This engine is the second attempt I had of building a 3.5cc glow TBR engine, trying to improve the overall look and finish, along of course with the performance. The engine retains much of the original design with the addition of cooling fins to the top of the cylinder head. Cylinder porting has also been changed to a single exhaust port,  schnurle style transfer porting with an improved intake duration.

While I am happy with the end result of this engine with regards to the look and feel of it, there is still a lot of room for improvement in the weight and power output of the design. Although this engine starts and runs much easier and is a much more docile engine to handle overall with good power I do feel there is still a lot more in there to get out and I,d like to see a reduction in size dimensions as well as weight.