Bored and Stroked Specifics?
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Cruiser
Joined: Mar 2009
Posts: 120
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Bored and Stroked Specifics?
New guy here. Been riding asorted Harley for sometime now but just now getting more into the mechanical side (just loved riding before). Anyway, can someone explain what is meant by a bored and stroked engine? Is it just putting larger pistons in after increasing cam diameter? If you bored and stroked a 88ci engine, what would the new ci be? Lastly, if an engine is bored and stroked, what other mods are needed, bigger carb, new clutch, new trans? Sorry for the dumb question for my first post.
Outstanding HDF Member
Joined: May 2008
Posts: 2,009
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From: South Jersey
88 inch is 3.75 bore X 4.0 stroke (Stock)
95 inch 3.875 X 4.0
96 inch 3.75 X 4.375 (Stock)
98 inch 3.983 X 4.0
103 inch 4.060 X 4.0
103 inch 3.938 X 4.375
110 inch 4.0 X 4.375
113 inch 4.060 X 4.375
These are just the more popular combinations.
95 inch 3.875 X 4.0
96 inch 3.75 X 4.375 (Stock)
98 inch 3.983 X 4.0
103 inch 4.060 X 4.0
103 inch 3.938 X 4.375
110 inch 4.0 X 4.375
113 inch 4.060 X 4.375
These are just the more popular combinations.
Road Warrior
Joined: Dec 2007
Posts: 1,854
Likes: 20
From: Eagle River WI
Bored means increasing the size of the bore for the bigger pistons (cylinders ) Stroke means lengthening the rod from the crank pin off the flywheels to the piston wrist pin !Forget the cam diameter If you want to know how to calculate displacement of a V-twin let us know
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