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Motorcycle Ergonomics

Dual sport · 2025

Suzuki DR-Z4SM ergonomics: seat height, rider triangle & fit

The Suzuki DR-Z4SM has a 35.0 in seat. Here’s how riders of different sizes fit, and what you can change.

Seat height
35.0 in
Wet weight
340 lb
Wheelbase
57.7 in
Power
28 kW
Specs: ManufacturerBars & pegs: EstimatedSeat width: Estimated

Try it with your measurements

Units
Your measurements

Modifications

Try common parts and see how they change your fit. The picture shows your setup over the stock bike.

Seat
0

Thicker or thinner seat. Lower makes it easier to reach the ground.

0

Lowers the whole bike. Easier to reach the ground, a little less legroom.

Handlebar
0

Raises the bars. You sit more upright with less weight on your wrists.

0

Brings the bars closer to you. Shorter reach, good for shorter arms.

Footpegs
0

Lowers the footpegs. More knee room, less cramped legs.

0

Moves the pegs back (or forward). Further back feels sportier.

Windscreen
0

Taller or shorter screen. Changes how much wind hits your chest and helmet.

73Good fit

Rider on the Suzuki DR-Z4SM, Riding view 71° 118° 139°
N 0 mph— rpm 0%
Specs: ManufacturerBars & pegs: Estimated

Single · 398 cc · Hold W or Space to accelerate, ↑ / ↓ to change gear · Synthesised from the engine layout and firing order. Not a recording.

Original illustration, motorcycleergonomics.com

Fit score

73/100

Good fit

Knee 71°

Within range

Comfort 66–105°

Hip 118°

Within range

Comfort 92–122°

Elbow 139°

Within range

Comfort 118–165°

Back lean -4°

Within range

Comfort -6–16°

Ground reach

2.3 in short of flat feet

One foot flat, hips shifted

Seat height with sag
33.7 in
Leg length needed
35.1 in
Your inseam + boots
32.8 in

Standing on the pegs

Bars 0.7 in too low for standing

Wind

Clean air at your helmet, body sheltered

Suggested fixes

  • Lowering links -1.8 in

    Fit score 73 → 85

    Find parts ↗

  • Boots with a thicker sole +0.8 in

    Fit score 73 → 79

    Find parts ↗

  • Low seat or reshaped foam -1.4 in

    Fit score 73 → 79

    Find parts ↗

Lowering changes handling and side-stand lean; check with a specialist.

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Estimate. Handlebar and peg positions for this bike are estimated. Always sit on a bike before you buy it.

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Fit by rider size

RiderInseamFitGround reachKneeLean
5′1″28.1 in51Feet don’t reach the ground82°1°
5′4″29.5 in57Feet don’t reach the ground78°-1°
5′7″30.8 in65Tiptoes on one foot74°-2°
5′10″32.2 in75One foot flat, hips shifted70°-4°
6′1″33.5 in82Balls of both feet67°-5°
6′4″35 in83Both feet flat64°-6°

Reference riders with average proportions and 20 mm boot soles. Your proportions may differ.

Spec sheet

Suzuki DR-Z4SM — Drawn to scale from this bike's geometry.Seat height 35.0 inWheelbase 57.7 in
Drawn to scale from this bike's geometry.

Geometry & specifications

Geometry & specificationsValueSource
Seat height35.0 inManufacturer
Seat width at the front—Estimated
Handlebar grip16.5 in ahead of the seat, 10.6 in above itEstimated
Footpeg4.3 in ahead of the seat, 15.6 in off the groundEstimated
Wheelbase57.7 inManufacturer
Wet weight340 lbManufacturer
Rake26.5°Manufacturer
Trail3.7 inManufacturer
EngineSingle · 398 ccManufacturer
Power28 kWManufacturer
Tyres120/70-17 / 140/70-17Manufacturer
CategoryDual sportManufacturer

Sources

Specifications transcribed from manufacturer publications; independent verification in progress. Methodology

How did it actually fit?

Real reports help validate our estimates for everyone. No account needed.

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Seat height
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Wet weight
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Seat height
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Wet weight
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Suzuki DR650S

Seat height
34.8 in
Wet weight
366 lb

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