QS165/Sur Ron Razor Belt Kit
QS165/Sur Ron Razor Belt Kit
Couldn't load pickup availability
Notes
- NEVER HAMMER ANYTHING ON YOUR BIKE WHEN INSTALLING THE KIT.
- Stock Razor rear wheel required for the 79T aluminum rear pulley. If you have a different wheel or want a custom gear ratio I can 3d print a pulley for any hub with an 80t h25(stock razor), 48t 420(stock sur ron) sprocket, or #35 sprockets upon request.
Installation
Check out this amazing video*
*note tension is measured in kg, not lbs. Please see this page for detailed instructions regarding belt tension.
There is also an installation guide. Be sure to check out the installation guide for generic installation tips. Note this guide is designed for the v2 belt kit but most of the advice and tips still apply. Please note: damage from improper installation will not be covered in any way. Be sure to read through this carefully.
Marketing BS
Tired of cleaning chains or that piece of shit tensioner? Want to stealth around without Karens bitching at you because of that noisy chain? Me too. That's why I started using belts on all of my bikes back in 2021. I immediately fell in love. I had to share this discovery with others. So, I quit my job and racked up a bunch of debt. I have no regrets and I am truly proud of what I was able to create. I am sure you'll love using a belt instead of a chain as much as I do.
Tough as Shit
The belt kit has been designed from the ground up to be tough as shit. The front pulley has been CNCed out of a single block of 304 stainless steel. The rear pulley has been CNCed out of a huge ass block of aluminum.
Pros and Cons
Pros
- Quiet
- No maintenance
- Clean
- Long-lasting belt life
- Smoother power delivery
Cons
- Initial price. Over the kit's lifetime, the savings from chain replacements, lube, and maintenance will make the overall price of the belt kit lower.
- Hardcore off-road dirt bikes use chains. Doing a full-throttle wheel spin while in the air and then landing hard puts a lot of strain on the drivetrain and can lead to a belt snap. If you plan to do this note that belt snaps won't be covered and you should opt for the more durable aluminum rear pulley.
- Can’t do low tooth count front pulleys.
Features
- Quieter than chains
- Rust-free stainless steel and aluminum pulleys with stainless hardware
- Easy install using basic tools and an angle grinder
- Maintenance free
- Smooth power delivery
Motor Compatibility
This specific kit only works with surron style motors such as the QS165, stock surron, or any upgraded aftermarket motor such as ko, ebmx, sotion, torp...
If you have a different motor, check out the rest of the products, and if you can't find one that works for you hit me up. I have a bunch of kits for a bunch of different motors.
Gear Ratio Overview
Understanding your Razor Bike's gear ratio is key to predicting its torque and top speed. The Kit comes with the following pulley sizes:
- Rear Pulley: 79T aluminum or 78T plastic
- Front Pulley: 23T
This results in a gear ratio of 3.43 (79/23). If you run low amps this may feel sluggish so just run more amps 😉.
Weight
Total: 583g
- Rear pulley: 392g aluminum
- 936 Belt: 97g
- Front: TBD
What's Included?
- Front pulley(optionally)
- Rear pulley
- 16mm belt
- Hardware marker- this can help to make sure none of the bolts or nuts come loose. Use this on the motor shaft nut.
-
Krikit(belt tension tool thingy)
- 316 A4 Stainless steel hardware
- 4x20mm countersunk m6 bolts
- 4xm6 nuts
- 1xm8 reverse threaded nut(goes on the motor shaft)
- 1xm8 washer
Belt Tension Tool
Want to know how much tension is on your belt? The best way I have found is to use the Krikit. All kits with Electro & Company or custom extension will include this tool for free. The instructions and video for how to use the Krikit are on the product page.
Welded or Fixed Freewheel Required
We require all belt kit customers to have a fixed or welded freewheel. If you do not, we will not be able to cover any broken components such as motors, wheels, frames, etc... I am not just saying this because I sell welded freewheels. I have to sell the welded freewheels because many beta testers and customers have found that the stock freewheel doesn't last long and causes extreme drivetrain ware and failures. The stock freewheel was not intended to have the level of power you push through your bikes. Trust me, weld that freewheel!
If you do not already have a welded freewheel and would like to add one to your order, get it for 50% discount when ordering with a belt kit. This discount will apply automatically on checkout.
Shoutout to Tatoosh Sky for the pics 🤘.
Questions?
How do I install it on my bike?
Check out the installation guide
Regen?
Absolutely. Just be sure to not overheat your motor and weld your freewheel.
SX vs MX?
The MX and SX have the same distance from the motor to the rear wheel so the belt length is the same.
What about all the other Razor models?
With a bit of work you can put a belt kit on the following razors:
- MX350
- RSF350
- MX400
- Pocket Mods
- Dirt Quad(Probably)
Let me know what model of Razor you want a belt drive kit for by filling out this form.
What about the old chain tensioner?
Try to unscrew it. I didn't have much luck unscrewing mine so i just cut the bitch out.
What about the old freewheel?
Freewheel stays but needs to be fixed/welded. The rear pulley mounts on to the freewheel just like the old sprocke. Highly recommended using a welded freewheel as this reduces wear and tear on your drivetrain drastically.
Should I worry about snapping a belt?
One time I snapped a belt while testing the limits of the belt's tension. Under normal tension the belt should not snap or skip. If you hear skipping you should check the tension on your belt. Be sure to check out our installation guide for proper installation techniques.
Does it squeek in the rain like my car belt?
No. Only v-belts do this. Timing belts don't slip or squeak even when soaking wet.
Mud?
Not so much with the V1 kit. The V2 kit has slots for debris to pass through the pulleys if you do a lot of mud trails.
What is better for off road riding?
For hardcore off road riding where sticks and shits gets in the gears chain may be better. Most hardcore dirt bike riders use chains. Probably for a good reason. I am working on a tool free belt replacement option that may work well for this scenario.
How did beta testing go?
International shipping?
Yes. Please contact us for details. Taxes and duties are a bitch but doable.
International shipping costs, taxes, duties and fees are never covered by beltsNshit even if we make a mistake and send you the wrong or broken product. Do not place an order if you are not accepting of these terms.