How much more should you expect out of a 107 vs 103 HP/TQ wise. Also does the 107 put alot more stress on the stock crank, bottom opposed to a 103.
Thanks for the info.

 

Most folks opt to have their cylinders bored to 107" here, and subcribe to bigger is better.
Certainly more power can be realized.
As far as the crank issues, even an 88" that gets beat on, can wind up with a crank problem.
Scott

 

having had both a 103 and two 107's (all three HQs complete builds) the 107 is most definently the way the go -- the difference in price is very marginal maybe $100. The power output especially on the torque side is night and day. It is amazing what 4 cc's will do.

I have rode hard on all three bikes, not one crank issue---I had the crank run out checked on all three bikes (this is a must) and all three were well within tolerance levels.

 

I'll agree bigger is always better...107 will pull your streetglide down the road quite nicely! Tq is king in a bagger..

Thats unless you want to step up to something bigger......

 

...ccs?

 

What is to old drag strip saying, "Ain't no substitute for cubic inches!"

If'n ya want reliability, stay stock. If'n ya want to go fast, bigger is better.

 

No replacement for displacement.


This isn't always true though. Dual overhead cams, four-valves per cylinder, water cooling, high compression, tight tolerances and high revs go a long way.

 

reliabilty is there -- build it correctly the first time with components that compliment each other and it will last just like a stock motor or better

 

[QUOTE=lkr0;5036564]reliabilty is there -- build it correctly the first time with components that compliment each other and it will last just like a stock motor or better[/QUOT

Not an motor expert at all, but have to agree that if its buillt right with quality parts that it will be reliable.

I guess my point of the question is why go 103 over 107 since both dont require you to split the cases. Why not get the most bang for you buck?

 

Did ya read my sig about my RG?