Stroker Engine Build: 30+ HP on a 65 MPH Mini Bike! (Complete Build)

Ever wondered what putting 5x more horsepower onto a mini bike would do? Check out the Honda gx390 performance mods build video that goes over the big block engine swap from the forged piston, billet rod and crank on the bottom end, to the black venom ratio rockers, heavy valve springs, 3 stage header, and flat-slide mikuni carburetor on the top end. Plus a little bit of riding at the end.
*PARTS USED IN THIS BUILD*
Honda GX390 Engine https://amzn.to/2zQIOrW
GX390 Starter https://amzn.to/2uxHdCl
Predaotr 420/Gx340/390 Billet Connecting Rod http://bit.ly/2mqzp0I
Honda Gx390 1.2 Ratio Roller Rockers http://bit.ly/2LpKfPr
90mm -.050" compresison height piston http://bit.ly/2uIlp6o
GX390 +.200" (70mm) stroker crank http://bit.ly/2uLyGuT
GX390 Crank Bearings https://amzn.to/2JyefHh
GX390 Oil Seal https://amzn.to/2NlSxs0
GX390 Magnetic Oil Plug http://bit.ly/2NrT4ZL
90mm .043" head gasket http://bit.ly/2NYiyic
35mm Intake Valve http://bit.ly/2L7ij6G
31mm Exhaust Valve http://bit.ly/2zZx0Uz
Billet Retainer Kit For Valves http://bit.ly/2mulnel
GX240-390 & 301-420 50 lb HD Valve Springs http://bit.ly/2msY98K
Rotating Assembly Balanced by NR Racing
GX390 Valve Lifters https://amzn.to/2L6lifW
GX390/420 275 Camshaft http://bit.ly/2No1LEs
GX390 Crankcase Cover https://amzn.to/2Jzynso
GX390 Gasket(s) https://amzn.to/2uxT1Ez
GX390 Valve Cover Spacer http://bit.ly/2uLAFPR
Cut To Length Push Rods http://bit.ly/2mthxT2
Mikuni TM32 Flatslide Carburetor https://amzn.to/2Ltf9q5
Billet 32mm Intake Manifold http://bit.ly/2LtYjHG
GX390/Predator 420 Exhaust Header http://bit.ly/2uHhdDV
40 series Torque Converter Kit http://bit.ly/2Nsg7U2
Billet Thumb Throttle https://amzn.to/2zQHh5a
Adjustable Throttle Cable http://bit.ly/2JzAL2k

*TOOLS & CONSUMABLES USED IN THIS BUILD*
Piston Stop https://amzn.to/2NZNxKN
Degree Wheel https://amzn.to/2zPQXwD
Timing Light https://amzn.to/2uxhMAX
Gasket Maker https://amzn.to/2uxU8Ef
Bearing Puller https://amzn.to/2mrjGOP
Plastigage https://amzn.to/2moGJKm
12 Point Socket Set https://amzn.to/2L2yiTH
torque wrench https://amzn.to/2L82pJu
Feeler Gauge https://amzn.to/2NYzBkl
Assembly Lube https://amzn.to/2NWIMlc
Dremel Rotary Tool https://amzn.to/2muFnxE
Carbide Rotary Burrs https://amzn.to/2O1Tp6n
Dial Indicator https://amzn.to/2zLZNLS
Green Grease https://amzn.to/2uwq3F4
Valve Lapping Compound https://amzn.to/2O13DnM
Valve Lapping Tool valve_lapping_tool
Isopropyl Alcohol https://amzn.to/2mpX9lz
50ml Class A Burette https://amzn.to/2L3Ojsp
Micrometer https://amzn.to/2uxvKTo
Mill https://amzn.to/2L9rHHi
Piston Pliers https://amzn.to/2zRgc1R
Piston Ring Compressor https://amzn.to/2uv9NEk
Dry Erase Marker https://amzn.to/2uxY4ov
Caliper https://amzn.to/2NZlQlt
Abrasive Chop Saw https://amzn.to/2uxsB5Y

*Compression Ratio Calculator*
http://bit.ly/2zSEOas

*Free Go Kart Plans*
https://kartfab.com/go-kart-plans
GET MORE KARTFAB
http://www.youtube.com/c/kartfab
Instagram: https://instagram.com/kartfab/
Like KartFab: https://Facebook.com/KartFab
Follow KartFab: http://Twitter.com/KartFab
KartFab Google+: https://plus.google.com/+KartFab
Rock Intro 3 by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Artist: http://audionautix.com/

Видео Stroker Engine Build: 30+ HP on a 65 MPH Mini Bike! (Complete Build) канала KartFab