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Now back in stock!


New at California Motorbikes!


Introducing the Phantom 85. The first true 85cc 2 stroke engine built for motorized bicycling. More than 2 years in the making this exclusive new engine has been redesigned to be the most powerful and reliable bicycle engine available.


The Phantom boasts a 52mm bore, redesigned, single piece cylinder combined with a 40mm stroke that makes this the biggest, fastest, most powerful bike engine you can buy. The bike engine kit comes standard with an upgraded CDI, the latest performance Speed carb, a reed valve, a double window piston, and a brand new class of high-end exhaust.

Testing has shown the ZTMoto 85 to deliver well over 3 HP. More powerful than the so called 100’s, faster than the Dio’s, the Phantom delivers high end performance right out of the box.

We also know that along with performance motorized bike riders demand durability. That’s why we made sure to include a ceramic coating on the inside of all the Phantom cylinders. This process, often seen in the racing industry, extends the life of the cylinder, reduces friction and heat, and helps improve overall engine performance.


New Phantom 85 Features Include:

  • 52mm Bore, 40mm Stroke - Actual U.S. engine displacement: 85cc
  • Single piece cylinder and head (Lower operating temps, increased rider weight capacity, improved power output across varied rpm range)
  • High performance Speed carb
  • Reed Valve (Controls air-fuel mixture flow to increase performance)
  • Ceramic lined cylinder (Significantly improves cylinder durability, reduces friction, lowers operating temps, increases performance)
  • All new ultra-quiet exhaust pipe
  • Oversized exhaust port
  • High performance CDI with Yamaha components
  • Performance magneto
  • High end allen bolts
  • Improved gas cap

ZTMOTO Phantom 85 Complete Engine Kit Includes:

  • 85cc 2 stroke engine with one piece cylinder and head
  • Reed valve air intake
  • Needle bearing for piston wrist pin
  • High performance Speed carb
  • Angled LD Z8C spark plug
  • Performance magneto
  • Stainless steel allen bolts
  • Better balanced crank
  • Upgraded bearings / 60% thicker crank case around bearings
  • Stuffed crank case
  • Large intake port (40mm bolt hole width)
  • Oversized round exhaust port - 28mm diameter, 60mm stud spacing
  • 40mm crank stroke (more powerful, efficient, and reliable)
  • Double window piston
  • Long rod (89mm)
  • Larger 8mm x 1.25 engine mount studs
  • Approximate engine dimensions: 9" x 9" x 5"

Mounting Kit & Accessories Included:

  • High performance CDI with Yamaha components
  • Black tear drop gas tank (2L) w/ new fuel cap, fuel valve, fuel filter, and fuel line
  • 415 Heavy duty chain with chain guard
  • Ball bearing chain tensioner
  • Ultra quiet muffler (Stainless steel with sound insulation cotton inside)
  • Throttle assembly w/gooseneck style throttle cable
  • Twist throttle and cable with matching grip and kill switch
  • New quick release clutch handle
  • Large front mount for bicycles that have large down tubes
  • Available with 36, 44, or 48 tooth rear sprocket
  • Spark plug socket tool and gear removal tool

Fuel/Oil Ratio

  • New Engine (<310 miles): 20:1
  • After Break In: 25:1


Gasoline operated products are NOT compliant with Environmental Protection Agency ( E.P.A. ) or California Air Resources Board (C.A.R.B) for the use on/off Public roads. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and NOT for on/off public roads.

Phantom V3 85cc Engine Kit

$299.00 Regular Price
$249.00Sale Price
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