Suspension
The 49 mm telescopic forks and the preload/rebound-adjustable rear shock: fork-oil change (SAE 10W-20, ≈515 mL, 203 mm level), spring & oil-level specs, rear-shock adjustment, fork/shock/swingarm removal and bearing service.
Chapters· Suspension
Source: Service Manual — pp. 13-1 … 13-22src: Kawasaki VN2000-A1 Service Manual — Periodic Maintenance (Torque & Locking Agent / Specifications tables, pp. 2-7…2-13)
Fork dimensions, oil grade/quantity/level and spring length; rear-shock preload and rebound settings.
Front fork (per leg)
| Item | Standard | Service limit |
|---|---|---|
| Fork inner-tube diameter | 49 mm | — |
| Fork oil viscosity | SAE 10W-20 | — |
| Fork oil capacity — when changing oil | ≈ 515 mL | — |
| Fork oil capacity — dry (completely disassembled) | 605 ± 2.5 mL | — |
| Fork oil level — fully compressed, no spring, below inner-tube top | 203 ± 2 mm | — |
| Fork spring free length | 470.9 mm | 461 mm |
| Spring / air / rebound settings | Non-adjustable | — |
Rear shock absorber
| Rebound damping — standard For an average 68 kg rider, solo, no accessories. | 6 clicks out from fully clockwise |
|---|---|
| Rebound damping — range | 0 (hard) … 7–8 (soft) |
| Spring-preload length (spring end → flange end) — standard | 32.5 mm |
| Spring-preload length — usable range | 27.5 – 37.5 mm |
Fork, axle-clamp, rear-shock and swingarm-pivot torques. Remarks: AL tighten clamp bolts alternately twice · L locking agent.
Suspension fasteners
| Fastener | Torque | Remarks |
|---|---|---|
| Upper front-fork clamp bolts | 20 N·m | — |
| Lower front-fork clamp bolts | 34 N·m | AL |
| Cover-stopper bolts | 4.2 N·m | — |
| Front-axle clamp bolts | 25 N·m | AL |
| Fork-bottom Allen bolts | 23 N·m | L |
| Rear shock-absorber bolt & nut | 59 N·m | — |
| Swingarm pivot-shaft nut | 127 N·m | — |
“AL”: tighten the two clamp bolts alternately, two passes each, so both reach an even final torque.
Drain, refill with ≈515 mL SAE 10W-20 and set the oil level to 203 mm with the level gauge.
Fork-oil change
Front wheel, front fender, nacelle and handlebar come off first (see the Wheels/Tires and Frame chapters). Do one fork at a time.
Fork Oil Level Gauge 57001-1290
- 1
Loosen the upper fork clamp bolt, remove the cap, push down the top plug and remove the stopper ring; take off the collar and lift the fork out.
- 2
Remove the rubber damper, cover, washer and spring, then drain the oil into a container — pump the inner tube up and down at least ten times to expel it.
- 3
Pour in fresh fork oil (SAE 10W-20, ≈515 mL) and wait about five minutes for suspended air bubbles to surface.
Torque≈ 515 mL - 4
Set the level gauge stopper to 203 mm, insert the tube into the inner tube (fully compressed, spring out), and draw out the excess until no more oil rises.
If no oil is drawn from the start, there is too little in the fork — add some, then draw the excess down to the 203 mm level.
- 5
Refit the cover, rubber damper, washer and spring (smaller-diameter end down), install the fork in the clamps and torque the lower clamp bolt (AL).
Torquelower clamp 34 N·m - 6
Fit the collar, a NEW stopper ring and the cap, then reinstall the fork correctly (see Front-fork installation).
Rebound damping (clicks) and spring preload (27.5–37.5 mm) to suit load, road and speed.
The rear shock is adjustable for rebound damping and spring preload. Remove the seats (and battery cover) to reach the adjusters. Turn the rebound adjuster toward 0 for a harder/heavier/faster setting, toward 7–8 for a softer/lighter/slower one; standard is 6 clicks out from fully clockwise for an average 68 kg rider. For preload, loosen the locknut and turn the adjusting nut with the hook wrench to set the spring-end-to-flange length within 27.5–37.5 mm (32.5 mm standard) — shorter is softer, longer is stiffer — then retighten the locknut.src: Kawasaki VN2000-A1 Service Manual — Periodic Maintenance (Torque & Locking Agent / Specifications tables, pp. 2-7…2-13)
Rear-shock settings
| Adjuster | Soft / light / smooth / low speed | Standard | Hard / heavy / rough / high speed |
|---|---|---|---|
| Rebound damping | 7 – 8 clicks out | 6 clicks out | 0 (fully clockwise) |
| Spring preload length | 27.5 mm | 32.5 mm | 37.5 mm |
Hook Wrench 57001-1580 turns the preload adjusting nut. Set both shocks the same — a pair that no longer matches should be replaced together.src: Kawasaki VN2000-A1 Service Manual — Periodic Maintenance (Torque & Locking Agent / Specifications tables, pp. 2-7…2-13)
Lifting the bike safely, then front-fork, rear-shock and swingarm removal with the pivot torqued to 127 N·m.
Front-fork removal & installation
Lift the front with the jack (57001-1238) and jack attachment (57001-1571) under the frame pipes, plus a jack under the engine.
- 1
Raise the front wheel until the rear wheel just touches the ground, then remove the front wheel, front fender and headlight cover.
WarningBe sure the rear wheel is on the ground when removing the front fork — otherwise the motorcycle may fall, causing an accident and injury.
- 2
If the fork will be disassembled or have its oil changed, remove the top plug before pulling the fork (see Fork-oil change).
- 3
Loosen the fork clamp bolts and remove the fork.
- 4
On installation, set the inner-tube top flush with the upper surface of the stem-head bracket, then torque the upper clamp bolts, lower clamp bolts (AL), and the front-axle and caliper-mounting bolts.
Torqueupper 20 · lower 34 · axle 127 · clamp 25 · caliper 25 N·m - 5
Check front-brake effectiveness before riding.
WarningDo not ride until a firm lever is obtained by pumping the brake lever until the pads contact the disc — the brake will not work on the first pull otherwise.
Rear-shock removal
- 1
Lift the rear wheel off the ground with the jack and attachment, then squeeze the front brake lever and hold it with a band.
WarningHold the front brake when removing the shock — otherwise the motorcycle may fall, causing an accident and injury.
- 2
Remove the seats, battery cover, left side cover and the hose cover, then the shock front mounting bolt & nut and rear mounting bolt & nut (lift the wheel slightly to free the rear bolt); lift the shock out.
- 3
On installation, grease the needle bearing and oil seals, fit the shock with the rebound adjuster facing up, and torque the bolt & nut.
Torque59 N·m
Swingarm removal & bearing service
Rear wheel, rear shock, rear caliper, mud guard and belt lower cover come off first (see the relevant chapters).
- 1
Remove the pivot-shaft cap and nut, withdraw the pivot shaft and lift the swingarm out.
- 2
On installation, grease the bearings and oil seals, fit the collar, insert the pivot shaft from the right side and torque the pivot nut.
Torque127 N·m - 3
After fitting, top up the brake reservoir and bleed the rear brake line (see Brakes chapter).
Do not remove the swingarm bearings for inspection — removal damages them. Inspect needle/ball bearings and sleeves in place for abrasion or discoloration and replace as a set if worn.
A straightened inner or outer fork tube can fail in use. Replace a badly bent or creased tube — never re-bend and reuse it — and replace the oil seal whenever an inner tube is repaired or replaced.src: Kawasaki VN2000-A1 Service Manual — Periodic Maintenance (Torque & Locking Agent / Specifications tables, pp. 2-7…2-13)