Predator 212 fly wheel is stuck

[Michaelmac3]

I have a Baja warrior mini bike that about a year ago I swapped the old engine out for a predator 212 and everything went fine a few months ago I took the coils out of the old engine to run the headlight off the predator when doing this I had to use the old engines fly wheel and magnetos and this went fine the predator has had the governor bypassed since it has been installed and recently I installed a stage one kit to it after about two rides it stalled out on my and now I can’t turn the fly wheel more than two turns does anyone know what could be wrong

 

[Michaelmac3]

I have checked and it is not hydro locked the push rods are in there seats and nothing is blocking the flywheel from turning

 

[redflash]

I'd pull off the side cover and look at the cam gears and other moving parts internally !

Da redflash

 

[Michaelmac3]

I have checked and it is not hydro locked and push rods are in place

 

[BaconBitRacing]

I have checked and it is not hydro locked and push rods are in place

Did you remove the side cover and head?

 

[Michaelmac3]

I'd pull off the side cover and look at the cam gears and other moving parts internally !

Da redflash

After pulling the side cover the only thing I can tell is that the piston stops at the top when it gets stuck but everything else looks fine

 

[Michaelmac3]

Did you remove the side cover and head?

I have not pulled the head

 

[BaconBitRacing]

I have not pulled the head

Well if it’s getting stuck at the top pulling the head seems like the next step.

 

[BaconBitRacing]

Could be a bent valve or something of the sort up in the head/top of the piston.

 

[Michaelmac3]

Could be a bent valve or something of the sort up in the head/top of the piston.

 

[Michaelmac3]

 

[Michaelmac3]

View attachment 138902

This would be the problem

 

[G.W]

Those bikes are sweet. I have a Massimo Carbon 6.5 with a 212 hemi and stage 1. It hauls. Here is a pick from when I went camping this weekend.

 

[Michaelmac3]

This would be the problem

Any suggestions on weather it would be easier to fix or just replace the whole engine

 

[G.W]

Any suggestions on weather it would be easier to fix or just replace the whole engine

Replace it. Try and get the hemi version. The valve covers look different.

 

[BaconBitRacing]

Replace it. Try and get the hemi version. The valve covers look different.

I’ve always heard non-hemis are easier (and cheaper) to get parts for. Either way great engines.

 

[Denny]

Get a non hemi. But pill that head first to see what failed.

 

[G.W]

I like the hemi better personally. It is supposed to make more performance and I can tell you it sounds better with a header than the regular.

 

[BaconBitRacing]

Get a non hemi. But pill that head first to see what failed.

My theory: rod let go or the plastic governor gear blew to pieces. @Michaelmac3 please do the engine autopsy, we want to see the damage so we can help others prevent it from happening.

 

[BrownStainRacing]

Hemi vs. Non-hemi???
It's your preference.

I see more destroyed hemi's. People don't pay attention to the piston to valve clearance, then add +.020" longer rod, .009" thick head gasket, a cam with more duration and lift. It only takes 1 time for that piston to touch a valve and it's done
Post in thread 'Engine suggestions' https://www.diygokarts.com/community/threads/engine-suggestions.47305/post-593992