Are these aftermarket / better parts in my 5hp?

[Magice]

I've stripped down my 5hp to the block.. going to hone it clean up the baked on dirt, etc.

and have a few questions.

It WAS used in 5hp racing before.. is there any possibility the internal parts are after market? I have some crappy phone pics of them:

Cam:

Crank:

Rod:

Also, the bottom of the crank case is really scratched up - just under the oil dipper. Is that a bad problem?

Other than what is shown there are NO other markings on the cam and crank.

There is a 6 and something I can't identify (the motor is in the shop at school - cant see it now) on the crank.

On the cam there is no markings what so ever. Just what appears to be paint.

The rod has a 13 on it and that's it.

The motor does 5k rpm with springs limiting it.

 

[jr dragster T]

From the looks of it I dont see any racing parts. What led you to belive it was used in racing?

 

[Magice]

It came with my gokart and I know they raced on the track.. I don't know to what degree.

 

[Kenny_McCormic]

pics of bottom of rod? those are stock parts, maybe a ground cam.

 

[Magice]

Looks same as that one

 

[Kenny_McCormic]

Thats a dead stock motor.

 

[Magice]

The carb's choke has been taken out.. And it looks like there once was a fuel pump because a glued up hole that leads to a tube in the crank case..

The interior of the engine looks like it threw a rod once too

 

[jr dragster T]

The carb's choke has been taken out.. And it looks like there once was a fuel pump because a glued up hole that leads to a tube in the crank case..

The interior of the engine looks like it threw a rod once too

WOOT a fuel pump 3 HP right there! Only reason it may have had a fuel pump is because I'm pretty sure no matter what you race rules state it cannot be gravity fed.

 

[Kenny_McCormic]

That just means its been set up for a catch can.

 

[oscaryu1]

Stock motor with potential. I see a bearing crank!