The Bomb Moto B2 is making waves in the electric dirt bike world, offering riders a customizable, high-performance chassis for building their dream e-moto. Launched by Bomb Moto LLC, a California-based company, the B2 is designed for intermediate and adult riders seeking torque, speed, and affordability. Unlike complete bikes, this rolling chassis lets you add your own battery, controller, and throttle, giving you control over the build. As of June 22, 2025, the B2 is gaining popularity despite supply chain challenges. Here’s everything you need to know about this exciting DIY platform.
What is the Bomb Moto B2?
The Bomb Moto B2 is a rolling electric dirt bike chassis with a powerful QS120 V3 motor, built for riders who want to customize their ride. Larger than its sibling, the B1, the B2 suits adults and experienced riders, with a 31.9-inch seat height and 17/14-inch wheels. Priced around $1,199, it’s an affordable base for a high-performance e-moto, reaching speeds of 50 mph+ with a 125A tune. You add the battery, controller, and throttle to match your needs, making it a favorite for DIY enthusiasts. Bomb Moto’s focus on quality and value has sparked buzz, though tariff issues are delaying restocking. We’ll update you on availability.
Key Features
The B2 boasts a lightweight aluminum swingarm, adjustable 1,000 lb rear shock, and moto-spec brakes. Its QS120 V3 motor offers 13kW peak power, delivering strong torque and acceleration. The chassis supports clean wiring and aftermarket parts, with a 428H chain and durable plastics. It’s sized like a 125cc trail bike, perfect for trails or fire roads.
Why DIY?
The B2’s DIY design lets riders choose components like Fardriver controllers or Bomb Moto’s 72V, 36Ah battery for tailored performance. This open-source approach saves money compared to pre-built bikes like Surron, while allowing upgrades for speed or range. It’s ideal for those who love tweaking their ride to fit their style.
Build and Performance
The B2’s build quality and performance set it apart in the DIY e-moto scene. Its steel frame and forged triple clamp ensure durability, while the unsprung mid-drive motor reduces wear and boosts torque. With a recommended 125A constant tune (150A peak), it delivers thrilling acceleration for trails or urban rides. Riders report 50 mph+ top speeds with the right setup, though range varies around 20+ miles depending on conditions. The B2’s hydraulic brakes and adjustable suspension handle rough terrain well, but some users note the stock chain may need upgrading for aggressive riding. Supply chain issues persist, but Bomb Moto is working to restock. Check back for updates on performance tweaks.
Motor and Power
The QS120 V3 motor, with 4,900 rpm peak and internal gear reduction, provides excellent torque. Riders can push 13kW with a 150A controller tune, though Bomb Moto suggests 125A for reliability. This setup rivals pricier e-motos, offering power for jumps and climbs without breaking the bank.
Handling and Ride
The B2’s 17/14-inch wheels and 12-inch ground clearance make it nimble on trails. Its 1,000 lb rear shock and 48mm front forks with 170mm travel absorb bumps well. At 31.9 inches, the seat height suits taller riders, though some over 6’2” suggest aftermarket adjustments for comfort. It’s a solid all-around performer.
Challenges and Criticisms
Not everything about the B2 is perfect. Some riders on Reddit report quality issues, like weak stock chains snapping under hard use, requiring upgrades to heavier chains. The brakes, while moto-spec, have been called weak by aggressive riders, and proprietary parts can make replacements tricky. Tariff and restocking delays have frustrated buyers, with Bomb Moto’s site noting limited stock. Others compare it unfavorably to cheaper Chinese 125cc bikes, citing higher costs after adding components (around $2,500 total). Despite this, many praise its value for DIY builds. Bomb Moto is addressing feedback by improving parts availability. We’ll update you on stock and quality fixes.
Component Quality
A Reddit user in January 2025 criticized the B1’s chain and brakes, and similar concerns apply to the B2. The #35 chain can break under stress, and some riders upgrade to a 428H chain. Brakes may need aftermarket pads for better stopping power, especially for heavy trail use.
Supply Chain Issues
Tariff hikes and restocking delays have limited B2 availability, with Bomb Moto’s site warning of updates via email. This has frustrated buyers eager to start builds. The company, based in California, is navigating global supply chain challenges but hasn’t shared a clear restocking timeline yet.
Community and Customization
The B2’s DIY appeal has built a strong community of riders sharing builds on platforms like Reddit and YouTube. Enthusiasts like those on r/hyperebikes praise its open-source design, recommending Fardriver 72450 controllers or VESC kits for custom tunes. Bomb Moto supports this with resources like manuals and trusted suppliers for parts. Riders often swap tips for boosting torque or range, with some hitting 15kW bursts. The community’s creativity shines, from custom seats to upgraded motors like the Sotion FW11. Social media posts on X highlight B2 builds tearing up trails. As the community grows, expect more mods and guides. We’ll keep you posted on new customization trends.
Popular Upgrades
Riders often upgrade to Bomb Moto’s 72V, 36Ah battery with a Bluetooth BMS for real-time monitoring. Others add Fardriver controllers or aftermarket shocks for better handling. Custom seats from Bolts & Volts improve comfort, while stronger chains and sprockets boost durability for rough rides.
Community Feedback
On Reddit, users like u/CMDRfatbear discuss building fast B2s with 5kW motors for torque. Others, like u/Combbrushmush, warn about quality but note the community’s support helps. X posts show riders sharing build videos, with many praising the B2’s versatility for trails and fire roads, especially for adults.
What’s Next for Bomb Moto B2
Bomb Moto B2 is working to resolve supply issues and improve component quality, with plans to restock the B2 soon. The company may explore complete bike models but remains focused on DIY for now. Community feedback is driving upgrades, like stronger chains and better brakes. The B2’s popularity is growing, with demand high for its affordability and power. As tariffs ease, Bomb Moto expects smoother shipping from its California hub. Riders are hopeful for new accessories and controller kits to enhance builds. We’ll update you on restocking dates and any new features or community builds as they emerge.
Future Upgrades
Bomb Moto is testing enhanced chains and brake pads to address criticisms. A potential B2 battery upgrade with higher amp-hour capacity could extend range beyond 20 miles. Community-suggested features, like adjustable handlebars, may also appear in future models to suit taller riders.
Availability Updates
With restocking delayed, Bomb Moto urges customers to join their newsletter for updates. Social media hints at new inventory by late summer 2025, but no firm dates are confirmed. The company’s focus on quality control may push timelines but aims to ensure better builds.
