oversize cylinder
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oversize cylinder
hello all, i have a 93 kdx 200 i am rebuilding. it has a cylinder that measures 72mm (standard being 66mm). it is sleeved and recently nicasiled. having trouble locating a 72mm piston. i know this sounds odd but the old piston was 72mm and cyl was just sleeved. during rebuild i had the scarred cyl nicasiled and now cant find a piston. any help would be greatly appreciated
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Re: oversize cylinder
I think someone else was looking for one just a week ago. Look back a few threads.
Welcome to the forums and good luck.
By the way, do you have the power valve system? I was once told by a highly skilled tuner that the power valves would not work with the 240 kit (I assume that is what you have). Thank you.
Welcome to the forums and good luck.
By the way, do you have the power valve system? I was once told by a highly skilled tuner that the power valves would not work with the 240 kit (I assume that is what you have). Thank you.
Thank you for participating on kdxrider.net.
To post pictures from a device: viewtopic.php?f=88&t=24128
To post pictures from a device: viewtopic.php?f=88&t=24128
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Re: oversize cylinder
Can you locate a part number on the old piston?
'81 KDX 175
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
'98 STX 1100 JetSki
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
'98 STX 1100 JetSki
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oversize cylinder
@kdx rider I searched high and low for a piston to fit a 1990 KDX200 with the 240 big bore kit. Cylinder measured 72mm. I talked to Wiseco who originally made the piston for LA Sleeve and was told they quit making it in 2005. LA Sleeve doesnt have one laying around. I spoke with Eric Gorr and the folks at Kustom Kraft and they recommended finding a used stock cylinder. Easier said than done, but I tracked one down and ordered it Tuesday.
I looked also for a 72mm piston with similarish specs and the closest I got was a 1984 KX250 piston, but it runs an 18mm wrist pin, so you would have to replace the wrist pin bearing with a thin bushing or have the piston bosses bushed down to 16mm.
The cylinder I ordered comes with piston and power valves. I am crossing my fingers that nothing is missing. Best of luck!
I looked also for a 72mm piston with similarish specs and the closest I got was a 1984 KX250 piston, but it runs an 18mm wrist pin, so you would have to replace the wrist pin bearing with a thin bushing or have the piston bosses bushed down to 16mm.
The cylinder I ordered comes with piston and power valves. I am crossing my fingers that nothing is missing. Best of luck!
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oversize cylinder
i will see if i still have the old piston to check for a part number. thanks for the replies. looks like the 18mm wrist pin is going to be the problem