Can anyone tell me if the piston pin height on the 84-89 CR pistons is the same as the 90-01? Sounds like either my main bearings or lower rod bearing are going out and it's time for a rebuild on my 93. I would like to use a Wossner piston but they only make a piston for a 84-89 which I find odd because I thought in 89 the motors became close to the 90-01 in design. (long rod and taller cases)
I though somewhere in one of the threads this was addressed but I couldn't find it.
84-89 piston pin height vs 90-01
-
- Posts: 4394
- Joined: July 4th, 2007, 6:57 pm
- Roostius_Maximus
- Site Admin
- Posts: 4641
- Joined: November 16th, 2007, 3:24 pm
- Location: Mt Nebo, Manitoba, Canada
- Contact:
oem + other brand pistons do fit all the years, possibly the intake window in the piston is larger than the 90+'s factory ones were, or the exhaust face of the piston is wide like the old ones were
http://www.youtube.com/user/500bigbore
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
![Image](http://i89.photobucket.com/albums/k209/bostod69/more/mre-logoadextndhlweb.jpg)
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
![Image](http://i89.photobucket.com/albums/k209/bostod69/more/mre-logoadextndhlweb.jpg)
-
- Posts: 120
- Joined: September 12th, 2007, 9:24 am
- Roostius_Maximus
- Site Admin
- Posts: 4641
- Joined: November 16th, 2007, 3:24 pm
- Location: Mt Nebo, Manitoba, Canada
- Contact:
bingo
http://www.youtube.com/user/500bigbore
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
![Image](http://i89.photobucket.com/albums/k209/bostod69/more/mre-logoadextndhlweb.jpg)
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
![Image](http://i89.photobucket.com/albums/k209/bostod69/more/mre-logoadextndhlweb.jpg)
- dannygraves
- Posts: 8020
- Joined: June 1st, 2007, 2:03 pm
- Location: Las Vegas, NV
I've compared them, the cutout on the older pistons is considerably larger and that is the only difference. put a '90+ piston in an older jug and you'll see a step where the opening is narrower than the port.
'09 kx450f 4-Poke
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
![Image](http://www.e-imagesite.com/Files/nitcirc117832991.gif)
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
![Image](http://www.e-imagesite.com/Files/nitcirc117832991.gif)
- Roostius_Maximus
- Site Admin
- Posts: 4641
- Joined: November 16th, 2007, 3:24 pm
- Location: Mt Nebo, Manitoba, Canada
- Contact:
the pin that holds the ring is different on the OLD oem#, i know LA Sleeve has a couple of those in stock standard bore that he doesnt feel comfortable selling cuz they said they had issues
http://www.youtube.com/user/500bigbore
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
![Image](http://i89.photobucket.com/albums/k209/bostod69/more/mre-logoadextndhlweb.jpg)
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
![Image](http://i89.photobucket.com/albums/k209/bostod69/more/mre-logoadextndhlweb.jpg)