Stage kits

[Hybredhog]

  Well maybe it is as simple as it seems. less valve weight, less spring pressure , larger base circles, better geometry, and a possibly weakened/more accurate lifters. So with all of these & metallurgy on a STOCK engine just might last a "life time".  But who's life time, your average rider might put on less than 5k miles a year, will it see 100k^?

[Soft 02]

The lifetime of the warranty!

[rbabos]

The lifetime of the warranty!

Sad but likely true.
Ron

[koko3052]

 

[Latrobedyna]

If you look at the specs of a stock 107 versus a 114 it appears from what i seen the stroke is different. With that being said what if you used the bigbore 114 kit on the 114 motor? wouldn't it net you a 120" motor. Please don't laugh at me just wondering out loud is all.

[rigidthumper]

117

[00se]

Talked to the parts man at our local dealer. He told me Harley has two kits. One is a 107 to a 114. The other a 114 to a 117.

[FSG]

Stock the 114 has both bore and stroke over the 107



the Big Bore Kit increase to 4.075 is better bang for the $$ for the 107 rather than the 114 although the result isn't to be sneezed at. 

Personally I'd be looking to see how far the cylinders can be bored before lashing out the $$$$

[happyman]

on the 117" have to wonder how far it can be punched out?  could be a 120"?