1. Husqvarna Motorcycles Made In Sweden - About 1988 and older

1972 Wr250 Piston?

Discussion in 'Vintage Restoration Projects' started by tomk32e, Nov 3, 2021.

  1. tomk32e Husqvarna
    C Class

    Husqvarna Motorcycle:
    72 250WR, 73 250RT, 21 FE350S
    Other Motorcycles:
    76 Yam DT400C, 74 Hon MR50; 00 Hon M
    Hello fellow "Vintage Left Kickers",

    I am in the midst of starting a restoration on a 1972 WR250 and am trying to find a source for a 0.5mm or 1.0mm over-bore piston kit. Vintco lists everything except the '72 WR250. Is there something special/different about this piston besides the stock bore being slightly different? My bike looks to have the stock bore(?) with a stamp on the top of the piston of "69,43". (I'll post some pictures in a little bit.)

    Can anyone educate me or steer me in the right direction on this? I'm hopeful that someone makes a piston so that I don't end up having to source a NOS over bore.

    Thanks in advance for your help.
  2. tomk32e Husqvarna
    C Class

    Husqvarna Motorcycle:
    72 250WR, 73 250RT, 21 FE350S
    Other Motorcycles:
    76 Yam DT400C, 74 Hon MR50; 00 Hon M
    Photos attached.

    Attached Files:

  3. Vinskord Husqvarna
    AA Class

    Husqvarna Motorcycle:
    400 CR
    HVA Parts Book shows the same part number for a CR and WR piston. What is your engine #(First 4 digits)?

    Pistons - Copy.png
    tomk32e likes this.
  4. Crashaholic Husqvarna
    Pro Class

    Location:
    Antelope Valley, CA.
    Husqvarna Motorcycle:
    73 450WR 6spd motor in a 75 MK frame
    Nothing different about your piston or its bore. 69.43 is the stock bore. Vintco's 69.50 is what they believe the cylinder bore should be. BTW, they show a piston for a 1972 250WR in their selection.
    tomk32e likes this.
  5. tomk32e Husqvarna
    C Class

    Husqvarna Motorcycle:
    72 250WR, 73 250RT, 21 FE350S
    Other Motorcycles:
    76 Yam DT400C, 74 Hon MR50; 00 Hon M
    Thanks! I went ahead and ordered the Vintco and received it in less than 3 days! Looks to be an exact match. (Except for the 1st over bore of course.)