Buggy GY6 conversion to Predator

[SUBMAWEINER]

I recently got a Trailmaster for my kids for very cheap. The Previous owners kids blew up two GY6 motors in a relatively short period which I discussed in my introduction thread. I bought the buggy for $100 and decided to try to go with a Predator 212 setup conversion.

A quick list of what I plan on modifying and have on hand/plan on installing:
Removed the GY6 style engine today.

Predator 212 engine
Removing Governer.
30-75 Torque-A-Verter
Upgraded carb TCT mech fuel injection
Stage 1 upgrade
-intake
-header
Predator motor mount/ adjustable engine mount. To be welded once mock up is complete.

The TAV comes with both:
12T #35 sprocket part # 3504
10T #41/40/420 sprocket Part # 202168

My questions:
Which sprocket of the two above is recommended to use if any? The current one installed from the previous engine is a 38 tooth sprocket. The smaller sprocket is 13 tooth.
What else will I need to get this thing going?

The wheel size of the buggy is 16” and the weight is around 300lbs. Again new to this, want something for my 5 and 9 year old to play with and learn about engines and building basic skills for them. Thanks fir the help.

 

[itsid]

420 is the beefiest chain of the aforementioned and what I personally would go with
so 10T TC
and you'll need a 60T axle sprocket for 420 chain as well of course..
that should work for up to 500lbs of total weight (200 lbs worth passengers)
if you need to move more weight, 4 additional teeth per 100 lbs should be okay.

I still think that's the wrong plan as we already discussed.
since you lose power, speed, e-start, lights and reverse.
and the time to modify the kart in order to mount the industrial engine,
isn't any less than it'd take to fix one of the two engines you already have.
And I doubt it's cheaper really.

But it's your kart and your decision to make,
I just wanted to be sure to have that mentioned once more.

So what else will you need apart from engine and TC..
aforementioned axle sprocket that matches your hub (and the 420 chain),
some steel plate to fab a motor mount (a drilled/slotted plate.. don't buy one.. make one!),
a welder to weld it to the swingarm with some basic tools to prepare and line up the welds
and primer and paint to blend it in afterwards.
Good planning to make sure the engine isn't hitting the rack under compression of the suspension, still lining up with the axle sprocket etc.

'sid

 

[SUBMAWEINER]

Thanks, for the help. Prior to removing the engine, I found a large crack in the bottom of the engine along with a big piece of the casing missing and tweaked. Speaking to the previous owner, The other engine on the bench was attempted to be rebuilt but, had other internal issues so he decided to purchase the current one that is broken and installed.

I purchased a set of LED lights and wiring harness which work great via a toggle switch installed already. My welding skills are non-existent but I have several skilled friends volunteering to assist do hopefully it isn’t too complicated.

I looked at the current chain installed and it’s a 420 chain. Is there a reason I cannot use the 38 tooth axle sprocket vice a mentioned 60T? I apologize for all the newb-dumb questions and appreciate the assistance. I plan to post all the mock and install pics over the next few days.

 

[Budget GoKart]

The 38 tooth is too small your gearing will be too high