Author Topic: 55.5mm bore size?  (Read 563 times)

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ceh1138

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55.5mm bore size?
« on: June 13, 2008, 11:12:09 PM »
this may sound wierd, but here goes.
i dont know if i should post this question here but it seems like you all would know.  i'm trying to find a head gasket for my '74 cb200t.  yes, its a twin, and apparently a very unpopular one.  i've been looking for months for anyone with a top end kit and no luck.
i may be totally off base, but looking at gaskets for 400fs, i got the idea to buy a four cylinder gasket and trim off the extra cylinders.  it looks like the head bolts line up, as well as the cylinders and chain slot.
it looks like 400fs have a bore of 54mm, while my bike has a bore of 55.5mm.  anybody know of any fours that have a 55.5mm bore size?  or whether i'm crazy for trying this?
thanks for any help!