Followup and stunting:

Why Overkill?

Because fuck you, that's why.

But for real, this kit can take anything you can throw at including a 500a noisy cricket or huge QS motor(qs and surron pulleys available) which is 100% overkill for these tiny bikes.  

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.  The old V1 kits are very susceptible to this but the V2 seems somewhat resilient to this abuse. 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 for enduro style riding. 
• Can’t do low tooth count front pulleys.
• Does not do well in deep snow. The snow builds up in the pulleys and can snap the belt.

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
• Slits for debris to pass through including mud and small rocks
• Easily removable front pulley using a crank arm puller
• Smooth power delivery

Motor Compatibility

• EC4P V3 only.  EC4P V1 and V2 require upgraded V3 shafts.  The V3 shaft has a darker color than the V1 and V2 shafts.
• MY1020(including Vevor and Kunray)
• The One
• Stock brushed motors

Not Supported

The following motors are not and will not be supported:

• KR5V
• FW11

• GTS11

Gear Ratio Breakdown

Understanding the gear ratio of your Razor Bike is essential for predicting its performance, especially in terms of torque and top speed.

Here's the rundown:

• Rear Pulley: Come in either 78 or 79 teeth.
• Front Pulleys: Come in either 13 or 14 teeth.

Belt kit ratios:

• The 14T front gives a ratio of about 5.64 (79/14).
• The 13T front offers a ratio of about 6.07 (79/13).

To put it in perspective with a #35 kit:

• If you have a 65T rear, the 14T front pulley's performance is similar to an 11.5T #35 sprocket.
• The 13T front pulley is similar to an 11T #35 sprocket.

These ratios hopefully give you insights into the torque and top speed you can expect from your setup. 

Weight

Total: 564g

• Aluminum rear pulley: 392g
• 936 belt: TBD
• Front
• 14: TBD
• 15: TBD

What's Included?

• Front pulley(14 or 15 tooth)
• Rear pulley
• 24mm wide belt
• Front Pulley Removal Tool- only for double d bore motors(not the one)
• Locktight to hold on the one motor shaft nut
• Hardware marker- this can help to make sure none of the bolts or nuts come loose.  Use this on the included motor shaft nut.  
• Krikit: included with all custom and Electro & Company extension kit orders. 
• File- for use on old beat-up motor shafts only.  Use with caution to file out imperfections only.  Most will never need to do this.  
• 316 A4 Stainless steel hardware
• 4x25 or 30mm countersunk m6 bolts
• 4xm6 nuts
• 1x reverse threaded motor shaft nut(goes on the motor shaft 304 A2)
• 1x motor shaft washer
• Optionally, 2xm12 washers- some arms need to be spaced slightly for clearance of the rear pulley.

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, frame, 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.  

Installation

Be sure to check out the installation guide.  Please note that damage from improper installation will not be covered in any way.  Be sure to read through this carefully.