You can use either 21 or 28 engine for 8T without any modification. If you are planning the 8T for leisure, then 28 will be alot fo fun since it will give you heaps of low end torque. However if you are planning for racing, 21 is the way to go, due to the fuel consumption of the 28 is alot higher. For example on the 8T with a 175cc fuel tank, it's easy to have 9 minutes run time for a 21, for 28 class, you are lucky to have 6 to 6.5 minutes.. |