Hosk Engineering
Hosk Engineering
I put together a bunch of images I am using to make my own oil change reference so I thought it would be best to just post it here to share. Im using a bunch of borrowed references and images so hopefully I dont offend anyone. Just grabbed a bunch of information I put together from all over and wanted to consolidate it all in one location.
OIL REPLACEMENT AND FILTER CLEANING
1. Gather proper tools and materials:
Materials:
a. Filter Element (screen)
b. Basic requirements for an oil change:
c. Oil Filter Screen
d. Sump Oil Filter Strainer Plate Gasket
e. Sump oil filter
f. Drain plug washers (2 packs so you have extras on hand for future use)
g. Sump plate gaskets (several uses then replace)
c. Screen filters (it's nice to have an extra so you can swap a clean one in at oil changes.
d. If the old sump filter is torn consider repairing it.
2. Place an oil pan under the engine.
There are two large drain plugs (They are 27mm)on the bottom of the motor.
3. Remove the drain plugs and drain the oil.
Note: Because this is my first oil change and the bike has sat for 20 to 25 years Im filtering the oil
4. Filter the oil through a coffee filter
--Look for pieces of black plastic from the cam chain guide, it will need replacing
--Also ALU pieces, normally cam chain hitting the case,
--Large bits may be 5th main gear or 3rd pinion gear dogs
--Crank bearing cage pieces have been found
REMOVE THE SUMP OIL FILTER
--The sump filter is the "rock" catcher.
--It stops chunks rubber that escape from the cam chain guides and other bits that could get into the system.
--If you are familiar with automobiles, it compares to the screen on the oil suction tube inside oil pans.
1. Remove the 6, 10mm bolts holding the plate
NOTE:
I plan on replacing my sump filter since it is so old but most people should just have to clean them.
--There are a lot of repair and modification suggestions out there as well.
2. Remove from the plate
3. Clean the filter
--Any kind of solvent or even gasoline can be used to soak the strainers (filters).
4. Re-install the sump filter
NOTE:
Don't exceed 7 ft-lbs when you reinstall the sump plate.
FILTER ELEMENT (SCREEN)
1. The filter screen performs the final filtering and is located behind the little cover in the right engine case.
2. Remove the filter cover and oil filter securing bolt.
3. Slip the filter element (screen) out and clean.
4. Clean Filter
5. Install the filter and filter cover.
--Filter torque: I 1.0 m-ko f7 f&lb)
FINAL STEPS
1. Reinstall the drain plugs. (Make sure it is tight.)
--Drain plug torque: 4.4 m-kg (32 ft-lb)
2. Add oil through the dip stick hole.
Oil quantity:
2.0 lit (2.1 qt): periodic oil change
2.5 lit (2.6 qt): engine overhauling
Here are some choices for oil:
Yamalube 4-cycle oil or SAE 20W/40 type “SE” motor oil (from the manual)
20w50 or 20w40 should work fine too. (people use diesel oil because it has higher levels of detergents similar to what all oils used to have decades ago)
I have heard that 20/50 castrol is a good choice because it works on the engine, forks and even the chain
Shell Rotella 15w40 diesel oil (15/40 is not "thick stuff".most people use 20W50 motorcycle oil)
I also included these Oil Flow diagrams I found to show how it all flows.
OIL REPLACEMENT AND FILTER CLEANING
1. Gather proper tools and materials:
Materials:
a. Filter Element (screen)
b. Basic requirements for an oil change:
c. Oil Filter Screen
d. Sump Oil Filter Strainer Plate Gasket
e. Sump oil filter
f. Drain plug washers (2 packs so you have extras on hand for future use)
g. Sump plate gaskets (several uses then replace)
c. Screen filters (it's nice to have an extra so you can swap a clean one in at oil changes.
d. If the old sump filter is torn consider repairing it.
2. Place an oil pan under the engine.
There are two large drain plugs (They are 27mm)on the bottom of the motor.
3. Remove the drain plugs and drain the oil.
Note: Because this is my first oil change and the bike has sat for 20 to 25 years Im filtering the oil
4. Filter the oil through a coffee filter
--Look for pieces of black plastic from the cam chain guide, it will need replacing
--Also ALU pieces, normally cam chain hitting the case,
--Large bits may be 5th main gear or 3rd pinion gear dogs
--Crank bearing cage pieces have been found
REMOVE THE SUMP OIL FILTER
--The sump filter is the "rock" catcher.
--It stops chunks rubber that escape from the cam chain guides and other bits that could get into the system.
--If you are familiar with automobiles, it compares to the screen on the oil suction tube inside oil pans.
1. Remove the 6, 10mm bolts holding the plate
NOTE:
I plan on replacing my sump filter since it is so old but most people should just have to clean them.
--There are a lot of repair and modification suggestions out there as well.
2. Remove from the plate
3. Clean the filter
--Any kind of solvent or even gasoline can be used to soak the strainers (filters).
4. Re-install the sump filter
NOTE:
Don't exceed 7 ft-lbs when you reinstall the sump plate.
FILTER ELEMENT (SCREEN)
1. The filter screen performs the final filtering and is located behind the little cover in the right engine case.
2. Remove the filter cover and oil filter securing bolt.
3. Slip the filter element (screen) out and clean.
4. Clean Filter
5. Install the filter and filter cover.
--Filter torque: I 1.0 m-ko f7 f&lb)
FINAL STEPS
1. Reinstall the drain plugs. (Make sure it is tight.)
--Drain plug torque: 4.4 m-kg (32 ft-lb)
2. Add oil through the dip stick hole.
Oil quantity:
2.0 lit (2.1 qt): periodic oil change
2.5 lit (2.6 qt): engine overhauling
Here are some choices for oil:
Yamalube 4-cycle oil or SAE 20W/40 type “SE” motor oil (from the manual)
20w50 or 20w40 should work fine too. (people use diesel oil because it has higher levels of detergents similar to what all oils used to have decades ago)
I have heard that 20/50 castrol is a good choice because it works on the engine, forks and even the chain
Shell Rotella 15w40 diesel oil (15/40 is not "thick stuff".most people use 20W50 motorcycle oil)
I also included these Oil Flow diagrams I found to show how it all flows.