Skip to product information
1 of 4

GoMax Industries

PK80+ 80CC, PK90+ 90CC, PK100+ 100CC Bicycle Engine Kits, 8mm Mount, Upgraded Magneto

PK80+ 80CC, PK90+ 90CC, PK100+ 100CC Bicycle Engine Kits, 8mm Mount, Upgraded Magneto

Regular price $159.00 USD
Regular price Sale price $159.00 USD
Sale Sold out
Shipping calculated at checkout.
The Plus Line of the PK Bicycle Engine Kits feature the Upgraded Magneto and Magnet.

Your choice of 80cc, 90cc or 100cc.

36 tooth rear sprocket is standard but 44 tooth, 32 tooth and 6 hole versions may be available upon request 
Include the Premium Performance Red BoFeng Speed Carburetor. With O Ring Seal and Revised Clamp Holds tight and does not allow leakage.
Enlarge Fuel Connector for Sure Fit
Quick Drain Reservoir for easy storage.
This performance kit includes ALL of the following:

ZL 40mm Rod Stamp or YD100 Rod Stamp
G4 Cylinder Factory Ported with Open Transfer Ports
Stainless steel Allen bolts
Enhanced balanced crank
Upgraded bearings + 60% thicker crankcase around bearings
Large intake port (40mm bolt hole width)
Round exhaust port
40mm crank stroke (more powerful, efficient, and reliable)
Type B piston (high wrist pin)
Long rod (89mm)
Larger 8mm x 1.25 engine mount studs
Mounting Kit & Accessories
Fuel tank w/fuel cap, fuel valve, fuel filter, and fuel line
415 Heavy duty Chain, and ball bearing chain idler
Standard chrome muffler
Twist grip throttle assembly w/gooseneck style throttle cable
New quick release clutch handle
Large front mount for bicycles that have large down tubes
Spark Plug socket tool and gear removal too
View full details

Collapsible content


Provide details like specifications, materials, or measurements.

Add an image in your Collapsible content settings for more visual interest.


Share expert tips on how to use this product or pair it with other items.


List the details of your shipping policy.