Well the price is the issue.
The items can be purchased and shipped to my door for $247.16 from NR Racing.
I think GPS gives members here a 10% discount, however.
Besides that, The rod and flywheel are going to be good til like 12,000 RPMs.
Your cam is for 7000+ target RPM. So all gravy. The cam card suggests the 18 lb springs in the kit, so all good there. The cam suggests 32 degrees BTDC ignition timing. The ARC flywheel should be set for 32 degrees, so you should be all good there. The spark plugs eats up some combustion chamber volume so that will bump the compression ratio a bit.
The rest of the stock parts... pushrods, valves, retainers, lifters,... should all be fine at 7000 RPM.
I'm assuming you already have or know you need a less restrictive air filter and exhaust and need to richen up the carb jets as well to get the max benefits from the cam. Or another option is to just go ahead and upgrade the carb as well.
For that price they should throw in the air filter, air filter adapter, exhaust header, and jets.
Since the cam has a low lift (I think it has stock lift with a bunch of duration), you might consider a thinner head gasket to bump compression. Or, since getting a billet rod, you might be able to fit a longer one. Just keep Minimum 0.050" piston to valve clearance and minimum 0.025 - 0.030" piston to head clearance.
ADDED: I don't have any experience with the MOD2 cam. It will probably hurt the low end up bit, but should make up for it in the top end. I think it is a very popular cam. It's a cheap option. Like $40 from DynoCams. Maybe somebody with that cam can chime in as to how it performs.
BTW... Is this going to be a racing go kart? Or a stop and go fun kart?
