1. 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
    WR = 2st Enduro & CR = 2st Cross

250-500cc Another Piston Thread

Discussion in '2 Stroke' started by Huskynoobee, Nov 23, 2015.

  1. Joedints Husqvarna
    AA Class

    Location:
    Medford, New Jersey
    Husqvarna Motorcycle:
    11 WR300 13 WR125 81 WR430 82 CR250
    Other Motorcycles:
    Kawasaki ZR7-S
    Nice graphics. Where they come from?
  2. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    Rideavik.com. Matt is very easy to work with.
  3. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    So, just a quick follow up. I can now say with confidence this swap to the Wiseco was a great call. I did one more 10 mile ride Saturday afternoon before the race yesterday and I felt it was ready to go.

    The thing is back to happy tractor mode! I cleaned all the nasty stuff with ease and it ran like a champ all day. There was a looong fast sand wash that had me on point with throttle modulation so as to avoid a bad day, but other than that I didn't even worry about it.
    juicypips and lankydoug like this.
  4. lankydoug Husqvarna
    Pro Class

    Location:
    MO
    Husqvarna Motorcycle:
    WR
    Other Motorcycles:
    TM 300en
    I'm glad to hear that. My next piston might be a weisco. I think they are better than cast as long as you give them enough clearance and don't rev the engine until everything is fully warmed up. Losing tractor mode is a good way to describe what a tired top end feels like.
  5. mikebru Husqvarna
    AA Class

    Location:
    Ocean County, NJ
    Husqvarna Motorcycle:
    2009 WR250; 2012 TE449; 2005 TE450
    So I just took my first top end apart. It's an 09 WR 250. PO said he bought it new in 2011 and raced C enduro Vet for 1 or 2 seasons. Has 97 hours on hour meter now plus he said maybe 40 more before meter. I'm a trail rider that doesn't get 'on it' too much.

    I figure now's a good time to give this a try, especially after reading this thread. Piston and cylinder look good to me but what do I know.

    Measured bore with cheap Lowes caliper and get 66.4 mm. It's a C size cylinder.

    I didn't buy parts yet but think I'll go the same route as Huskynoobee with the Wiseco. Wish me luck!

    image.jpeg image.jpeg image.jpeg image.jpeg
    juicypips likes this.
  6. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    None
    Other Motorcycles:
    2018 Gasgas XC250
    Looks good piston especially!
  7. mikebru Husqvarna
    AA Class

    Location:
    Ocean County, NJ
    Husqvarna Motorcycle:
    2009 WR250; 2012 TE449; 2005 TE450
    Should I just do new rings?
  8. lankydoug Husqvarna
    Pro Class

    Location:
    MO
    Husqvarna Motorcycle:
    WR
    Other Motorcycles:
    TM 300en
    What does the intake/carburetor side of the piston look like?
  9. juicypips Husqvarna
    Pro Class

    Location:
    gloucestershire
    Husqvarna Motorcycle:
    wr 360. 2002
    Other Motorcycles:
    Gas Gas TxT 300, Yamaha wr250f
    Man my stuff is never that clean!
    May need to start importing interceptor.
    Cheap calipers will struggle to accuratly measure the bore ideally you need internal bore guage, look like a T with telescopic arms.
    Personally i would do rings an whop it back together.
    But if your more safe then tight go piston kit with small end.
    shawbagga likes this.
  10. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    None
    Other Motorcycles:
    2018 Gasgas XC250
    No do it properly don't be cheap might bite you in the arse!
    Oldscool likes this.
  11. mikebru Husqvarna
    AA Class

    Location:
    Ocean County, NJ
    Husqvarna Motorcycle:
    2009 WR250; 2012 TE449; 2005 TE450
    Yeah, I usually take the cheap way out then regret it later. The presidents squint when I open my wallet!

    I do use Interceptor. I had to order it direct from Amsoil since nobody around me carries it.

    Here are some photos of the piston. That one face is the intake side.
    image.jpeg image.jpeg image.jpeg
    juicypips likes this.
  12. PowerKord Husqvarna
    AA Class

    Location:
    Notheast Ohio
    Husqvarna Motorcycle:
    2008 WR 250 Sold
    Other Motorcycles:
    2014 Sherco SE-R 250
    That piston looks good. I would still replace it. Then you should be good for a long time. What oil/ratio are you running?
  13. mikebru Husqvarna
    AA Class

    Location:
    Ocean County, NJ
    Husqvarna Motorcycle:
    2009 WR250; 2012 TE449; 2005 TE450
    I run 50:1. Straight Super pump gas.

    I don't race and don't ride a ton so that's probably why things are in good shape.

    When we ride we go a lot of slow single track and fast dirt roads.
  14. lankydoug Husqvarna
    Pro Class

    Location:
    MO
    Husqvarna Motorcycle:
    WR
    Other Motorcycles:
    TM 300en
    The intake side is the weak link on the WRs, yours is showing the first sign of wear, if I were you I'd replace the piston because when it gets to a certain point it will go fast and the savings is not worth the risk.
  15. mikebru Husqvarna
    AA Class

    Location:
    Ocean County, NJ
    Husqvarna Motorcycle:
    2009 WR250; 2012 TE449; 2005 TE450
    Thanks, done deal. I'm going new Wiseco, bearing, and gaskets.
    lankydoug likes this.
  16. lankydoug Husqvarna
    Pro Class

    Location:
    MO
    Husqvarna Motorcycle:
    WR
    Other Motorcycles:
    TM 300en
    If you look at my Nov 11th thread "Should Have knocked on wood" you will see pics of my wr250 top end with over 300 hours on it. It looks very similar to yours and was run on Dominator and Interceptor, I replaced the piston.
  17. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    Yep Mike, the piston is now a good spare or paperweight. I always try to cheap out when I can because George Washington is usually in there all by himself. But I also factor in time involved in the job. For me it was a no brainer.
  18. PaulD Husqvarna
    AA Class

    Location:
    Little Egg Harbor N.J.
    Husqvarna Motorcycle:
    2010 wr250( sold)
    Other Motorcycles:
    Triumph Sprint RS. Honda TRX300EX Be
    Just finished putting mine back together. Will start it tomorrow and begin break in procedure. Piston had very little blow by & just a little wear on intake side. My piston to cylinder clearance was .0031. Now at .0023. Should be quieter and hopefully the knocking sound while lugging will be gone. Picked up lots of pointers from this awesome forum Thanks guys!

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  19. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    Looking good. It's rebuild time around here on the Café
    juicypips likes this.
  20. mikebru Husqvarna
    AA Class

    Location:
    Ocean County, NJ
    Husqvarna Motorcycle:
    2009 WR250; 2012 TE449; 2005 TE450
    Placed my parts order about 30 minutes ago.