Which 5000w motor? | Endless Sphere DIY EV Forum

Hi guys, I'm pretty green when it comes to most of this stuff but I've been reading a lot and I find that doing instead of reading actually helps me learn and understand the technology better. Unfortunately there are no bike shops in my area that work on anything custom, builds, or really anything not off the shelf so trying to talk to someone in person isn't really an option. That said, I purchased a s73 clone that came with some sort of w 20" hub motor, a Sabvoton Svmcm controller and 72v43ah battery (unsure of the make or much more information regarding the battery). I also have another bike that I purchased/gave inputs on the design from a manufacturer, in China, that I was hoping to potentially build a few models to iron out the kinks and then produce models for sale. That didn't happen and the manufacturer is completely silent on any after sales support but enough on that. The bike came with a 3kw motor that I fought tooth and nail with the manufacturer to upgrade to a 5kw which never happened, I was also never given the specs on the controller but I do have 2 72v batteries that came with it. The frame, l love, but the 3kw motor isn't going to cut it for what I want (I was told it was tested before it shipped @60mph but I'm calling BS on that as I can't get it to hit more than around 40mph) I mention both bikes because I want to buy a setup (motor/controller) that I could potentially use on either bike, and a setup that has great off the line speed from 0-30 say and a top speed of around ~55mph. (As a side note, going forward I'll refer to them as the blue bike (72v, SVMC, w motor) and the yellow bike (3kw, 2 72v batteries, unknown controller)).

My plans were to initially upgrade everything on the blue bike, but I'm still trying to work out some issues with the current setup, one of those issues being that the top speed (unloaded) is only showing that it will do around 40mph loaded (i've never actually gotten it out on the road due to having to replace most of the bikes accessories). I definitely do not think the controller is setup properly and the person who put it together knows even less than me so asking for his assistance has been pointless. So I'm going to go through setting up the controller from scratch and see if that helps.

But my real point for this thread is trying to find out what the best solution would be to get near the numbers I posted earlier while spending ~$1k or less if possible. If that's not possible, what should I expect with $1k put towards a motor and controller? I've looked into QS 5kw 3.5t and 100a Sabvoton controller but after reading a few posts here and on FB, I'm starting to have doubts about what to buy. I've tried discussing this with the reps over at NB power and I guess I'm getting on their nerves and asking too many questions so they basically just give me one word answers and don't help me.

So to start, should I be looking at a 5kw motor? If so, which one (specifically which model)? And then which controller? I've heard good and bad about Sabvoton and FarDriver and based off of my questions, I'm guessing most people are probably going to suggest I go with Sabvoton as they are easier to use. Personally I don't care about PAS so FarDriver is an option.

Please help! And yes, Ive read some discussions that are very similar to this topic but sometimes products change or newer better models come out so I figured I would ask again. Thanks!

W and W electric motorcycles differ in power, speed, and application. A W motor suits urban commuting with moderate speeds (35–45 mph) and longer battery life, while a W model excels in off-road or high-speed scenarios (50–65 mph) but requires frequent charging. Choose based on terrain, riding style, and budget.

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What Are the Power and Performance Differences Between W and W Motors?

A W motor delivers sufficient power for city rides and light off-roading, prioritizing efficiency over raw speed. In contrast, a W motor provides higher torque and acceleration, ideal for steep hills, heavy loads, or aggressive riding. For example, a W bike can climb 30° inclines effortlessly, while a W motor struggles beyond 20°.

How Does Speed and Range Vary Between W and W Models?

W motorcycles typically reach 35–45 mph with a range of 40–60 miles per charge. W models achieve 50–65 mph but consume battery faster, reducing range to 25–40 miles. Riders prioritizing distance should opt for W, while speed enthusiasts may prefer W despite shorter range.

Speed and range are also influenced by factors like rider weight, tire pressure, and terrain. For instance, a W motorcycle carrying a 200-pound rider on hilly roads may see a 15-20% reduction in range compared to flat terrain. Battery chemistry plays a role too—lithium-ion packs in W bikes often maintain consistent voltage for longer, whereas high-drain W systems experience faster voltage drop under heavy load. To optimize range, some manufacturers implement regenerative braking, which recovers 5-10% of energy during deceleration.

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Model Top Speed Range (City) Range (Off-road) W 45 mph 55 miles 35 miles W 65 mph 38 miles 22 miles

Which Motor Is More Cost-Effective: W or W?

W motorcycles cost $2,000–$4,000, offering lower maintenance and energy costs. W bikes range from $4,500–$8,000 with higher battery replacement and charging expenses. Budget-conscious riders save long-term with W, while W suits those needing premium performance.

Beyond upfront costs, consider component wear—W motors require more frequent chain replacements and brake pad changes due to higher torque. A typical W battery ($400–$600) lasts 1,200 cycles, while a W pack ($800–$1,200) degrades 30% faster under heavy use. Insurance premiums also differ: W models often cost $200–$500 more annually due to their classification as performance vehicles. For commuters riding 15 miles daily, a W bike’s annual charging cost averages $45 versus $110 for a W equivalent.

Are W Electric Motorcycles Legal on Public Roads?

Legality varies by region. In the U.S., W models often exceed street-legal power limits (e.g., 750W in some states) and may require registration as motorcycles. Always check local laws—W bikes are more likely to comply without restrictions.

What Are the Best Use Cases for W vs. W Motors?

W: Daily commuting, light trails, and riders valuing efficiency.
W: Off-roading, steep terrains, or high-speed highway rides. For example, HappyRun’s W City SUV excels in urban settings, while their W Ebike SUV tackles rugged trails.

Buying Tips

When choosing between W and W electric motorcycles, prioritize your riding needs. For urban commutes, HappyRun’s W models balance efficiency and affordability. Off-road adventurers should consider their W Ebike SUV, built for durability and power. Established in , HappyRun combines 9 years of expertise with eco-friendly designs. Visit their website for tailored recommendations and warranty details.

Expert Views

“The shift toward higher-wattage motors reflects demand for versatile electric bikes,” says John Carter, an e-mobility analyst. “While W models dominate off-road markets, W remains the sweet spot for city riders. Brands like HappyRun innovate by optimizing battery tech to mitigate range limitations, making high-power bikes more accessible.”

Conclusion

Choosing between W and W electric motorcycles hinges on terrain, speed needs, and budget. Analyze your priorities—efficiency versus power—and verify local regulations before purchasing.

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