For the TOP line have 8 new engines, all engines are developed from a long line of experience and expertise in making the best possible engines that are available today.

2 of the 8 new TOP engines are made in the 2,1cc size.
They are both very similar to each other but one has a sleeve with 3 transfer ports while the second has a sleeve with 5 transfer ports.

Some other specifications&features are:
T12LT3/M:
- Strong&Stiff alloy crankcase;
- High quality steel crankshaft in STD type;
- ABC type sleeve with 3 transfer ports;
- Casted alloy piston for a long life;
- 5,4mm rotary carburetor with single adjustment;

T12LT5/M:
- High quality steel crankshaft in STD type;
- Casted alloy piston for a long life;
- ABC type sleeve with 5 transfer ports;
- 5,4mm rotary carburetor with single adjustment;
- Strong&Stiff alloy crankcase.

The remaining 6 new TOP engines are all made in the 3,5cc size.
All made with the well-known high standard for quality and precision.

T21-3M Features:
- 9mm rotary carburetor with an alloy body and in use mixture adjustment;
- ABC type sleeve with 3 transfer ports;
- High quality steel crankshaft in SG version;
- Efficient water-cooled cooling head;
- User-friendly STANDARD glowplugs.

T21-5M Features:
- ABC type sleeve with 5 transfer ports;
- Casted piston from alloy;
- High quality steel crankshaft in TURBO SG version;
- User-friendly STANDARD glowplugs;
- 9mm rotary carburetor with an alloy body and in use mixture adjustment;
- Efficient water-cooled cooling head.

T21-7M Features:
- 9mm rotary carburetor with an alloy body and in use mixture adjustment;
- ABC type sleeve with 7 transfer ports;
- High quality steel crankshaft in TURBO SG version;
- Efficient water-cooled cooling head;
- User-friendly STANDARD glowplugs;
- Strong&Stiff alloy crankcase.

TX21R1WC/MS Features:
- 9mm rotary carburetor with an alloy body and in use mixture adjustment;
- ABC type sleeve with 7 transfer ports;
- High power TURBO glowplug;
- High quality steel crankshaft in SG version;
- Efficient water-cooled cooling head with external purple anodizing.

TX21MR2/NS Features:
- Efficient water cooled coolinghead with external purple anodizing;
- High quality steel crankshaft in TURBO STD version;
- 9mm rotary carburetor with an alloy body and in use mixture adjustment;
- ABC type sleeve with 7 transfer ports;
- Water-cooled rear crankcase cover;
- High power TURBO glowplug.

TX21SSM2A4 Features:
- Efficient water-cooled cooling head with external purple anodizing;
- High quality steel crankshaft in TURBO STD version;
- 9mm rotary carburetor with an alloy body and in use mixture adjustment;
- ABC type sleeve with 7 transfer ports;
- User-friendly STANDARD glowplug.