Product Details
Blue Line SAIC / PAIR / PCV / EGR Emissions Block Off plate kit for 50cc 139QMB and 125cc and 150cc GY6 4-Stroke Engines. This kit allows you to block the emissions port in your cylinder head if your emissions system is leaking or for performance applications. This is commonly done when installing an aftermarket exhaust system.Specifications:Block off Plate with 30mm hole spacingGasket2 Mounting BoltsNOTE:You may need to reroute the vacuum lines on your carburetor and/or switch to a single vacuum port intake, using a non-emissions head cover, depending on the model.This product is intended for off-road use only.This product is not intended for use on public roads or land.This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.*Performance upgrades are considered racing parts and are not covered by warranty.WARNING: California’s Proposition 65
Sold Individually or in Packs of 10
Includes Block-Off Plate, Gasket and Hardware
Bolt Spacing: 30mm
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Additional information
| Weight | 0.05 lbs |
|---|---|
| Dimensions | 2.5 × 3 × 1 in |
| Size | 10pcs |
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 50cc, 125cc, 150cc, GY6, 4-Stroke
- Engine Code: 139QMB
- Fitment Notes: Performance
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a 139QMB engine?
A: This SKU is listed as compatible with 139QMB engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Is this for 50cc scooters?
A: This SKU is listed with 50cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.05 lbs |
|---|---|
| Dimensions | 2.5 × 3 × 1 in |
| Size | 10pcs |





