Page 1 of 1
oversize piston and rings for a 1991 KDX250SR F1 ???
Posted: 01:12 pm Mar 16 2010
by wildrat
Am looking to source an oversize piston and rings for a 1991 KDX250SR F1 In ether 1.5mm or 2.0 mm
Has anyone got any ideas where i can source one Thanks
Posted: 02:38 pm Mar 16 2010
by Julien D
I think wiseco did these in .020/.040/.060 over. 60 over should be about 1.5mm?
found this on ebay...
http://cgi.ebay.com/ebaymotors/WISECO-P ... ccessories
There are plenty more in varying sizes and prices. Just look around Ebay for a while, and check
http://www.wiseco.com to see what they still have available.
Re Piston
Posted: 06:08 pm Mar 16 2010
by wildrat
Thanks for the reply but the SR has a different piston to the standard KDX
pin height is different
has to be for the SR may be from AU or japan model
Thanks john
Posted: 06:40 pm Mar 16 2010
by Julien D
Oh, oops!
Might be a little tougher then, yeah? Bore size is the same? kdx200sr I've heard of, never heard of a 250sr. Maybe you could bolt on a kdx250 US cylinder?
Posted: 10:17 am Mar 17 2010
by fuzzy
You're sure the pin-height is different? That would be suprising, and very dumb on Kaw's part. If so you're looking at getting your cylinder repaired/replated or a sleeve installed to get back to stock bore dia.
Posted: 02:30 pm Mar 17 2010
by wildrat
I do not know any more than what i can find on the net as Kawasaki Uk
do not have any listing for the bike and I work for a Kawasaki Dealership
they can only supply the information on the Uk Europe and US models
no help at all on the Jap models
exert from
http://www.dirtrider.net/forums3/text/t ... 358-1.html
"The SR model does not have the same power valve set-up as the "regular" KDX250 (US version)... the SR model only has the side valves... therefore the cylinder is different... also the piston for the US version DOES NOT work in the SR model although bore and stroke data is the same... the wrist pin location on the SR model is higher on the piston skirt than the US version... you'll run into BIG trouble is you put a Wiseco or other brand piston for a US version KDX250 into your SR KDX!"
Posted: 04:59 pm Mar 18 2010
by wildrat
Also have found out has been fitted with a piston out of a cr250 hence my confusion
believe this is why i had a problem with the engine from when i got it
F**King Bodgers
Posted: 09:17 am Mar 19 2010
by fuzzy
Wow, that sucks. Too bad that's not true for the 200SR or it might be a viable source for a stroker crank
