oil coming out of the breather???
#11
08-03-2009, 07:11 AM
#12
08-05-2009, 12:44 PM
Cruiser
#13
08-05-2009, 01:25 PM
HDF Community Team
Well, it is - but it shouldn't be.
Thing is, the oil expands a good bit when it's up to temp. Fill one to the bottom of the neck, especially on the horseshoe style tanks, ride it till it's up to say 160 or better and it'll almost pour out when you remove the cap. Also, with the smaller design of those type tanks and somewhat with the 4 quart tanks, the oil level varies greatly from upright to side stand position.
The oil level in the crankcase is also variable depending on how the bike had been run when it was shut off. Typically, if they are just idled around or started and stopped without being ridden and warmed up to operating temperature, you can get an accumulation in the case. The flywheel side will hold over a quart, but the normal level is nearer to half a pint. The oil drains from the heads and whatever oil goes thru the rod bearing via the pinion shaft only gets thrown around by the flywheel and the downward pressure created by the pistons blows what it can thru the breather gear. If the engine isn't up to temp, there is practically NO oil vapor on the flywheel side at low rpms. It's when the oil is in a vapor state that it travels most easily thru the breather gear where it cools to liquid and gets picked up by the scavange side of the pump. All this is "normal" but when you change the oil, if there is say as little as half pint extra in the case, you top it off cold, get it up to temps and next thing you know - it's way over full.
To make an already too long story short, when you change the oil with (or without) a new filter, leave it half quart low and ride it... all day or all weekend. Then fill to a normal level when you're done. Forget the book, forget the dipstick. Always better a bit low than overfull.
Thing is, the oil expands a good bit when it's up to temp. Fill one to the bottom of the neck, especially on the horseshoe style tanks, ride it till it's up to say 160 or better and it'll almost pour out when you remove the cap. Also, with the smaller design of those type tanks and somewhat with the 4 quart tanks, the oil level varies greatly from upright to side stand position.
The oil level in the crankcase is also variable depending on how the bike had been run when it was shut off. Typically, if they are just idled around or started and stopped without being ridden and warmed up to operating temperature, you can get an accumulation in the case. The flywheel side will hold over a quart, but the normal level is nearer to half a pint. The oil drains from the heads and whatever oil goes thru the rod bearing via the pinion shaft only gets thrown around by the flywheel and the downward pressure created by the pistons blows what it can thru the breather gear. If the engine isn't up to temp, there is practically NO oil vapor on the flywheel side at low rpms. It's when the oil is in a vapor state that it travels most easily thru the breather gear where it cools to liquid and gets picked up by the scavange side of the pump. All this is "normal" but when you change the oil, if there is say as little as half pint extra in the case, you top it off cold, get it up to temps and next thing you know - it's way over full.
To make an already too long story short, when you change the oil with (or without) a new filter, leave it half quart low and ride it... all day or all weekend. Then fill to a normal level when you're done. Forget the book, forget the dipstick. Always better a bit low than overfull.
#15
08-07-2009, 05:41 PM
Join Date: Mar 2009
Location: pa
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Well, it is - but it shouldn't be.
Thing is, the oil expands a good bit when it's up to temp. Fill one to the bottom of the neck, especially on the horseshoe style tanks, ride it till it's up to say 160 or better and it'll almost pour out when you remove the cap. Also, with the smaller design of those type tanks and somewhat with the 4 quart tanks, the oil level varies greatly from upright to side stand position.
The oil level in the crankcase is also variable depending on how the bike had been run when it was shut off. Typically, if they are just idled around or started and stopped without being ridden and warmed up to operating temperature, you can get an accumulation in the case. The flywheel side will hold over a quart, but the normal level is nearer to half a pint. The oil drains from the heads and whatever oil goes thru the rod bearing via the pinion shaft only gets thrown around by the flywheel and the downward pressure created by the pistons blows what it can thru the breather gear. If the engine isn't up to temp, there is practically NO oil vapor on the flywheel side at low rpms. It's when the oil is in a vapor state that it travels most easily thru the breather gear where it cools to liquid and gets picked up by the scavange side of the pump. All this is "normal" but when you change the oil, if there is say as little as half pint extra in the case, you top it off cold, get it up to temps and next thing you know - it's way over full.
To make an already too long story short, when you change the oil with (or without) a new filter, leave it half quart low and ride it... all day or all weekend. Then fill to a normal level when you're done. Forget the book, forget the dipstick. Always better a bit low than overfull.
Thing is, the oil expands a good bit when it's up to temp. Fill one to the bottom of the neck, especially on the horseshoe style tanks, ride it till it's up to say 160 or better and it'll almost pour out when you remove the cap. Also, with the smaller design of those type tanks and somewhat with the 4 quart tanks, the oil level varies greatly from upright to side stand position.
The oil level in the crankcase is also variable depending on how the bike had been run when it was shut off. Typically, if they are just idled around or started and stopped without being ridden and warmed up to operating temperature, you can get an accumulation in the case. The flywheel side will hold over a quart, but the normal level is nearer to half a pint. The oil drains from the heads and whatever oil goes thru the rod bearing via the pinion shaft only gets thrown around by the flywheel and the downward pressure created by the pistons blows what it can thru the breather gear. If the engine isn't up to temp, there is practically NO oil vapor on the flywheel side at low rpms. It's when the oil is in a vapor state that it travels most easily thru the breather gear where it cools to liquid and gets picked up by the scavange side of the pump. All this is "normal" but when you change the oil, if there is say as little as half pint extra in the case, you top it off cold, get it up to temps and next thing you know - it's way over full.
To make an already too long story short, when you change the oil with (or without) a new filter, leave it half quart low and ride it... all day or all weekend. Then fill to a normal level when you're done. Forget the book, forget the dipstick. Always better a bit low than overfull.
he is right on.............i ran the bike a few minutes after adding the oil after the oil change and it was 1" below fill neck...............the after riding for a while, it was back up in the fill neck.........it expands alot!!
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