49cc Gas Powered 4 Stroke Engine 5/8" Shaft

Item: 4S-58ENG

Regular price: $169.99

Our price: $149.99

3.86/5 (224 votes)
Already have a mounting kit for your bicycle and need to purchase the engine only? We have what you need. The new EPA approved Hua Sheng F142 49cc 4 stroke engine is compatible with the Grubee Whopper Stopper Stage II and stage III mounting kit.
At approximately 2.5 HP this bicycle engine gets about 100 to 150 mpg and can hits speeds of 35 MPH or more. 4 cycle engines require little maintenance. Simply add gas and oil and the engine is ready to operate. Make regular oil changes and your engine will last you for many years to come.

  • 5/8" keyed shaft
  • Stock muffler
  • Gas tank not included
  • Clutch not included

Engine Specifications:

Engine Type

Air-cooled 4-Stroke OHV Single Cylinder

Max Power(kw/r/min)

1.5 KW / 2.5 HP / 6800

Fuel Consumption(g/kw·h)


Fuel Consumption(L/h)




Net Weight(kg)




Fuel Tank Capacity(L)


Oil Capacity(mL)


Ignition System


Compression Ratio




Starting System




Package Dimensions(mm)



  • Engine TypeAir-cooled 4-Stroke OHV Single Cylinder
  • Max Power(kw/r/min)1.5 KW / 2 HP / 6800
  • Fuel Consumption(g/kwh)≤480
  • Fuel Consumption(L/h)0.78
  • LWA(dB(A))101
  • Net Weight(kg)7
  • Displacement(cc)49.1
  • Fuel Tank Capacity(L)--
  • Oil Capacity(mL)250
  • Ignition SystemTCI
  • Compression Ratio7.4
  • CarburetorFloat
  • Starting SystemRecoil
  • Approximate DimensionsHeight - 9 1/2", Width - 11", Length - 9"

What Customers Are Saying

49cc Gas Powered 4 Stroke Engine 5/8" Shaft
49cc Gas Powered 4 Stroke Engine 5/8" Shaft
3.86/5 (224 votes)
  • edward daigle
    i would like to buy the engine with out the kit
  • abelardo loyola
    engine only
  • The Mecanic
    It's not bad for a Chinese clone. This engine is based on the Honda GXH50 and it has all the same parts only its made entirely in china with a few very minor changes. The thing that is most problematic with this engine is the carburetor. It started having constant carburetor float level problems after its first start up.

    I ended up switching to an NT carburetor using an adapter on the manifold. The Carburetor included on the engine needs serious re-designing to make it reliable and the fuel line connector really should be pointing vertically up not horizontal for better fuel flow and easier tank mounting for custom applications. It also really needs a primer button like 2 stroke carburetors have to help with the float problems.

    Other than the badly designed carburetor, it runs pretty much just as well as the Honda version. I was able to hit 30 mph (48.28 kmh) easily on my bike. The one other thing I wish they would also improve on is the quality of the bolts. I ended up stripping one of the bolt heads holding the muffler cover on now I cant get it out without cutting off the plastic cover.