RMS
Description
Premium Vespa Starter Button Switch
Don't let a sticking, corroded, or sun-faded handlebar switch keep you from hitting the road. This premium aftermarket starter button switch restores that crisp, factory-fresh tactile click and immediate electrical connection required to fire up your motor. Engineered as a direct drop-in replacement, it cures the common headache of intermittent starting issues caused by dirty internal contacts or weather damage.
Key Features
OEM-Spec Matching: Manufactured to mirror the precise dimensions, spring tension, and shell molding of factory part number 638975.
Direct Fit Integration: Slips smoothly into your existing handlebar cover (headlight headset) with zero cutting, filing, or custom modification needed.
Plug-and-Play Connectors: Features the correct terminal pin configuration to plug right into your scooter's factory wiring harness loom.
Weather-Resistant Housing: Constructed from durable, UV-stabilized polymer to prevent fading, cracking, and water intrusion from rain or washing.
Fitment Guide
| Brand | Model | Engine Compatibility |
|---|---|---|
| Vespa | GTS 250 / 300 / Super / GTV | All 250cc & 300cc Variants (Including HPE) |
| Vespa | LX 50 / 150 | All Model Years & Engine Configurations |
| Vespa | LXV 125 / 150 | All Model Years |
| Vespa | S 50 / 125 / 150 | All Model Years |
| Piaggio | Liberty 50 / 150 | Modern 4-Stroke & iGet Variants |
| Piaggio | Fly 50 / 150 | All 2-Stroke & 4-Stroke Generations |
Technical Specs
Manufacturer Part Reference: High-Quality Aftermarket / Replaces OEM 638975, 582989
Component Type: Handlebar Control Starter Switch Assembly
Terminal Type: Multipin plug block for factory loom integration
Material: UV-stabilized ABS plastic with high-rebound internal spring
Package Contents: (1) Replacement Starter Button Switch
Maintenance Note: Modern Vespa handlebar switches are highly exposed to the elements. If your starter button only works when you mash it down forcefully, road grime and rain have likely oxidized the internal copper contact plates, signaling it is time for a complete replacement.
Installation Tip: When popping the old switch out of the handlebar housing, use a plastic trim tool or wrap a flathead screwdriver in electrical tape. The painted headset plastic chips easily, and a gentle tool prevents scratching your matching body paint.
Pro Tip: This identical switch housing is widely used across the entire Piaggio and Vespa lineup for other functions too. If your electronic seat release button (the saddle pop switch) or your horn button is acting dead, this exact same part number is frequently the correct replacement!
WARNING: California Proposition 65
Product Diagrams
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
