Why is the weight capacity on the Tritrack kit so low only 5 pounds can it be more?
We’re conservative with the specs. I’d rather have someone be surprised with performance rather than disappointed with overrated specs. Also the specs can be affected by the operating platform. Much more payload is possible in tile floor compared to carpet or asphalt. We can swap out the normal motors with more powerful ones if asked in the comments when you place the order. Be aware the price will be increased to reflect the difference of the stronger motors cost.
Also can if i order the ps2 tri track kit will you downgrade from a basica tom to a bs2 sw or whatever you offer at no extra cost. the basic stamp costs less than the basic atom
Yeah sure, if that what you really want. 
Just explain it very clearly on the order page.