Performance or stock?

[Not so mini bike]

I ripped apart what I believe is a h25 and found something's that don't look stock. Like everything.
Retainers, piston and rod, cam? It has an oil pump setup to lube the journey's where the cam sits on the side cover. Studs in block to bolt down head. Rod bearings. Looks like someone tried to polish the ports. But it has a gear or spline crane end. Didn't come with a flywheel. Any help would be great.

 

[Not so mini bike]

Rod appears to be aluminum. Magnet doesn't stick.

 

[CarPlayLB]

I got no help for you!...but that is bad ass! Billet rod? Oil pump? Head studs? Awesomeness! Does it have a steel bore too?

The Quarter midget racers used splined shaft for a reduction drive...maybe a racer modded this? Sure is cool! thanks for sharing!

 

[Not so mini bike]

I got no help for you!...but that is bad ass! Billet rod? Oil pump? Head studs? Awesomeness! Does it have a steel bore too?

The Quarter midget racers used splined shaft for a reduction drive...maybe a racer modded this? Sure is cool! thanks for sharing!

Magnet sticks to the bore.

 

[CarPlayLB]

Magnet sticks to the bore.

Rockin' little motor ya got there!

 

[Rupp 72]

Don't mean to jack the thread but what is the advantage of having head studs?

 

[Not so mini bike]

I would like think to hold the head down better

 

[JohnnyTillotson]

Got pics of this motor befor u took it apart? Curious as to what it looked like.

 

[Not so mini bike]

Not exactly

 

[Not so mini bike]

Welded hole and crank breather hole.

 

[Not so mini bike]

Back side

 

[fistfullabar]

Holy smokes!!! That thing is sweet! What going on with the oil pump? Looks like it runs off the cam? Sidecover looks made for the oil pump. Would the governor go there normally?

 

[Not so mini bike]

To be honest I don't remember seeing a hole for the governor to go through.

 

[CarPlayLB]

factory race engine? That's what I'd go with! Where'd you get that?

 

[Not so mini bike]

I got it from iron honkey

 

[OND]

Karl, got any pics of the cam ?

 

[Not so mini bike]

Just checked. It dose have a governor hole. It has a bolt in it.

 

[Not so mini bike]

Cam

 

[Not so mini bike]

More

 

[JohnnyTillotson]

Had to be a minibike racer. I dont see hoppin' up a 2.5 HP motor for a kart.