Why is My 2018 Alta Redshift EX Dirt Bike Hard to Start?
Shop parts for a 2018 Alta Redshift EX Dirt Bike.
The 2018 Alta Redshift EX is a fully electric dirt bike, so when riders describe it as “hard to start,” the issue is fundamentally different from what a gas-powered machine experiences. There is no fuel system, no spark plug, and no compression stroke to troubleshoot. Instead, difficulty powering on the Redshift EX centers on the high-voltage battery pack, the motor controller, the electrical connections between components, and the software that manages the startup sequence. Understanding what “hard to start” means on an electric platform helps narrow the diagnosis quickly and avoid wasted effort chasing problems that simply do not exist on this type of machine.
Battery State of Charge and Cell Health
The most common reason a 2018 Alta Redshift EX resists powering up is a battery pack that has dropped below the minimum operating threshold. The lithium-ion pack uses a battery management system (BMS) that prevents activation when pack voltage falls too low, protecting the cells from damage that deep discharge can cause. If the bike has been sitting for several weeks without being connected to its charger, self-discharge alone can bring the pack below the startup threshold — even if it was left partially charged when parked.
Riders who store the Redshift EX during the off-season or between rides should maintain the pack at a partial charge and connect to the charger periodically to prevent the cells from drifting below their safe operating window. A pack that has been deeply discharged multiple times may show degraded cell health over time, which manifests as slow power-up behavior, reduced range, or intermittent activation failures. If the bike powers on inconsistently or displays voltage-related error codes on the dashboard, the pack condition should be evaluated by a qualified technician with the proper diagnostic equipment.
Contactor and Controller Communication
The 2018 Alta Redshift EX uses a main contactor — essentially a high-voltage relay — to connect the battery pack to the motor controller when the rider activates the bike. If this contactor is sticking, corroded at its terminals, or receiving a weak signal from the controller, the bike may require several activation attempts before it powers on fully. Corrosion on the contactor terminals or loose wiring connections between the controller and the contactor are the most common causes of this behavior, especially on bikes ridden frequently in wet or muddy off-road enduro conditions where moisture reaches internal electrical components.
If the Redshift EX occasionally powers up on the second or third attempt rather than the first, the contactor circuit and its wiring connections are worth inspecting before assuming a deeper issue with the controller or battery pack. Cleaning the terminal surfaces and ensuring all connections are tight and free of oxidation is a reasonable first step that does not require specialized tools.
Key Switch, Kill Switch, and Safety Interlocks
The 2018 Alta Redshift EX uses a key switch and kill switch as part of its startup safety interlock. If either switch is worn, intermittent, or not making solid electrical contact, the bike may appear hard to start when the real issue is simply a connection that is not fully engaging. A kill switch that has been exposed to repeated mud, water, or trail debris exposure can develop inconsistent contact over time, requiring the rider to toggle it several times before the system recognizes the correct position and allows activation.
The key switch on the Alta Redshift EX can also develop mechanical play after extended off-road enduro riding, which introduces intermittent contact in the switch mechanism. If turning the key does not consistently produce the expected dash illumination or system activation, cleaning the switch contacts with electrical contact cleaner is a straightforward first step. Replacement switches are available if cleaning does not resolve the intermittent behavior.
Firmware Initialization and Temperature Effects
Because the 2018 Alta Redshift EX is a software-controlled platform, it goes through a boot-up sequence each time it powers on. If the onboard firmware encounters a fault code, a sensor reading outside the expected range, or a communication timeout between modules, the startup sequence may stall or take longer than normal. Riders accustomed to instant activation may interpret a delayed boot as the bike being hard to start when the system is actually processing an internal diagnostic check before allowing full operation.
Cold ambient temperatures can also affect the initialization process. The BMS may require a brief pre-conditioning period before allowing the controller to draw full current from the battery pack, which can result in a bike that powers on but feels momentarily unresponsive. If the dashboard flashes error codes or takes an unusually long time to reach the ready state, documenting the specific codes and consulting a qualified electric motorcycle technician is the most efficient path to resolution.
Wiring Harness and Connector Integrity
Off-road riding on the 2018 Alta Redshift EX subjects the entire wiring harness to vibration, frame flex, impacts, and exposure to mud and moisture. Over time, connectors can work loose, pins can back out of their housings, and wires can develop micro-fractures at stress points that create intermittent connections. A loose ground wire or a partially seated connector can cause the Redshift EX to power up immediately on some attempts and require multiple tries on others, with no obvious pattern.
Inspecting the visible wiring connections after particularly rough rides is good preventive practice. Focus on the connectors near the controller, the main battery pack connections, and any harness routing points where the wires pass through or around frame members where abrasion is most likely. Riders who notice that startup difficulty coincides with specific conditions — such as immediately after a pressure wash or a particularly muddy session — should pay close attention to connector seals and apply dielectric grease where appropriate to keep moisture out of electrical contacts. For issues that persist beyond basic wiring inspection, professional diagnosis of the high-voltage system is the safe and appropriate next step.
Related Shopping Categories
Shop Battery Tenders for a 2018 Alta Redshift EX Dirt Bike.
Shop Lights & Electrical for a 2018 Alta Redshift EX Dirt Bike.
Shop Kill Switches / Engine Stop Switches for a 2018 Alta Redshift EX Dirt Bike.
Shop Batteries & Chargers for a 2018 Alta Redshift EX Dirt Bike.
Shop Dielectric Grease / Shop Supplies for a 2018 Alta Redshift EX Dirt Bike.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.
