951 cut/shaved heads.

[SabrToothSqrl]

Ok, so what's the deal with so many of the 951 head being shaved down from OEM?

Is this adding HP? why are people do this?

I don't get it.

Why are they modifying this part?

The OEM head has a bit of a lip around the cylinders, but so many of the heads I see, do not...

WHY?!

thanks guys!

 

[SabrToothSqrl]

Ok, so I was talking to Tom at SES, apparently the ones with the lip are the ones that have the combustion chamber milled out, to reduce performance/compression.

Vs. a shaved head which would raise compression and ideally, horsepower.

He said he was going to send me pics today on the differences.

 

[SabrToothSqrl]

Photos

The head on the left is OEM.

The head on the right has had the combustion chamber milled out.

I'm told milling the combustion chamber is to reduce performance/compression.

 

[SabrToothSqrl]

Apparently I posted to Spark, can someone move this to 2 stroke or performance? thanks!