Hi bro,

My car gear are standard, not modify at all, just buy & installed.

My suggestion is play everything with STANDARD first, until you feel that you yourself are ready to move to the modification stage....

IMO, a not proper modification method will never better than a STANDARD installation.

IMO A standard car can be smooth as below tips:

1) Ensure car chassis are fine.
2) Ensure motor output depend on track format. (More rpm less torque or more torque less rpm or both?)
3) Ensure current flow are good. Eg. battery contact, battery terminal, motor to terminal contact...
4) Ensure car moving parts are smooth & clean as possible. Eg. Gears, wheel bearing...
5) Ensure wheel shaft, wheels, tyres are straight & align as possible.
6) Ensure tyres are clean & oil free.
7) Ensure rollers are smooth & clean as possible.
8) Study front roller degree setting depend on track format.
9) Confident (Never give up)

All above just IMO.....Its just a basic knowledge to start with.

I also keep learning everyday....from TU senior member & in forum always.

For me always from a thinking to a questions, from a questions to a research, from a research to a development, from a development to a test, from a test to a success. (no short cut)
Hope my opinion did helps.

Many tks.

Cheers!

ehh .. u talking rough isit... this not /k so i wont flame you...

hmmm settle myth?? i not mythbusters..
well i can giv u 1 piece of advice.. if you want free parts... go wear worn or tear clothes.. go jump river.. then sit at TU there beg for parts 

the purpose "my car is slow" post on the beginning intend to encourage people to post more tips and info to share with newbie, seem only madey able to read his word....

so please post more tips 

cheer...