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

1982 WR250 Boost ports

Discussion in 'Vintage/Left Kickers' started by Action Jonny, Nov 30, 2022.

  1. Action Jonny Husqvarna
    AA Class

    Location:
    UK
    Husqvarna Motorcycle:
    xc250
    I have a 1982 250XC and I'm planning to try a WR cylinder to see if it helps with bottom end power as I ride a lot of technical trails. I noticed my XC cylinder has the two boost ports while the WR cylinder does without. I would really appreciate if anyone could tell me if it would be worth putting in the boost ports to the WR cylinder. It doesn't look like it would be a difficult job but I'm not sure what effect this'll have on the power delivery.
  2. Eurofreak Husqvarna
    AA Class

    Location:
    Western NY
    Husqvarna Motorcycle:
    1986 TE 510, 1982 CR250, 2008 WR250
    Other Motorcycles:
    70's Triumph , Bultaco , Maico, etc
    I have an 82 WR 250. Boost ports are for top end I think. Better low end would be from lowering the exhaust port. One option would be to resleeve your cylinder with a WR sleeve. WR cylinders are very hard to find.
  3. Action Jonny Husqvarna
    AA Class

    Location:
    UK
    Husqvarna Motorcycle:
    xc250
    Hi thanks, yes I might look and see if I can find a thinner base gasket, or maybe try sealant.
  4. Joe Chod Husqvarna
    Pro Class

    Location:
    upstate NY
    Not so much boost ports on 82 xc and CR. these are for mid top
    the 82 wr exhaust port is like 3mm lower than on the xc cr. this is why and where the low snap on the 82 wr comes from
    one year only cylinder and getting tougher to find every day
  5. Action Jonny Husqvarna
    AA Class

    Location:
    UK
    Husqvarna Motorcycle:
    xc250
    After much searching I managed to find a WR cylinder, I can definitely notice the difference. I've also fitted a slightly thinner base gasket.
  6. Picklito Husqvarna
    Pro Class

    Location:
    Washington
    Husqvarna Motorcycle:
    430, 430, 430, ,400, 175
    Other Motorcycles:
    KTM250xc, KTM500mx, KTM440exc
    Thank you for following up. Almost no one does that.
    For others, I have talked to LA Sleeve about this. They have specs for the 82WR porting, and say they can make the sleeve.
    Base gaskets are available from Cometic in many thicknesses.
    Crashaholic likes this.
  7. Action Jonny Husqvarna
    AA Class

    Location:
    UK
    Husqvarna Motorcycle:
    xc250
    No problem! Just for the record I used 1mm gasket material and made my own.