| Author | Message | ||
     Vonsliek |
any thoughts for race performance?! seems i recall reading abt smaller heads on bigger bottoms for increased high end flow on racetrack?! tyically under carbing a high revving, oversquare engine yields btr performance .. so, for efi hotrodded xl motors .. wldn't reducing a wee bit heads make for a better response for track racing? pauly. | ||
| M1combat |
Aren't the heads the same? | ||
| Cyclonecharlie |
I didn't think we had a high rev. motor? Our redline is most bikes "mid-range". | ||
| Josh_cox |
The part numbers are exactly the same. So, you will see no difference. | ||
| Indy_bueller |
It's the pistons that are different. | ||
| M1combat |
And the stroke... | ||
| Wademan |
The 9 has a shorter stroke allowing it to rev higher. The head will not affect anything. | ||
| Deuceman |
If I am not mistaken, only the stroke is different between the two engines. I think the 9 is just a destroked 12. Somebody correct if I am wrong. |
