Yamaha PW-X3, PW-S2 & PW-XM motors (incl. YDX Moro 07)Not for PW-X, PW-X2 or older Yamaha motors, or Giant SyncDrive.
Speedbox 3.3 for Yamaha PW-X3 / PW-S2 / PW-XM eBike Tuning Kit
Speedbox 3.3 for Yamaha PW-X3 / PW-S2 / PW-XM eBike Tuning Kit
In stock
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- UK stock, tracked worldwide delivery
- 30-day returns, Lifetime Warranty
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DIY Install
Plugs into your existing wiring, nothing permanent. Video guide included.
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Removes 15.5mph limit
Switch between standard and tuned mode at any time.
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Not sure it fits?
Check your bike in our Kit Finder → or send us your make, model and year.
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Real UK support
A real person helps by email or WhatsApp if you get stuck.
Unlock the full potential of your Yamaha powered eBike with this eBike tuning kit. Works seamlessly with any Yamaha PW-X3, PW-S2 or PW-XM motor. It removes the 15mph or 20mph factory speed limit, allowing you to enjoy faster, unrestricted rides. Once fitted, it can be switched on or off at anytime using the handlebar controls. You can read our full review here
✅ Removes factory speed limit completely
✅ Plug & ride — no specialist tools
✅ Stealth install, completely hidden
✅ Accurate speed & distance
✅ Lifetime warranty included
Looking for a tuning kit that pairs with your phone? Don't miss this premium bluetooth version
Click here to access a full install video for this kit. Please note, this product is not compatible with;
- Yamaha PW-X / PW-X2 / PW-SE / PW-ST / PW-TE / PW-CE motors (shop here)
⚠️ For off-road use only. Not legal on public roads. Read full legal disclaimer.

Frequently Asked Questions
Will this work with my eBike?
- Works with any eBike fitted with a Yamaha PW-X3 / PW-S2 / PW-XM Motor
- Also works with Yamaha YDX Moro 07 & Moro 05
- Not compatible with any Giant brand eBikes
Why choose this tuning kit
Here's why riders love this tuning kit
- Fitted to the motor in minutes for a true plug & ride experience
- Completely removes 15mph restriction, also works with US spec ebikes with 20mph limit
- Full use of the display, with accurate speed/distance in kmh or mph
- All ride modes work exactly the same, including ‘walk mode’
- Lifetime warranty with all Speedbox tuning kits
What is your shipping & returns policy?
🇬🇧 UK
Free delivery to the UK with Royal Mail Tracked 48. Tracked 24 is available as a paid option.
🇺🇸 USA
Free shipping on all orders, takes 5-7 business days.
Your parcel is exported from the UK and handed to USPS for final delivery.
All tariff charges and import paperwork is handled by us. No surprise customs bills on arrival.
🇦🇺 Australia
Free shipping on all orders, takes 7 business days. WA takes 14 days.
Parcels are delivered by Australia Post once they reach your local network.
We manage all import paperwork, so you won’t receive any unexpected fees.
🇨🇦 Canada
Shipped from the UK with full tracking via Royal Mail. Delivered to you by Canada post.
Canadian orders are subject to import duties or customs charges on arrival.
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Changed your mind? No problem. We offer 30-day returns — no hassle, no stress.
If something’s not right, we’ll sort it.
🔍 See full Shipping & Returns info here
How to avoid error codes
Unfortunately no tuning kits are 100% guaranteed. You can reduce the risk of triggering an error code by following these simple steps:
If your eBike uses a smartphone app, switch off automatic updates before installing your tuning kit
Remove your tuning kit before doing any software updates
If possible, remove your battery before starting your installation
Keep your average speed below 50km/h
What's covered by the Lifetime Warranty?
All Speedbox products come with a lifetime warranty. In the unlikely event your product develops a fault or defect. We will replace it for free.
To claim under warranty, simply contact us here
A note on Firmware Updates
Updating your eBike’s motor firmware may block or disable your tuning kit.
We recommend avoiding firmware updates—especially through service centres—unless absolutely necessary. Most updates are optional, and a working eBike doesn’t usually need one.
Keep in mind:
✔ Firmware upgrades can remove tuning compatibility
✔ Tuning is only guaranteed to work with the firmware version available at time of purchase
✔ A blocked tuning kit due to a firmware update is not covered under warranty
If you’re unsure, reach out before updating. We’re here to help you keep your ride running exactly how you like it.
The single most important upgrade for Yamaha ebikes hands down. These bikes are heavy and without assist extra heavy. Highly recommend SpeedBox for the quality and easy installation.
Works great, no speed limit now
Works as promised
Very good bit of kit my bikeis a completely different ride now the power difference is amazing and you can feel the difference in the ride
1.To improve the product I would colour code the instructions, while there’s lots of on line videos I’d rather have the diagram on the instructions with the wires coloured rather than them all grey.
2. Apart from peddling I have no indication the unit is working/turned on. It would be good to have some form of led indication in the interface x.
Installation Guide:
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