big bores?

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Jan 18, 2011 | 07:29 PM

ElectraHead

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big bores?

whos doing there own bore kits? have a 2005 88ci and was thinking of bringing it to a 95ci?then a friend asked why not a 103ci? would the stock lower end hold up to that?

Jan 18, 2011 | 07:30 PM

TORQUEY

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Jan 18, 2011 | 07:49 PM

harleytuner

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Quote:

Originally Posted by ElectraHead

whos doing there own bore kits? have a 2005 88ci and was thinking of bringing it to a 95ci?then a friend asked why not a 103ci? would the stock lower end hold up to that?

You can't do a 103 without opening up the bottom end. 98" is as big as you can go with just the top end. A 103" would require a stroker crank
4 3/8".

Jan 18, 2011 | 08:03 PM

ElectraHead

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thanks, thats pretty much the response i got from SE. just i can get a 98ci?any recomondations where to find these parts?

Jan 18, 2011 | 08:05 PM

djl

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From: san antonio

Quote:

Originally Posted by ElectraHead

whos doing there own bore kits? have a 2005 88ci and was thinking of bringing it to a 95ci?then a friend asked why not a 103ci? would the stock lower end hold up to that?

Splitting the cases and/or case boring are the only ways you get from 88" to 103". A stroker crank or case bore will do it and if you go to that much trouble and expense, case bore to fit 4.125" cylinders and go to 117". The power of a 117" makes it a necessity to true, balance and weld the crank. Oh yeah, while your at it you need to have the case fitted for the Timken crank bearing conversion. You are only talking about spending another $2500.

If that's too rich for your blood, have your cylinders bored to fit a set of 3.932" pistons, send your heads to Don Dorfman (Dewey's Heads) for his blue print andstreet port job, machine for compression necessary for SE204 or Andrews 37 cams, install a good fuel management system, good 2:1 exhaust and tune.

Others posted while I was typing. Above build plan will get the job done; very predictiable results 100/100 numbers; dependable build and will run forever if properly maintained and it won't break the bank However, there are other combinations; just depends on what you want and how you ride.

Last edited by djl; Jan 19, 2011 at 11:54 AM.