theres more too it than that, just adding rake to what you have will effect caster. for mx you would need to correct that
biggest issue jumping it is getting it in the air, long soft travel absorbs whatever you hit, so to really fly you have to nail something incredibly hard. the blue bike is designed for more all around riding, the red one has one mission, going straight thru whoops topped out in 6th gear
as fro stretching yours, what are you trying to achieve?? what is the bike doing that you dont want it to?? what is it not doing that you wish it would???
having that extra foot of bike out there definitly makes you a lot more secure at speed. I had a stock chassied blaster that handled incredible, but you always had a sense of impending doom going fast. sometime in the next couple days I will set you up with a fairly easy way to extend the stock frame. if you have decent fab abilities its fairly simple to extend if you don't mess with the rake.
having that extra foot of bike out there definitly makes you a lot more secure at speed. I had a stock chassied blaster that handled incredible, but you always had a sense of impending doom going fast. sometime in the next couple days I will set you up with a fairly easy way to extend the stock frame. if you have decent fab abilities its fairly simple to extend if you don't mess with the rake.
I would g with the tri z motor personally.