Overview Reviews Product Description SSP-G 52mm BIG BORE RACING HEAD FOR 50cc QMB139 MOTORS 50cc QMB139 4-STROKE 52mm, PERFORMANCE CYLINDER HEAD. INTAKE VALVE DIAMETER: 21.5mm INTAKE PORT DIAMETER: 24mm EXHAUST VALVE DIAMETER: 18.9mm EXHAUST PORT DIAMETER: 22mm VALVE LENGTH: 62.3mm (COMPATIBLE WITH 64mm SHORT VALVE STYLE HEADS) DOES NOT INCLUDE CAMSHAFT, PLEASE SEE RELATED ITEMS PLEASE NOTE: REPLACES CYLINDER HEADS WITH 64mm VALVES (SHORT VALVE STYLE) MADE IN TAIWAN Product Videos Custom Field Product Reviews Write a Review Write a Review × SSP-G SSP-G 52mm BIG BORE RACING HEAD FOR 50cc QMB139 MOTORS Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *
Quick view Details SSP-G | sku: 169-518 SSP-G 50MM QMB139 BIG BORE CYLINDER & HEAD KIT MSRP: Now: $194.95 Add to Cart Quick view Details SSP-G | sku: 169-444 SSP-G QMB139 50cc - 100cc ADJUSTABLE RACING CLUTCH MSRP: Now: $39.95 Add to Cart Quick view Details SSP-G | sku: 169-351 SSP-G 52mm BORE *93cc* QMB139 CYLINDER HEAD & CYLINDER BASE GASKET SET MSRP: Now: $11.95 Add to Cart Quick view Details NCY | sku: 1100-1435 NCY BIG VALVE RACING CYLINDER HEAD (52mm, 88cc) FOR QMB139 MOTORS MSRP: Now: $145.95 Add to Cart SALE Quick view Details NCY | sku: 1100-1248 NCY BIG BORE CYLINDER KIT (52mm BORE, 88cc) FOR QMB139 50cc ENGINES MSRP: $140.00 Was: $140.00 Now: $130.00 Add to Cart ×
Quick view Details SSP-G | sku: 169-444 SSP-G QMB139 50cc - 100cc ADJUSTABLE RACING CLUTCH MSRP: Now: $39.95 Add to Cart Quick view Details SSP-G | sku: 169-351 SSP-G 52mm BORE *93cc* QMB139 CYLINDER HEAD & CYLINDER BASE GASKET SET MSRP: Now: $11.95 Add to Cart Quick view Details NCY | sku: 1100-1435 NCY BIG VALVE RACING CYLINDER HEAD (52mm, 88cc) FOR QMB139 MOTORS MSRP: Now: $145.95 Add to Cart SALE Quick view Details NCY | sku: 1100-1248 NCY BIG BORE CYLINDER KIT (52mm BORE, 88cc) FOR QMB139 50cc ENGINES MSRP: $140.00 Was: $140.00 Now: $130.00 Add to Cart ×
Quick view Details SSP-G | sku: 169-351 SSP-G 52mm BORE *93cc* QMB139 CYLINDER HEAD & CYLINDER BASE GASKET SET MSRP: Now: $11.95 Add to Cart Quick view Details NCY | sku: 1100-1435 NCY BIG VALVE RACING CYLINDER HEAD (52mm, 88cc) FOR QMB139 MOTORS MSRP: Now: $145.95 Add to Cart SALE Quick view Details NCY | sku: 1100-1248 NCY BIG BORE CYLINDER KIT (52mm BORE, 88cc) FOR QMB139 50cc ENGINES MSRP: $140.00 Was: $140.00 Now: $130.00 Add to Cart ×
Quick view Details NCY | sku: 1100-1435 NCY BIG VALVE RACING CYLINDER HEAD (52mm, 88cc) FOR QMB139 MOTORS MSRP: Now: $145.95 Add to Cart SALE Quick view Details NCY | sku: 1100-1248 NCY BIG BORE CYLINDER KIT (52mm BORE, 88cc) FOR QMB139 50cc ENGINES MSRP: $140.00 Was: $140.00 Now: $130.00 Add to Cart
SALE Quick view Details NCY | sku: 1100-1248 NCY BIG BORE CYLINDER KIT (52mm BORE, 88cc) FOR QMB139 50cc ENGINES MSRP: $140.00 Was: $140.00 Now: $130.00 Add to Cart