Maintenance & Technical > KX500 Original
bike just doesnt seem right.
Goat:
Crank seals don't see any transmission oil. The only lube they get is from the premix that gets sucked down there before being sucked into the cylinder. If they haven't been changed in 5+ years I'm betting that is the cause which can lead to other failures.
Polar-Bus:
--- Quote from: Goat on April 21, 2011, 01:30:57 PM ---Crank seals don't see any transmission oil. The only lube they get is from the premix that gets sucked down there before being sucked into the cylinder. If they haven't been changed in 5+ years I'm betting that is the cause which can lead to other failures.
--- End quote ---
Doesn't the RH primary side crank seal come in contact with trans oil the resides in the clutch cover housing ?
Motorrad:
--- Quote from: Polar-Bus on April 22, 2011, 12:31:53 AM ---
--- Quote from: Goat on April 21, 2011, 01:30:57 PM ---Crank seals don't see any transmission oil. The only lube they get is from the premix that gets sucked down there before being sucked into the cylinder. If they haven't been changed in 5+ years I'm betting that is the cause which can lead to other failures.
--- End quote ---
Doesn't the RH primary side crank seal come in contact with trans oil the resides in the clutch cover housing ?
--- End quote ---
Yes
And shelf life of a nitrile seal is 5 years. Living on a climate controlled shelf away from heat oil and sunlight... How long do ya think life in a motor is??
Polar-Bus:
--- Quote from: Motorrad on April 20, 2011, 05:42:06 AM ---
--- Quote from: kelcrist on April 19, 2011, 04:04:13 PM ---it is not out of the question!!! if it were a honda id just change them and not give it a thought....
--- End quote ---
Ive always wanted to find another set of cases, to "work on" ...
as Id like to be able to change the seals from the outside...
I think its doable... with alot of work
--- End quote ---
I did the lower end in my '97 KX250, and if I remember correctly there is a series of casting lips around the OD of the crankcase seal bores that only allow the seals to be installed from the inside of the case. You could bore those nubs off and be able to install seals from the outside, but then my only concern thereafter would be the imfamous KX500 kickstarting "backfire" blowing the seals clean out of the bore(s) ! :-o
Motorrad:
--- Quote from: Polar-Bus on April 29, 2011, 04:00:42 AM ---
--- Quote from: Motorrad on April 20, 2011, 05:42:06 AM ---
--- Quote from: kelcrist on April 19, 2011, 04:04:13 PM ---it is not out of the question!!! if it were a honda id just change them and not give it a thought....
--- End quote ---
Ive always wanted to find another set of cases, to "work on" ...
as Id like to be able to change the seals from the outside...
I think its doable... with alot of work
--- End quote ---
I did the lower end in my '97 KX250, and if I remember correctly there is a series of casting lips around the OD of the crankcase seal bores that only allow the seals to be installed from the inside of the case. You could bore those nubs off and be able to install seals from the outside, but then my only concern thereafter would be the imfamous KX500 kickstarting "backfire" blowing the seals clean out of the bore(s) ! :-o
--- End quote ---
That would be step one.. The easy part if you will...
The lot of work part would be making some kind of retaining system like Honda uses..
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