Hello, Nas, my name is Aaron
I have not faced too many probs with my engine....
(Except that BLOODY pull starter!!!!
Anyway, I order my parts from Hong Kong, they are very cheap!
If you are interested I will give you more details!
If the car is dirty...
A). The race area may be dirty.
B). Inside engine may be dirty.
C). Engine rejecting the fuel.
D). Fuel may be spraying everywhere due to fuel/air leak.
I will help you out, soon with the engine!