Hi all, I have an 06 FLSTCI and bought some big billet race heads with 2" inlet valve and 1" 5/8 exhaust with the combustion chamber size at 84cc from the States and a set of Woods TW 6H cams.I have a spare set of cylinders i want to bore to 98 and was wondering what the best pistons to suit would be. I have read 10.2:1 compression is about correct for this cam but  any info would be appreciated.

A intro as a first post is always a good start

But being an 06 you have an 88ci yeh????

if so ya need more than a bore to get to a 103ci

Hi Ando thanks mate missed the intro just rectified that. Yes it an 88ci what's the biggest I can go then without cutting the cases .

You can bore out to 95 or 98.

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Cheers mate stuffed that up then it will have to be 98 then

ive been told by a very well informed gent that 95 is the way to go

95 is nice , 98 cub leaves nothing left in bores, if your chaseing every last hp , then 98 , all best with build ,

Ok thanks mate yeah 95 is the go then.Yes I think I read a few years back they do do 98ci re-sleeve after market cylinders with the bottom sleeves machined so they still fit the case is that right?

Thanks

http://vid654.photobucket.com/albums/uu263/bultacopursang/big%20billet.mp4

http://s654.photobucket.com/user/bultacopursang/media/big%20billet.mp4.html?sort=3&

take to  hoody with your  wallet or ask trask what to run non turbo/blown

 

 

 

Greggy don't fuck around mate if ya gonna bore ya stock cylinder bore all the way leave nothing on the table. bore out to 98 you won't have any reliability issues if who ever does it uses torque plates.

Look at CP pistons and the bigboyz calculator to work out what comp ya want to get at. Bobby's cam like comp so don't be scared to get that 98cuber up to 10.5 and get a good tune, even a bigger TB to feed it

good luck Cob with the build

In case you're not aware:
95 to an 88 motor is the same as 103 to a 96 motor.
98 to an 88 motor is the same as 106/107 to a 96 motor.
Cylinders on a 88 and 96 are the same - diff in displacement is the crank.

Lots of 106 and 107 twin cams getting around without issues. There are thousands of them in the USA - big mobs like fuel moto make it their business and they bore out the oem cylinders. I agree with ando - go the whole hog.

If you use the 106 size piston and cylinder, you could even take it out to the 107 size in the future if you had to. 

Thanks Mate