So my 2013 wr has about 90hr took compression test and still 195 psi but it should be time for a piston and rings you would think. I put about 60 hr on a year so there is no way it would make another 60hrs or would it. Haha. I have been running amsoil dominator oil at 38/1 with premium gas mixed with 1/4 vpc12 race gas.
-
Hi everyone,
As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.
When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.
Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.
Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.
Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.
Thanks for your patience and support!
125-200cc 90 hours on wr165 still like new compression
- Thread starter Pedec
- Start date
The Wally machine lives on...I keep reading and hearing so much good stuff about these bikes I am almost wanting one
lankydoug
Husqvarna
Pro Class
What I do is a compression check and inspect my piston by looking at it through the intake with the reeds removed and through the exhaust with the pipe removed. 250s are bad about wearing and cracking the piston skirt on the intake side so I have a look every 6 months. I also look at the rings and see if they have any up and down play or if the piston just below the rings is showing signs of blow by. I really expected to have done the top end a long time ago but it looked almost new 4 months ago even though it's 5 years old. I'm sure your 165 sees more rpm than a 250 but it's not likely to let go all at once so maybe you should check yours more often and maybe if your piston looks good then just replace the rings and run it some more. I attribute the long life to proper tuning, good mix oil and good fuel.
wallybean
Mini-Sponsor
If you are wringing its neck a lot it is probably safer to do a new top end. I have put over 160 hours on a 165 piston and it was still easily in spec for piston gap and the ring groove was still tight but I am not a top end rider. These pistons don't have a particular wear specific point other than the exhaust bridge. Keep your old piston as an emergency back up.
Definitely inspect the piston for wear and at the least re-ring it.
Definitely inspect the piston for wear and at the least re-ring it.
I do wring it neck a lot so I will do piston and ring while apart. There has been a couple times stuck or in bad spots were it was held wide open so long I was thinking that had to have hurt it but I guess not. Never had it overheat or loose clutch even clutch feel never faded. Was thinking about new yz250x but changed my mind this bike is just to fun to ride.
justintendo
klotz super techniplate junkie
my 88 250 has 215 psi after well over 200 hours...so its not crazy. its always been jetted right, klotz super techniplate, warmed up rode easy before pounding on it, and a clean air filter..i bought the bike in 98 or so as NOS so im only owner.. im doing a topend first over just out of fear the stock cast piston will break. ring is still in spec.
The stock piston on a 88 husky was probably forged.
justintendo
klotz super techniplate junkie
i know all the factory units were mahle on the primary kickers, wasnt aware any were forged.
Well got piston out and looks very good like new almost inside very bright and shiny for 90hours. Ring end gap measured 0.457mm or 0.018 which is really good looks like it could have went a lot longer. No carbon deposits. Not sure if the Lectron or amsoil is what helped it last so good I rode it as hard as I could. What should new ring end gap be. Cross hatching still looks good in cylinder.
Attachments
wallybean
Mini-Sponsor
That is typical running with amsoil 2T oils. New end gap is ~.011", .018" is about when you should re-ring. Piston is good for at least that many hours again. Most of your ring wear is going to be at the exhaust port bridge and my guess is it is starting to get a sharp edge there.
Ok so for everybodys reference I feel fairly comfortable telling people they can run 80-90 hours as long as jetted right with good oil. I very rarely use the low end on bike if I do it right back to top end so even if motor is rode hard this motor combination is very reliable. Another note is my bike never has any spooge out the silencer and believe the lectron can be set to run perfect and stay that that way once set. Thanks Wallybean and after new piston and rings and getting suspension revalved hoping I get another 2 years or 90 hours out of bike and will know next time to just order rings since the piston I pulled out is in great shape and can be reused next time if needed. How long is cylinder plating usually lasting will be next question?