comfort and traction over rocks, roots and long rough sections. Same bike, different setup.

What does bottoming out feel like, and how do I fix it?

Bottoming is a hard clunk or jolt when the suspension uses all of its travel. The fix is usually the right spring for your weight first, then more compression support.

I'm a heavier (or lighter) rider. What should change?

Start with springs that match your weight in street clothes. Then the valving should match too, because a heavier rider pushes the suspension faster and a lighter rider can't move stiff valving.

How do I keep track of my suspension settings?

Write down every setting before you change anything, then note one change at a time and how it felt. That way you can always get back to a good base.

Bike setups

KTM 300 XC-W and Husqvarna TE 300 suspension setup

These enduro 2-strokes run the WP XPLOR fork. Most riders need springs matched to their weight and valving built for rocks, roots and tight trail.

Yamaha YZ450F suspension setup

The YZ450F runs a KYB coil fork and shock. Most riders above average weight need stiffer springs than stock, plus valving tuned to their speed.

Yamaha YZ250F suspension setup

The YZ250F's KYB coil fork and shock work best with springs matched to your weight. Lighter riders and youth often need softer springs than stock.

Honda CRF450R suspension setup

The CRF450R runs a Showa coil fork and shock. Springs matched to your weight and valving for your speed are what make it feel planted.

Kawasaki KX450 suspension setup

The KX450 runs a KYB coil fork and Uni-Trak shock. Heavier riders usually need stiffer springs than stock to keep the bike level and stop it bottoming.

Beta 300 RR suspension setup

The Beta 300 RR is a favorite for enduro and hard enduro. Springs matched to your weight, plus valving for slow, technical terrain, make it calm and full of traction.

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