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Its a splash fed oiling system. The cam chain brings oil up to the head. The reed valve is strategically placed to keep the oil in the crankcase at a certain level. Too much oil in the crankcase takes away horsepower as the crank pushes through the oil. So when the piston comes down some of the crankcase pressure is utilized to push excess oil out through the reed valve into the clutch side area.
The reed valve should be checked every 100 hours. If the reed valve is damaged, worn out or if a foreign object is stuck in it holding it open, then the exhaust will smoke excessively but it will not harm the motor. The only downside is that you will lose a little horsepower and consume more oil than normal.
The reed valve should be checked every 100 hours. If the reed valve is damaged, worn out or if a foreign object is stuck in it holding it open, then the exhaust will smoke excessively but it will not harm the motor. The only downside is that you will lose a little horsepower and consume more oil than normal.
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One more thing.....the oil pump was added in 1997 but I believe that all it does is push oil through the paper filter. It doesn't pressure feed the oil to any internal parts.
The reed valve oiling system was invented by Husqvarna, came out in 84 I think and was used for a few years. When the Husky engineers started Husaberg they continued on with the oiling system that they developed.
The reed valve oiling system was invented by Husqvarna, came out in 84 I think and was used for a few years. When the Husky engineers started Husaberg they continued on with the oiling system that they developed.
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How do I check the reed valve I have had the mesh screen out and cleaned it not metal or any bits of dirt so that's good news Gona run bike for few hours to break it in as motor not done a lot since rebuild
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How do I check the reed valve I have had the mesh screen out and cleaned it not metal or any bits of dirt so that's good news Gona run bike for few hours to break it in as motor not done a lot since rebuild
The reed valve is under the clutch basket.
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Cheers pal I'll need to check it at some point had it out for 2hrs today ran good no smoke and Drained oil when I got home and got just about 1 litre so not burning much
Excellent
ned37
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this topic got me thinking about oil delivery on the pre oil pump berg engines. iirc when husky introduced the 510 4t, the oiling was done by reed valves. since i've never had an early berg apart, i've often wondered if they used the same system they created for the husky before it went to italy. an article described it as:
"with an ingenious oiling system that used vacuum produced in the crankcase to lubricate major engine components. Two reed valves in the cam case, that held a pint of motor oil, lubricated the entire motor.
Here’s how it worked: When the piston went up, vacuum was created in the crankcase, and a reed valve at the bottom of the cam case would open, and allow oil to be introduced into the needle roller bearing crankshaft and cylinder assembly.
When the piston came down, the resulting pressure would force the oil out of the crankcase, back into the cam case via a directional reed valve at the top of the cam case. The oil in the cam case also traveled up the cam chain, and lubricated the needle-bearing camshaft and related valve assembly."
after the oil pump came along, the only purpose of the reed valve was to maintain the oil level in the crank chamber. or was it?
can anybody shed any more light on this?
inquiring minds, etc, etc
"with an ingenious oiling system that used vacuum produced in the crankcase to lubricate major engine components. Two reed valves in the cam case, that held a pint of motor oil, lubricated the entire motor.
Here’s how it worked: When the piston went up, vacuum was created in the crankcase, and a reed valve at the bottom of the cam case would open, and allow oil to be introduced into the needle roller bearing crankshaft and cylinder assembly.
When the piston came down, the resulting pressure would force the oil out of the crankcase, back into the cam case via a directional reed valve at the top of the cam case. The oil in the cam case also traveled up the cam chain, and lubricated the needle-bearing camshaft and related valve assembly."
after the oil pump came along, the only purpose of the reed valve was to maintain the oil level in the crank chamber. or was it?
can anybody shed any more light on this?
inquiring minds, etc, etc
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It's very intresting buddy and must work well as used for years .the thing I love about the old berg is that it needs tlc constantly to keep it on form like a race engine would it's prob just my view but I think it's a joy to ride slow but if u open the taps it's insane the torque
it's prob just my view but I think it's a joy to ride slow but if u open the taps it's insane the torque
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reducing pressure in the crank cavity relative to the gearbox increases apparent oil pressure at the big end if there is a passage connecting the 2
which is a great idea except at some point the factory added a second big hole between the gearbox and the crankcase probably trying to increase the amount of oil in the crank cavity with the new cases/balancer
the early engines did not have a second hole between the crankcase and the gearbox or it would seem even any kind of feed to the big end just splash like a 2T
putting a one way valve on the breather doesn't change the pressure differential across the big end lube circuit and running the splash lubed top end in the vacuum created removes the possibility of oil mist as lube
2 reed valves gives you the bets of both ideas similar to "modern" 4ts with a scavenge pump (all of them)
http://husaberg.org/mechanical/1085-crankcase-venting-101-a.html
which is a great idea except at some point the factory added a second big hole between the gearbox and the crankcase probably trying to increase the amount of oil in the crank cavity with the new cases/balancer
the early engines did not have a second hole between the crankcase and the gearbox or it would seem even any kind of feed to the big end just splash like a 2T
putting a one way valve on the breather doesn't change the pressure differential across the big end lube circuit and running the splash lubed top end in the vacuum created removes the possibility of oil mist as lube
2 reed valves gives you the bets of both ideas similar to "modern" 4ts with a scavenge pump (all of them)
http://husaberg.org/mechanical/1085-crankcase-venting-101-a.html
ned37
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thanks bushie: i just reread (and didn't fall asleep this time) the cc venting 101 thread. if my thinking is on the right track, on the early engine, the hole in the end of the crank was probably not baffled like it is in the '01-up engines, or at least, not as much, allowing the vacuum to pull oil from the clutch side case into the big end. when the first oil pumps were used, the oil no longer was evacuated and the end of the crank was closed to the side case and just fed from the pump. when the hole up by the balancer shaft was introduced, it was prolly to balance out the pulsations, thus keeping the pump pressure from having to fight to pass the oil.
i'm still vague on how a filter screen was used unless it was located close to the crank left end pickup.
Happier: any chance of getting a pic of the housing on the '93? and is it possible it's a later pumped engine?
i'm still vague on how a filter screen was used unless it was located close to the crank left end pickup.
Happier: any chance of getting a pic of the housing on the '93? and is it possible it's a later pumped engine?
ned37
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thanks. it helped when i turned it 90* to the right. that's very interesting. i'd love to see an oil flow diagram for the early engines. it looks like it goes a long way to be drawn into the crank end. seems to take the same path as the pumped ones. must have been a ***** to prime a dry engine.
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