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Case boring

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Anyone know the "max" safe bore size for a 83 katana 1100 engine case ? 

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12 minutes ago, no class said:

Anyone know the "max" safe bore size for a 83 katana 1100 engine case ? 

Cases "as in crankcases"

or do you mean block / barrels ?

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4 hours ago, no class said:

Anyone know the "max" safe bore size for a 83 katana 1100 engine case ? 

Not sure on actual max. bore size, but the limiting factor is the space between sleeves and acceptable min. wall thickness of these sleeves. As far as boring and so weakening of the crankcases goes, the use of a solid "big block" is intended to provide additional support for the crankshaft where the bored crankcases are less able to do so.

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As 1500/1570 is a fairly normal size @ 87mm and someone used to have an 1800cc GSX @ over 90mm bore - its safe to say BIG!

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Excellent !  So the big lump under my work bench gets a new life .

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Anything bigger than 1500 you need to use 1150 cases, bigger than 1463 really, as they have more material in the stud areas. Even then, you will need to epoxy the areas that break thru to clear for sleeves that big, especially behind the ignition plate.

Ray.

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Suzukiray from dragbike.com..... welcome to OSS ..... thanks for the info .

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On 4/29/2018 at 12:19 PM, no class said:

big lump under my work bench

All gsx engines are big lumps, but like proved in the past how deep your pockets, these engines can give reliable power, either street or strip use but prep different on needs basis, aspirated Nitrous or Turbo ? then let the fun start.

What cc you looking for realistically ?

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1 hour ago, kiwi said:

All gsx engines are big lumps, but like proved in the past how deep your pockets, these engines can give reliable power, either street or strip use but prep different on needs basis, aspirated Nitrous or Turbo ? then let the fun start.

What cc you looking for realistically ?

Tbh.... not going nuts on this .re-sleeve the stock block to fit biggest liners possible . Will be a road bike for now .

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1166cc straight bore in stock liners or common upgrade 1260cc with liners, and you can fit bigger liners but barrels get thin in middle but easily doable and for street use, or if wanting/needing to do cheap you can fit bandit 12 liners bored out and fit busa pistons (available in 18mm + 20mm pin sizes, but leads to more workneeded to get compression right.

 

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