Boring 883 Cylinders to 1200

[Tomcatt]

Originally Posted by sungod

Of course it's your decision just pointing out another option for lot's less expense.

Yes, but you better be sure you won't want more later, 'cause if you do, what you spent doing the 883 to 1200 upgrade was money wasted.

[sungod]

Originally Posted by Tomcatt

Yes, but you better be sure you won't want more later, 'cause if you do, what you spent doing the 883 to 1200 upgrade was money wasted.

The 03 883 sportster is one of the best platforms to start with when hot rodding. You can get close to 80 hp from the modified stock parts. 65% increase and can drive with reliability. Of course if and when you want more power yes you will need more advanced parts to get there. Then there is the rub: Do you want to spend +6k ? Maybe money saved not money wasted is a prudent approach.

[brucstoudt]

i've always been surprised by how many 883's have been sold.why not skip over the upgrade and just start with a 1200? i wouldn't have bought an 883,i inherited it from my father.been riding an 1190 ironhead since '78.

[sungod]

Originally Posted by brucstoudt

i've always been surprised by how many 883's have been sold.why not skip over the upgrade and just start with a 1200?i wouldn't have bought an 883,i inherited it from my father.been riding an 1190 ironhead since '78.

Just an opinion here but there are new riders that want to say they ride a harley and go out and buy a sportster 883 get the s**t scared out of them and sell. I think the hugger also was designed for shorter legged people which actually works well for hot rods. Then you get some 1200 buyers who also get s**t scared and sell. In any event the inventory for low mileage sportsters will be with us for a little while and then there will be loads of parts on ebay.

[brucstoudt]

Originally Posted by sungod

In any event the inventory for low mileage sportsters will be with us for a little while and then there will be loads of parts on ebay.

this is encouraging because,they don't make them anymore!

[rejeanprimeau]

And by 2040, when the wokes will be elected in office, we will only allowed to show them in a glass shielded chest.

[decman]

Many areas including Europe have tiered MC license and insurance levels,
900cc being one of the steps.

It wasn't till '86 that you had a choice of engine sizes on a new bike.

Also many people forget that the whole SE line of performance parts were originally for Sportster only, they did not make SE parts for BTs until later.

I can't find it now but isn't there a MC racing that requires the MFG to sell bikes of that class and size?

Originally Posted by brucstoudt

i've always been surprised by how many 883's have been sold.why not skip over the upgrade and just start with a 1200?i wouldn't have bought an 883,i inherited it from my father.been riding an 1190 ironhead since '78.

[John Harper]

Originally Posted by rejeanprimeau

And by 2040, when the wokes will be elected in office, we will only allowed to show them in a glass shielded chest.

Don't despair, people still ride horses.

John

[rejeanprimeau]

Originally Posted by John Harper

Don't despair, people still ride horses.

John

Yes, and those poor horses are now feeded with low methane emission oat.

[bweever]

I am aware of the cylinder liner thickness has changed over the years, all the cylinders that I am boring out are pre 2007, I am not interested in purchasing any 1200 cylinder kits as I have acquired several 883 cylinders that I will be boring to 1200 so I can get the exact piston to cylinder clearance that I want for the engine builds that I am doing.
The 883 cylinder skirt end has a much more pronounce chamfer which is closer to the cylinder base than a stock 1200 cylinder skirt, so when the ID of an 883 cylinder is bored out some of this chamfer is cut away due to the boring process which will cause the skirt to become shorter by about .100" so my question is how short of a cylinder skirt is still considered acceptable?
I have noticed a lot of suggestions of using torque plates while boring, I have measured both 883 & 1200 cylinders with torque plates and without torque plates and I do not see any change in dimensions.
Just wondering if there is machinist who has actually done the machining of 883 to 1200 cylinders themselves that can answer my questions. Thanks