9,000 rpm, stage 4, predator 212 non hemi racing motor build tutorial! 

It’s nice to see young guys in to motors especially doing performance upgrades. 👍

I work at Dynocams grinding cams for gocart motors we have all different types of cams from stock to wicked. If your lookin for something to make a lot of power i can grind you one and send it your way on my dime. Also we have a machine shop and any part you need for your motor. Thanks devin.

Get the spring seat cutters from NR Racing or Studz. Good job on the head, the short turn should be a radius, not a drop off, best way to kill the velocity in the head is to hack away at the floor where it makes the turn, round it over, dont lower it. Same goes for the exhaust.

I love the way you welded up the two holes that are perfect for adding a PCV... you could have done what I did and drilled out and tapped the oil sensor hole and put a 90 degree fitting in there and run it to a PCV, the top hole could be done the same... and that stops you from blowing out gaskets and having all the oil blow out the pcv in the rocker cover

Not bad my guy! Definitely fun little engines to mess with.

Use old valves to protect valve seats when porting. Can use puddy to check valve clearance.

You guys know your stuff!! Keep up the good work!!👍

My 212 just needs to port the gead & polish exhaust. I have billet rod & flywheel, mod 2 cam, exhaust & filter. Im getting a slide carb soon. Did 61mph. Going to see how much more i get with the ported heads & carb.

I want the predator that was revving in the back ground before the welding scene...lol

see if a local machine shop can install 5.5mm valve guides so you can use your stainless steel valves, or just buy a different head from OMB that already comes with 5.5mm stems

Helps to clean up for oil return.

You end up selling this motor to a cart guy out of Redding CA? I almost bought it off of him but got a bit concerned it was raced pretty hard at that point so backed out. Nice work gentlemen. 👌🏼🙃

Question what exact rod are you using And what cam are you using And how is the motor holding up? Thx yall are the best

Sheesh I thought I couldn’t port I feel a lot better now🤣🤣

Did you measure piston in the hole? If so what did you have? What cam did you use?

Turn the music off so we can hear what you're saying, geez man!

Love the socks

If your welding up the holes, why don't you cut the bosses off first so it looks better? Did you fit a spacer to crank after removing the governor gear? (not sure about crank shape, never done a Predator motor) You left the edges where valve pocket was machined too sharp. Put it under the kitchen tap in direction you want flow and see where flow is breaking up from sharp angles. (not ideal but gives you an idea) Air won't 'turn' more than about seven degrees so do that part (the bowl) first and don't worry about the carb side of port as much You were trying to explain fuel drop out, with an 80 grit finish the rougher surface promotes turbulent boundary layer flow which will break up any fuel droplets. Where are the dowels to locate head gasket and head? (19.08 minutes) You can see gasket is way off center compared to bore. When you do valve adjustment, it's easier (for 0.003") to use a 0.004" feeler and make sure it doesn't fit, then you know it can't be larger than about three and a half. Why do you have 'breathers' that can't do anything? Running them into exhaust pipe as an extractor would be better than nothing. No wonder the 'stage 1' at beginning was showing oil leaks around gasket and filler. I think your way out with your estimate of 20bhp, a Honda XR200 with a 240cc kit can only make about 22bhp before blowing up around 13,000rpm If your promoting this as a tutorial, try and get things right

Damn you got some wealthy parents

What are the main components to make engine run on higher speeds without destroying it self?

Glad to see youngsters playing in the garage, I was getting worried about ur generation.

You need a check valve inbetween valve cover and catch can

Idk if u installed bronze valve guilds . I didn’t and they dropped . Lucky nothing bad happen. It did hit 9550 rpm’s Though .

What cam are you guys running?

that a 24mm pwk? what you end up jetting wise? pilot jet size? build looks great you stick with the 26 lb springs or upgrade

I did 3 things to my predator 212cc hemi motor removed the governor and added a torque unit and a performance muffler and it tops out at 74 mph

Why would you weld the side of the motor. Its far more important that the thing cools off at a good rate. The block will overheat and seeze the rotating assembly before it comes apart

Forgot the head guide for head and gasket

nah bc i was on stage 3 on my hemi 212 i should’ve js kept it instead of selling it😭

What welder is that you're using to weld aluminum

what was the size of that piece metal you welded onto the block?

330 cam wha makes the bike dips

I'm building a 420cc predator motor with nitrous

Oil vents aren't going to do anything like that either

Lift the gas tank above the motor next time.

I think you forgot the dowels on bottom 2 head studs

You know the hemi head is better, and ypu can use vlone parts in there. Like all the clone parts. Cams and everything from a clone. So that way you can get betwr cams, springs crankshaft, rods, and all

Can barely hear you cause of the music...

Why did you guys replace the studs for the sidecover and then use the allen bolts? 😂

Not stage 4. Stock big cam? Uhh what size? An thats not making 20hp. Probay 11 hp

Don’t waste your money with a 308 cam I took mine out and I put a fire t265 in. A 265 cam with 1.3 ratio rockers will put you around 345 lift.

Your music is distorted, it is hard to understand what you are saying.

only 26lbs? you should run some 36lbs

Do all your modds and come race me I'll smoke that thing

This is not a stage 4 build😭

Just give a coat of spraypaint

Get a 330 cam cuz tha a stock cam

That's not 20 dude it's not even 15

Why would you even weld them you obviously don't know what your doing because I sure didn't weld them and they don't leak

They are Engine’s not motor’s motors are Electrical.!!!! Why people call them motors I’ve no idea… Engine’s are internal combustion…..

Annoying background music

Talk about weight reduction 😅