I've been thinking about going from my present SE Stage 4 103 to a 107? I have a set of brand new cylinders with 0 miles that I could have bored to 107 and I'd just need a real good set of pistons. I have a TMan 625 cam with SE 110 heads that were street ported by Big Boyz. I'm also running a FatCat with the Big Boar baffle. My heads are 95cc. If I were to goto a 107 what would be my best choice for pistons? And the biggest question and the reason I would do it is How much power would I likely see from doing this? I'm currently at 10.75 for a CR and running 107 HP and 110 TQ. Thanks for all replies.

Ride Safe but Ride like Hell

 

It has been my experience on this forum that you will never be happy with you build. 103 to 107? Ok, now I want 107 to 110. Then what? Boss Hoss! lol

 

Yes, I can't agree more. Stick with 103! If you go from 96 to 107, different story.

 

I'd say do it! More power, more fun right?

 

Just go to 100. skip the 107.

 

sorry meant 110

 

On hillsides website they are stating they get 120+hp and 125+tq on their 107 kits. However that is their kit and numbers will very from theirs with different components.

http://www.hillsidecycle.com/index.p.../107-twin-cam/

 

not sure whether the weather has anything to do with it. Sorry, pet peeve.

 

I'd like to see the graph. Can't be a very flat torque curve getting that kind of a number from a 107"

I'd go to at least 110" if I was going from 103"

 

I've been talking to Scott at hillside and was told 103 was plenty of cubes it's all the rest that goes with it that makes all the extra power. So if your going to tear down and go bigger then you may as well go way bigger JMO