ZTMoto Phantom 85 V3 - Complete 52mm Bore 2 Stroke Motorized Bicycle Engine Kit - True 85cc Bike Motor
- SKU:
- ENGJL-ZTP*
- Installation:
- Assembly Instructions
Phantom 85 Version 3 is back in stock! New cylinder design eliminates ring snag while optimizing the size of the intake and transfer ports to deliver maximum power. Limited stock available.
ZTMOTO 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
All Phantom 85 kits now include needle bearings as a standard option. If you own an older version that uses a bushing and wish to perform an advanced custom modification to replace the bushing with a needle bearing, then please see this blog post by Alexander Nave:
https://motoredlife.myshopify.com/blogs/news/installing-needle-wrist-pin-bearings-in-the-phantom-85
Installation: ZTMoto Phantom 85 Installation Instructions | Cylinder Assembly Instructions | Cylinder Assembly Video
Troubleshooting: 2-Stroke Troubleshooting Guide
42 Reviews Hide Reviews Show Reviews
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What can I say I love the phantom 85 motor great motor great price
Thanks bicycle engine's. Com for your great customer service one of the few companies these days who actually answer the phone when someone calls and you stand behind your products Thanks for being a great company
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insane engine if you have experience and more money.
this is most definitely not a first-time builders engine you will absolutely kill yourself. basically, before I even ran the engine I took the whole thing apart and put in good quality timken 6202-rs bearings for everything because most of the bearings came pre-shot from the factory and needed to be replaced anyway, balanced the crank, replaced the crank seals, (this was a gen 2 phantom so i had to do the needle bearing mod too) then cleaned and greased everything. after you get the engine good to go then you need to make sure you have a solid bike frame, a Walmart beach cruiser will not cut it, I am 80% sure this engine could destroy a Walmart bike. you need to make sure you have a good way to mount it on the hub, I used a hub adapter but I drilled and threaded one side of it and ran a bolt through it, and also ground a flat spot on the hub so that there was no chance the hub adapter would move, this worked. I find a 36-40 tooth sprocket pairs well with this engine because it has a ridiculous amount of power. you will also 100% have to retard the timing quite a bit unless you are a racer or else this thing sounds like a gun going off and I would replace the carb with a pz20 or similar along with a g2 reed valve and stuffer. if your are an experienced builder on the hunt for more power with the time, money, and patience to monkey around with this then buy it 100% it has so much power. I cant even imagine what it would be like ported and with an expansion chamber. frankly, this engine scares me.
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Phantom 85
Motor would be good if I could get a needle bearing for it, I have the v2 bushing but dont want to run it until I can at least purchase the latest bearing for it
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Great customer service
My boyfriend bought the Phantom 85. He loves it. It had some issues and we contacted customer service who resolved it quickly. Still needs a needle bearing and hopefully they will become available in the near future.
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Phantom 85
This motor is bad ass I just wish the wrist pin bearing was wider so the piston wouldn't move side to side. Or maybe bore out the hole in the piston and connecting rod so you guys could use the same wrist pain bearing from other motorized bike motors
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Still 5 stars
I still give them a five star rating even though 3 parts was missing awesome customer service and will be purchasing from bicycle engines. Com for my next kit or parts need thanks team the our working at bicycle engines
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Successful Maiden & Shakedown Runs
Despite the uncertainty of new bronze bushing durability I ordered this kit, Finished frame up build last night; Ran couple heat cycles & shakedown runs so far, so good! Excited to lean out fuel mix & needle setting after first couple tanks of gas; wonder how it will run @ 40:1 !!
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Phantom 85
So far I'm satisfied...money well spent ..already thinking about buying 1 more...to be cont...
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Phantom 85
Powerful engine, destroyed rear hub in 3 days. Even though I have heard that could have been not enough grease from factory. Huffy cranbrook. Pretty easy installation, vert little cleaning up of casting. Only one issue. The carb, leaked very bad. Upon inspection. The flange that holds gasket in place us very thin. A peace about 1 inch crackwd off on straight part of it and a small piece in the corner. Very thin casting around the bowl. Other then that very pleased with the rest of the kit
Videos
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The Phantom 85 V1 by ZTMoto. The largest bike engine on the market! First look and tear down
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ZTMoto Phantom 85 (Most Powerful Stock Motorized Bike Kit)
This is the worlds most powerful STOCK direct bolt on motorize...
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ZTMoto Phantom 85 Bushing Removal & Installation
Quickly and easily remove the stock ZTMoto Phantom 85 wrist pi...
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Motorized Bikes 101: Engine Top-end Assembly 49cc 66cc 80cc 100cc
How to put together a motorized bicycle engine top end! Step b...
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