Part One: The Actual Situation of the Pre-Spring Shock Absorber 

1.Not all motorcycles' front shock absorbers can be adjusted. Take this popular Ducati Monster for example, its front shock absorber is also non-adjustable. It has only a fixed mechanical structure. This is not an isolated case. Many large-displacement street bikes and racing bikes are in the same situation. Since they can't be adjusted, what should we do? 

Accept hardware settings: 

2. Seek alternative solutions: 

The focus is on adjusting the rear shock absorber, using the feedback from the rear wheels to balance the overall driving experience. 

Adjust your riding posture slightly, and use the seat height and the distance between the handlebars to adapt to the bike frame. 

3. Vehicle model compatibility logic: If there is no adjustable knob on the front shock absorber, we will focus our main efforts on the precise matching of the rear shock absorber. 

Part Two: Core Tuning - Post-Damper Preload 

If your front shock absorber is not adjustable, or if you have an adjustable rear shock absorber, then the preload (Preload) is the key to the adjustment. The adjustment method (only the sense of body movement is considered, not specific numbers):

1. Petite build / Light build: 

Loosen slightly counterclockwise. 

Feelings: The vehicle body is lighter, and it doesn't "push down" the driver's waist when passing over speed bumps. The start is also more agile. 

2. Body shape: Standard / Moderate 

Maintain the original factory standard value. 

Feelings: Balancing comfort and support, without any instability or collapse, is the most reliable choice. 

3   Tall build / Predominantly muscular: 

Tighten slightly clockwise. 

Feelings: The vehicle has greater body support. Even when carrying people or goods, the body won't sink or collapse, and the handling is stable without any wobbling. 

If your car's front shock absorbers are adjustable: First, adjust the "pre-load" according to your body size. 

(1) Pre-damping adjustment 

Safe parking: The vehicle should be upright, the engine turned off, the front wheels lifted off the ground, and the shock absorbers fully extended. 

2. Locate the adjustment position: 

- Main fork: Top adjusting nut 

- Reverse fork: Bottom preload ring 

3. Adjustment operation: 

Clockwise = Increase preload (more rigid, stronger support) 

Counter-clockwise = Decrease preload (more soft, more comfortable) 

Each time, adjust by 1/4 to 1/2 a circle, and make the left and right adjustments in equal amounts. 

4. Marking: Note down the initial position for easy rollback. 

(2) Post-reduction preload adjustment (single/double compatibility) 

Safe parking: The vehicle is upright with the rear wheels off the ground, and the rear shock absorbers are fully extended. 

2. Locate the adjustment position: 

- Single Gun: Top/Bottom Adjustment Ring 

- Dual guns: Adjust simultaneously on both sides 

3. Adjustment operation: 

Clockwise = Increase preload (The rear of the vehicle becomes higher and the support becomes stronger) 

Counter-clockwise = Decrease preload (The rear of the vehicle becomes lower and more comfortable) 

Each time, move one quarter to one half of a circle, and both guns should be moved in the same direction. 

Please note: 

When adjusting the preload, move just one small notch at a time. After adjusting, ride for a while to feel it - "no jolts, no collapse, no side-slip during turns" is the correct feeling. Don't turn it too much at once. 

Part Three: Fine-tuning Techniques for Different Road Conditions 

After the preset settings are completed, adjust the "compression/rebound damping" according to the road conditions under your feet to further optimize the feel. 

Paved asphalt road 

Requirements: Comfortable + Responsive, capable of filtering out minor bumps, maintaining stability at high speeds. 

- Method: 

Front shock absorber: Adjust a little softer (no numbness in hands when passing over manhole covers and potholes); Rear shock absorber: Keep the preload value, loosen the rebound damping by one notch (no jerking when braking, no jolting when accelerating). 

Applicable models: Street bikes, racing bikes, cruising bikes, for daily commuting and intercity riding. 

2. Unpaved roads (poorly paved roads, dirt roads, ADV cycling) 

Requirement: Strong support with slow rebound to prevent the "base" of shock absorption from failing (colliding with the bottom and damaging the vehicle is dangerous). 

- Method: 

Front shock absorber: Tighten a little bit (to handle impacts from gravel and potholes); Rear shock absorber: Tighten 2 notches (when carrying passengers or cargo, to prevent the vehicle body from sinking). 

Applicable vehicle types: ADV, off-road vehicles, rally cars, long-distance off-road vehicles. 

Part Four: Fine-tuning Techniques for Different Vehicle Models 

Different models have different body structures and centers of gravity. A more refined adjustment of the shock absorbers will make the handling even more smooth. 

Street cars/racing cars (emphasizing control and agility) 

Core concept: Stable in the front, agile in the rear. 

Setting method: The front shock absorber (if adjustable) should be tightened slightly more than the original factory setting (to prevent body roll during cornering). The rear shock absorber should be loosened slightly compared to the road surface (balancing flexibility and comfort). 

2. ADV / Off-road Vehicle (Emphasizing Off-road Capability) 

- Key point: The front and back are slightly firm, with a stable base. 

Setting method: Directly adopt the basic settings of "unpaved road". If the figure is tall, adjust the front shock absorber (if adjustable) and make it tighter slightly. 

3. Cruise vehicle / Vintage car (emphasizing comfort and stability) 

Key feature: Soft at the front and back, good shock absorption. 

Setting method: The front shock absorber (if adjustable) should be set slightly looser than the road surface, while the rear shock absorber should maintain the preload value (suitable for long-distance cycling, avoiding backache). 

Part Five: Fine-tuning Techniques for Different Cycling Habits 

"Relaxed cruise mode, traveling at a moderate and steady speed. The main feature is comfort: it can be further adjusted to a softer setting, providing even better shock absorption." 

- Steady acceleration through corners, frequent speed changes, acceleration and braking: The overall setting can be tightened by 1 level, providing stronger support and enabling smoother cornering without any sluggishness. 

No matter how you adjust, the core principle is: no tipping, no collapse, no shaking. This is the best shock absorption setting. If the vehicle can be adjusted, we will precisely adjust it; if it cannot be adjusted, we will adapt to it. Don't be afraid to try. Even if it's just a small adjustment, it's the beginning of a harmonious connection between the person and the vehicle. There is no absolute standard for shock absorbers. As long as it suits you best, it's the right one. 

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