Maintenance & Technical > KX100 / KX85 / KX80 / KX65 / KX60

can a 60 be bored to take a stock 65 piston

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sandblaster:
2000 KX60 has a stroke of 41.6mm.
2000 KX65 also has a stroke of 41.6mm.
According to the book, **KX60 crank 13031-1448** Fits
1999 KX60-B15 KX60 CRANKSHAFT-PISTON(S)
2000 KX60-B16 KX60 CRANKSHAFT-PISTON(S)
2001 KX60-B17 KX60 CRANKSHAFT-PISTON(S)
2002 KX60-B18 KX60 CRANKSHAFT-PISTON(S)
2003 KX60-B19 KX60 CRANKSHAFT-PISTON(S)
According to the book, **KX65 crank 13031-1467** Fits
2000 KX65-A1 KX65 CRANKSHAFT-PISTON(S)
2001 KX65-A2 KX65 CRANKSHAFT-PISTON(S)
2002 KX65-A3 KX65 CRANKSHAFT-PISTON(S)
2003 KX65-A4 KX65 CRANKSHAFT-PISTON(S)
2004 KX65-A5 KX65 CRANKSHAFT-PISTON(S)
2005 KX65-A6 KX65 CRANKSHAFT-PISTON(S)
Another option would be to buy a KX65 cylinder that needs a rebuild and get all the dimensions from it:
http://www.ebay.com/itm/Kawasaki-1990-KX-65-Cylinder-E-369-/170720073429?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item27bfb596d5
Off the guy 50 bucks for it.
If you get it, you can always resell it when your done (Assuming that it does not work out)
There must be a forum that specializes in these smaller bikes:
Just a quick Google search netted the following:
http://www.justanswer.com/motorcycle/5g9e1-will-kx65-fit-kx60-bike.html
http://bikez.com/msgboard/msg.php?id=19826&type=bike
http://forums.dirtrider.com/70/6525841/kawasaki-dirt-bikes/kx60-top-end-job/index.html

DoldGuy:
John,
The KX60 & KX65 have the same Wrist Pin, the same Rings per size. The difference in the pistons is the KX60 has a 24mm compression height & the KX65 is 23.6 mm. If memory serves...... :oops:......the ring pin location is the same. The head needs to be brought down to correct the squish clearance & adds some port timing  :-D

Hope this helps,
DoldGuy

jonny500:

--- Quote from: DoldGuy on December 22, 2011, 01:38:21 PM ---John,
The KX60 & KX65 have the same Wrist Pin, the same Rings per size. The difference in the pistons is the KX60 has a 24mm compression height & the KX65 is 23.6 mm. If memory serves...... :oops:......the ring pin location is the same. The head needs to be brought down to correct the squish clearance & adds some port timing  :-D

Hope this helps,
DoldGuy

--- End quote ---

gold dust, thats what i was after. thanks to all of you for your efforts on this. so i will buy the 65 piston and see how it goes if what doldguy is correct then is just a re-bore + a thiner head gasket. i will make sure the result of this is posted for future reference

funke93:
so what happened can you do it?

jonny500:
yes it did work and bike ran fine. the main problem is the head gasket. the bore hole needs to be widen a little and then it all works fine. i used an after market gasket kit with a fibre head gasket. in hind site i would have purchased an all metal kawasaki head gasket as it would be easier to modify. the  stock kx 65 gasket will not fit

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