The stock 30mm long-travel metal oil shocks on the YIKONG YK4061 RC Car deliver solid performance out of the box. No upgrade is required for light rock crawling. Keep the 26030 seal rebuild kit on hand for routine maintenance to prevent most oil leaks.
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Stock Specifications
The YIKONG YK4061 RC Car comes with four 30mm large-volume metal oil shocks. Part list:
- 26032 shock body
- 26033 preload adjuster ring
- 26034 shock spring
- 26030 seal rebuild kit
Damping is tuned for this low-CG tube crawler. Multiple top mounting holes let you adjust suspension travel and stiffness. Turn the preload ring clockwise for stiffer setup and counterclockwise for softer. Make sure preload is matched on both front shocks and both rear shocks, or you will get uneven ride height and poor traction.
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On-Trail Performance
The biggest strength is ample travel. It allows great chassis articulation and keeps tires planted on rocks. Combined with LCG design, the truck stays stable over obstacles and resists tipping, perfect for park runs and mild crawling. Factory oil gives neutral damping. On a stock rig without weights, compression and rebound feel smooth for slow crawling. The main weakness: oil seals wear and leak after runs in sand, mud and rock. With heavy brass weights added, stock damping struggles and causes excessive rebound.
Maintenance & Upgrade Tips
Rebuilding is more cost-effective than full replacement. If leakage occurs and no scratches are found on the shock body or shaft, replace all O-rings with the 26030 seal kit. Clean parts with isopropyl alcohol, refill fresh shock oil and bleed air bubbles. Shock oil weight guide:
- 100wt: Balanced for general crawling
- 150wt: Weighted rigs & steep climbs
- 60–80wt: Maximum articulation
If the shock shaft is gouged by rocks, leaks will recur even with new seals. Replace the 26032 shock body assembly. Avoid aftermarket extended shocks; they ruin suspension geometry, cause frame rub and hurt crawling performance. Adjust ride height with the preload ring first. Swap to higher-rate springs only when needed.
FAQ
Do I need to replace the whole shock if it leaks?
Not necessarily. If the body and shaft are undamaged, resealing and re-oiling usually works. Full replacement is only needed when the shaft is scored or the body is deformed.
What is the correct preload setting?
Keep even static ride height. The shock should compress and rebound smoothly without bottoming out. Never lock the spring fully.
Should front and rear shocks use the same oil weight?
Same weight works fine for casual crawling. Hardcore crawlers run stiffer oil up front and softer oil at the rear to avoid nose dive on climbs.
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Verdict
The factory 30mm metal oil shocks of the YIKONG YK4061 RC Car are a capable stock set. Casual users can run them as-is. Inspect seals regularly for light use and keep the 26030 rebuild kit for rocky trails. Upgrade shock bodies or springs only when the shaft is damaged or extra weight overwhelms stock damping. （Word count: ~595）