Big bore kits
Road Captain
Joined: Feb 2008
Posts: 588
Likes: 1
From: Burleson, Tx.
RE: Big bore kits
It's all about airflow not CI. Spend money for better flowing heads, cams, and throttlebody, you will be better with 95" kit but not because of cubes but more to do with forged piston versus cast. Somwhere on this site is a thread about 125 HP 95" motor.
Ultimate HDF Member
Joined: Feb 2007
Posts: 7,663
Likes: 7
From: Northeast Ohio
RE: Big bore kits
ORIGINAL: benman
It's all about airflow not CI. Spend money for better flowing heads, cams, and throttlebody, you will be better with 95" kit but not because of cubes but more to do with forged piston versus cast. Somwhere on this site is a thread about 125 HP 95" motor.
It's all about airflow not CI. Spend money for better flowing heads, cams, and throttlebody, you will be better with 95" kit but not because of cubes but more to do with forged piston versus cast. Somwhere on this site is a thread about 125 HP 95" motor.
A good aftermarket kit build will net you really good gains. Headquarters, GMR, and a whole host of other builders put some really nice kits together and know what works well with what. A mismatched component build will dissapoint you in the end. I am not a pro builder, but have done enough of em to know that it takes a whole lot of research to get the right components if not going with a kit.
I went with HQ due to service and reputation, but there are others, so do your research.
Thread Starter
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Cruiser
Joined: Feb 2008
Posts: 141
Likes: 0
From: Syracuse, NY
RE: Big bore kits
Thanks for the info Dalton, I agree, it is the right combo of parts that make up the beast. Also, I think I will hold off on the stroker purchase from you for now even though it is a good price.
Road Warrior
Joined: May 2006
Posts: 1,479
Likes: 4
From: SoCal
RE: Big bore kits
Splitting the cases to stroke your bike is an awful lot of extra money - great if you have it! 
A compatible set of 95" components will deliver reliability with exciting performance - every time!
A compatible set of 95" components will deliver reliability with exciting performance - every time!
Road Master
Joined: May 2007
Posts: 851
Likes: 5
From: Mitchellville, Ia.
RE: Big bore kits
ORIGINAL: benman
It's all about airflow not CI. Spend money for better flowing heads, cams, and throttlebody, you will be better with 95" kit but not because of cubes but more to do with forged piston versus cast. Somwhere on this site is a thread about 125 HP 95" motor.
It's all about airflow not CI. Spend money for better flowing heads, cams, and throttlebody, you will be better with 95" kit but not because of cubes but more to do with forged piston versus cast. Somwhere on this site is a thread about 125 HP 95" motor.
Road Master
Joined: May 2007
Posts: 851
Likes: 5
From: Mitchellville, Ia.
RE: Big bore kits
ORIGINAL: benman
It's all about airflow not CI. Spend money for better flowing heads, cams, and throttlebody, you will be better with 95" kit but not because of cubes but more to do with forged piston versus cast. Somwhere on this site is a thread about 125 HP 95" motor.
It's all about airflow not CI. Spend money for better flowing heads, cams, and throttlebody, you will be better with 95" kit but not because of cubes but more to do with forged piston versus cast. Somwhere on this site is a thread about 125 HP 95" motor.
S2 = 100/100 H&T
S2-1/2 = 105-108 H&T
S4 = 108-110 but rev 3 seconds quicker than stock
S5 = 118-122 H&T
These are high torque kits with very good VE, nothing obnoxious, easy starting, and cool running.
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Road Warrior
Joined: Nov 2007
Posts: 1,984
Likes: 7
You want to talk to the King of Cubes. Really.
But I wouldn't bore out Harley stock 3.750 any further than 3.935 (3 15/16 in). Because the spout that goes into the case gets thinner and thinner. Harley walls get pretty thin about here also. Why there are after market, much thicker cylinder liner, makers around.
But I wouldn't bore out Harley stock 3.750 any further than 3.935 (3 15/16 in). Because the spout that goes into the case gets thinner and thinner. Harley walls get pretty thin about here also. Why there are after market, much thicker cylinder liner, makers around.