Provides Stability for your Crankshaft

About quality and texture:Precision-machined aluminum with a clean anodized finish. Everything feels solid and fits perfectly with OEM tolerances.About the feeling of use:Noticeable improvement in engine smoothness at higher RPMs. Reduces crankshaft flex and adds confidence during spirited riding or tuning.Products to buy together:Recommended with Takegawa High Camshaft, reinforced oil pump, and clutch kit if you're going full performance.Difficulty of installation:Moderate. Requires side cover removal and some mechanical experience. Not for total beginners, but manageable with the right tools.Cost performance and comparison with other products:More affordable than a full bottom-end build. Compared to other brands, Takegawa maintains a strong reputation for reliability and long-term durability.About shipping and packaging:Arrived securely in standard Takegawa packaging. No damage or deformities. Fast delivery from Webike as usual. Any concerns, cautions, or advice when purchasing:Ensure compatibility with the JB03 model (not older Monkey 125 versions). Double-check runout clearance and torque specs during install.Final thoughts:A smart investment if you're upgrading your Monkey 125 for performance. It adds engine longevity and peace of mind—worth every yen.View Detail

About quality and texture:The machining is precise with a solid anodized finish. Threads are clean, and the adapter feels heavy-duty and durable in hand.About the feeling of use:Provides excellent stability during crankshaft operations. Keeps the crankshaft perfectly aligned and prevents unwanted movement.Products to buy together:Recommended to pair with a crankshaft installer/remover tool or a complete engine rebuild kit. Also useful with a high-quality torque wrench.Difficulty of installation:Very easy to use—threaded fitment is smooth. No special skills required, but should be used with care.Cost performance and comparison with other products:Not the cheapest option, but the quality justifies the price. Superior to generic adapters in both fit and longevity.About shipping and packaging:Shipped quickly with Webike’s usual efficiency. Packaging was secure with no damage on arrival.Any concerns, cautions, or advice when purchasing:Make sure this matches your engine model. Double-check compatibility—some variants may require different shaped adapter.Final thoughts:Highly recommended for engine builders or anyone doing crank work. A reliable and well-made part that gives peace of mind during critical operations.View Detail

I installed it on my JB03, and it fits perfectly without any issues. This part works as a reliable safeguard that helps prevent crankshaft distortion, which can occur under heavy load or high RPM. For anyone looking to add an extra layer of engine protection, I can definitely recommend this upgrade.View Detail

this fourth bearing kit holds the crankshaft more stable. Can tell the difference around 8-9k rpm. The bike does not feel that shaky at that point.View Detail

About quality and texture - The oil fill cap O-Ring from SP Takegawa is made from soft rubber, the quality from the overall fit and finish is perfect.About the feeling of use - An O-Ring that was necessary for me to purchase when piecing together parts for my engine maintenance as the original O-Ring was weeping oil onto the clutch cover from the oil fill cap.Products to buy together - Key products to purchase when carrying out your own engine maintenance for the 12,000 km service is a spark plug and the regular drain plug washer and oil filter for the SP Takegawa clutch cover.Difficulty of installation - The installation of the oil fill cap O-Ring is an simple task that took 0.1 of an hour to complete. Common sense is all that is required to secure the O-Ring to the oil fill cap on the SP Takegawa clutch cover.Cost performance and comparison with other products - I find the cost of all the products SP Takegawa sell to be on par when compared to what most other companies sell their products for and the oil fill cap O-Ring is no different.About shipping and packaging - With there being no cost difference between sea freight and EMS for the oil fill cap O-Ring, I chose EMS for an earlier arrive date. The part was extremely well protected while being covered in bubble wrap and surrounded with air pillows in a sturdy cardboard box.Any concerns, cautions, or advice when purchasing - Webike Japan is the first place I look to for all my motorcycle needs. From service parts to performance products and even motorcycle gear and apparel, Webike always seem to satisfy my needs in regards to availability and pricing.View Detail

About quality and texture:The build quality is solid, with a clean weld finish and durable coating. It feels sturdy and well-engineered to handle the weight of the JB03 Monkey without flexing.About the feeling of use:Super convenient for chain maintenance, tire checks, or upright parking in tight spaces. Provides excellent balance and feels secure when the bike is lifted.Products to buy together:Consider a rear fender eliminator or compact side stand for added clearance. Rubber pad or garage mat helps prevent slipping on smooth floors.Difficulty of installation:Moderate — it bolts directly to the frame with minor effort. Some mechanical experience is helpful, but overall installation is manageable in under an hour.Cost performance and comparison with other products:Compared to OEM or imported center stands, MotoSkill offers similar quality at a better price. It’s not the cheapest, but the design and stability justify the cost.About shipping and packaging:Well-packed and arrived without any scratches or missing hardware. Webike's delivery was fast and reliable as always.Any concerns, cautions, or advice when purchasing:Ensure compatibility with aftermarket exhausts or swingarm mods — some setups may interfere. Check clearance when folded.Final thoughts:A great functional upgrade for any JB03 Monkey owner. It improves maintenance convenience and bike stability without sacrificing aesthetics. Recommended!View Detail

About quality and texture:The quality is excellent — welds are clean, and the carbon muffler has a premium finish. The materials feel durable, lightweight, and well-crafted overall.About the feeling of use:Noticeable improvement in throttle response and mid-high range power. The sound is deep and aggressive without being obnoxious. It turns heads but doesn’t drone during long rides.Products to buy together:Recommend pairing with a fuel controller or ECU remap for best performance. A new exhaust gasket might also be needed depending on your bikes agel.Difficulty of installation:Fairly straightforward for anyone with basic mechanical knowledge. Bolts on cleanly without modification. Instructions are clear with photos, it's doable within 1 hour.Cost performance and comparison with other products:Compared to other full systems like Yoshimura or Akrapovič, the Hot Lap offers solid performance and aesthetics at a more affordable price. Great value if you want style + performance.About shipping and packaging:Arrived quickly from Webike. Well-packaged with plenty of protection — no damage or missing parts.Any concerns, cautions, or advice when purchasing:Check compatibility carefully before ordering. Carbon can discolor over time if not cleaned or maintained, especially with high heat.Final thoughts:If you want a high-mount system that boosts performance, sounds great, and looks aggressive, this Hot Lap 520 is a solid pick. Great balance between price, performance, and style.View Detail

About quality and texture:Flawless chrome finish with a deep shine—typical Takegawa quality. The welds are clean, and the overall construction feels solid and precise.About the feeling of use:Feels sturdy when used to move or lift the bike. Also adds a nice aesthetic touch to the rear end. Doesn’t flex or rattle while riding.Products to buy together:Pair it with a matching Takegawa side rack or seat for a clean, cohesive look. Also works well with aftermarket fenders.Difficulty of installation:Very easy—direct bolt-on with no modifications needed. Took about 20 minutes with basic tools.Cost performance and comparison with other products:Pricier than some other branded options, but the finish and fit are noticeably better. Worth the extra cost if you care about quality and appearance.About shipping and packaging:Arrived well-packaged with protective wrap to avoid scratches. Webike shipping was fast and reliable as usual.Any concerns, cautions, or advice when purchasing:Fits all models of Monkey 125—some users might need to make a slightly adjustment to the instructions depending your rear shock absorber setup.Final thoughts:A great functional and visual upgrade. Adds both utility and a polished look to the bike. Highly recommended for those who value both form and function.View Detail

About quality and texture:The springs are well-made, with a consistent finish. Feels durable and properly hardened—typical high Kitaco quality.About the feeling of use:Clutch engagement is firmer and more responsive, especially under load or high RPM. Reduced slippage noticeably. Great for tuned engines or spirited riding.Products to buy together:Recommend pairing with a reinforced clutch plate and a cable injector to luvricate your clutch cable for the best results.Difficulty of installation:Moderate. Basic tools and mechanical knowledge are needed. Be cautious with spring compression and clutch cover gasket.Cost performance and comparison with other products:Excellent value. Cheaper than full clutch kits but provides a real improvement and is probably all that you really need. Compared to Takegawa and SMR springs, Kitaco offers similar performance at a lower price.About shipping and packaging:Fast shipping via Webike as usual. Springs were securely packed with a backing card and sealed plastic wrap.Any concerns, cautions, or advice when purchasing:You can adjust the spring rate to match your bike setup—too stiff may affect daily usability, so be careful when sellecting the amount of 60% springs you install.Final thoughts:A worthwhile upgrade for the cost. Improves clutch feel and reliability without breaking the bank. Ideal for light mods or preventative maintenance.View Detail

About quality and texture:Excellent craftsmanship as expected from Takegawa. The stainless bezel and clear lens give it a premium look. The gauge feels solid and well-sealed—no signs of cheap plastic or loose components.About the feeling of use:Reads smoothly and accurately. The 12,500 RPM range is ideal for tuned 4-stroke engine on your Monkey 125 build. The needle movement is responsive, and the face is easy to read even in daylight.Products to buy together:Recommended to pair with a Takegawa compact LED thermometer for a temperature display. A windscreen would also help with streamline the cockpit area.Difficulty of installation:Fairly easy for those with basic wiring experience. Clear instructions included, and the wiring is straightforward due to the included plug and play harness.Cost performance and comparison with other products:More expensive than generic tachs, but the accuracy, durability, and styling are worth the premium. It integrates better with high-quality builds.About shipping and packaging:Well-packed by Webike, arrived with zero damage. Bubble-wrapped and boxed securely as usual.Any concerns, cautions, or advice when purchasing:Ensure compatibility with your model Monkey 125. It’s small, so double-check gauge mounting space.Final thoughts:An excellent, compact tachometer for riders who want both performance and looks. Highly recommended for custom or high-rev builds where precision matters.View Detail