99+ YZ250 cylinder on 1998 YZ250?

mattyhamz2
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I know the cylinders changed in 99 as did the power valve, but has anyone been able to put a 99+ cylinder and power valve on a 96-98 YZ250? And if so, was it worth it to have more pipe options etc.?
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mattyhamz2
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mattyhamz2 5/9/2020 6:05pm
5/9/2020 6:05pm
sandman768 wrote:
Are 98 YZ250 pipes hard to come by?
Not necessarily. But no raw pipes for them and a few other little things. I also have some 99+ cylinders laying around and pipes to fit with it.
Not a big deal if it isn’t possible, I was just curious.
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sandman768 5/9/2020 6:16pm
5/9/2020 6:16pm
I have been kind of looking for a 97-98 YZ 125 or 250 for my next project...they are getting hard to find in decent condition...
mattyhamz2
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mattyhamz2 5/9/2020 6:22pm
5/9/2020 6:22pm
sandman768 wrote:
I have been kind of looking for a 97-98 YZ 125 or 250 for my next project...they are getting hard to find in decent condition...
There are a few in my area, but guys want way too much for them. We were lucky enough to find this one from a friend and was only $500. Good shape and I don’t know if the motor has ever really been apart.
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sandman768
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sandman768 5/10/2020 4:39am
5/10/2020 4:39am
mattyhamz2 wrote:
There are a few in my area, but guys want way too much for them. We were lucky enough to find this one from a friend...
There are a few in my area, but guys want way too much for them. We were lucky enough to find this one from a friend and was only $500. Good shape and I don’t know if the motor has ever really been apart.
Guys are asking 2200-2800 for older YZ”s around me, and most of them are junk...heck guys want 1000 for blown up bikes....
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mattyhamz2
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mattyhamz2 5/10/2020 2:40pm
5/10/2020 2:40pm
mattyhamz2 wrote:
There are a few in my area, but guys want way too much for them. We were lucky enough to find this one from a friend...
There are a few in my area, but guys want way too much for them. We were lucky enough to find this one from a friend and was only $500. Good shape and I don’t know if the motor has ever really been apart.
sandman768 wrote:
Guys are asking 2200-2800 for older YZ”s around me, and most of them are junk...heck guys want 1000 for blown up bikes....
It’s crazy how much people want for 20 year old bikes. No way I’m spending more than $1500 for something older than 02
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FGR01
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FGR01 5/11/2020 6:24pm
5/11/2020 6:24pm
The 99 engine was a complete new model change. Pretty sure there is no hope of bolting a 99+ cylinder to a 98 and older bottom end. Wasn't the bore & stroke even different?
mattyhamz2
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mattyhamz2 5/13/2020 9:57am
5/13/2020 9:57am
FGR01 wrote:
The 99 engine was a complete new model change. Pretty sure there is no hope of bolting a 99+ cylinder to a 98 and older bottom...
The 99 engine was a complete new model change. Pretty sure there is no hope of bolting a 99+ cylinder to a 98 and older bottom end. Wasn't the bore & stroke even different?
I'm not quite sure. I wouldn't be surprised though. Maybe I'll look for a 99-01 YZ motor to drop in when this one goes.

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