BT100 V2 - Complete Electric Start 50mm Bore 2 Stroke Motorized Bicycle Engine Kit 100cc

Introducing the BT100 v2 electric start variant, which features the same high displacement cylinder as the BT100 v1 but is more durable and better cooling capacity. with the addition of a automatic centrifugal clutch, pull start, and electronic start. Making this engine very practical to start and without the worry of stalling.

Please be aware that beginners are not advised to use this engine kit.  Compared to other engine kits available on the market, it will require more time and be more challenging to install.  Before making the purchase, I would advise you to take a look at a few installation guides.  Because this engine kit is large, please make sure you have a large bike to install it on. You can also install the extended crank set that comes with this kit if necessary.

New BT 100 v2 ELECTRIC START VERSION Features Include:

50mm Bore, 40mm Stroke – 100cc (Actual U.S. engine displacement: 79cc)

Split cylinder, allowing aftermarket head upgrade and better cooling over single piece head.

Aluminum cylinder head with extra cooling fins, excellent heat dissipation

NT 19mm carburetor

Aluminum short air intake with Built-In Reed Valve

Cast iron sleeve cylinder (Significantly improves cylinder durability, reduces friction, ability to withstand high temperatures)

Oversized exhaust port

High performance CDI

Performance magneto

High end allen bolts

Improved gas cap

Centrifugal clutch

Electric start (Requires a 12v 7ah battery NOT INCLUDED)

Hand pull starter

BT 100 v2 ELECTRIC START VERSION Complete Engine Kit Includes:

100cc/79cc 2 stroke engine with 2-piece cylinder and head

Aluminum short air intake with Built-In Reed Valve

NT 19mm carburetor

Angled LD Z8C spark plug

Performance magneto

Stainless steel allen bolts

balanced crankshaft

Upgraded bearings / 60% thicker crank case around bearings

Stuffed crank case

Battery box with electrical wiring (Does not include battery)

Starter motor

Large intake port

Intake/exhaust gasket hardness increased

Oversized round exhaust port - 21mm diameter

40mm crank stroke (more powerful, efficient, and reliable)

Closed window piston

Long rod (89mm)

8pc mounting studs

Approximate engine dimensions: 12" x 10" x 10"

Mounting Kit & Accessories Included:

High performance CDI with Yamaha components

Black tear drop gas tank (1.5L) w/ new fuel cap, fuel valve, fuel filter, and fuel line

415 Heavy duty chain with chain guard

Ball bearing chain tensioner

Standard stainless-steel muffler

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 44 tooth rear sprocket

Spark plug socket tool and gear removal tool

The package, weighing 24 kg overall, will be shipped in two boxes combined:

A Box 39x29x29cm

B Box 39x29x29cm

IMPORTANT (Please read):

1.      In order to create a suitable steal on the intake and stop any air leaks, please do not remove the plastic insert or o-ring that comes with your carburator.

2.      An exhaust strapping kit will be included with every engine kit. Please use this to avoid exhaust snapping at welds alternatively, you can use a JB Weld Metal Strapping Kit.

3.      To prolong the life of these components, it is advised to clean and regrease the clutch arm, bucking bar, and bevel gear every few weeks.

4.      Fuel/Oil Ratio recommend by manufacturer: New Engine (500km or approx 3-5 tanks): 20:1 or 50ml of oil per litre. After Break In: 25:1 or 40ml of oil per litre.

Using a different oil ratio than what is advised may speed up engine wear and cause engine seize. Don't assume the ratios instead, use a two-stroke mixing container to measure the oil. Our engine kits come with a 30-day warranty from the date of delivery. If you use a different oil mix ratio, this warranty will be void.