2001 RM 125 piston i.d. #'s

[ironwood]

hey guys,

i just bought the above bike (mostly stock) from someone who had no idea of the previous history of the bike. i took the top end apart expecting to throw in a stock 54mm wiseco piston and found that the cylinder had been bored out.

im now trying to find a replacement piston through wiseco for this bike, but at this point cant make complete sense of the i.d.# on the top to find the correct size, anyone who can shed some light on this situation would be much apperciated!

stock wiseco # = 1753B (upper#)
754M05400 (lower #)

Existing piston # = B38D1 (upper #)
1.00MM (lower#)
754P4
CS



thanks again

 

[Faded]

...but at this point cant make complete sense of the i.d.# on the top to find the correct size, anyone who can shed some light on this situation would be much apperciated!

A google search on the 754P4 number shows that it's a Wiseco piston for 2000-02 RM125's that is 55mm or 0.040" over std.

 

[Eric Gorr]

The new number is 754MO5500 making your bike 130cc