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Dyna engine oil is on the left side bottom of the oil pan near where the jiffy stand rests when up and straight in from the side. The primary is under the middle of the primary case on the left side facing the ground and the transmission is under the right side of the oil sump case about mid way from front to back. All are 1/4 inch ALLEN socket heads inside 5/8 inch hex plugs. All use an o-ring and thread sealant.
Softail is the same except the engine oil drain is on the right side at the rear of the frame down tube near the swing arm attachment point and faces the ground.
Touring is the same except that the engine oil drain plug is on the left hand side front of the oil pan facing the front.
Sportster engine oil drain is on a rubber tube hanging down under the frame near where the jiffy stand rests when in its up position and the transmission and the primary use the same drain plug and are the same oil. The engine oil plug is a 5/16 inch plastic plug held in place with a mini worm screw clamp with a plain screwdriver or ¼ inch hex worm drive fitting.
You need to say how the bike is running, where the oil leak is coming from and see if you have any engine codes set. If you cannot easily find the source of the oil leak clean it all down and dry it and run it a short while until you see oil at a particular location and then it you still cannot identify precisely where the leak is coming from clean and dry it again and then spray Tinactin foot spray all over the area closest to where the oil reappeared and run it a little bit and the oil leak will be made evident to you by wetting the foot spray area.
I's possible for oil to come from a lot of places and wind up on the bottom of the engine block. It could be coming from either side or the front of the block. I could be leaking from the o-ring that seals the engine from the primary on the left side, or the cam cover on the right side or the oil filter on the front. The oil leaks out and then the wind blows it around while riding. The best way to find it is to wash the bike thoroughly and then go for a short ride. When you get back, Take toilet tissue and wipe around the bottom of the bike. If you any oil whatsoever, the toilet tissue will show it.
Im guessing this is an automatic, theres a trany dipstick, engine should be at operating temp and the truck level remove the dip stick and wipe clean then reinsert and pull out the fluid should be in the hass maxs. if this truck is manual trans then the trany is checked from under the truck, remove the fill plug on the side of the trany and fill unttil oil runs out the fill hole. hope this helps.
the oil drain plug faces the front of the bike on the left front of the oil pan that is under the transmission. the transmission drain plug faces straight down on the right side of the same oil pan. the primary drain is a 40 torx plug just under the large derby (clutch) cover on the left side. Hope this helps, if you need more help just ask. Brian
The tank on your Road King is on the bottom of the transmission. Look underneath the transmission and you'll see two drain plugs. The plug on left front of the oil pan is the engine oil drain. The plug near the center of the pan is the transmission drain plug. Good Luck, Steve
Spray it off at the car wash to remove all the oil , then spray Right Guard (Yes, that Right Guard) on the area of the leak. It will show up, but you may not be able to see exactly where. There are a couple spots where it can leak. The jackshaft oil seal, as you said, transmission output shaft (clutch shaft) on the trans itself, the inner primary seal where the trans shaft runs thru, the engine sprocket shaft oil seal, inner primary O-ring, the bolts that hold the inner primary to the engine/trans, the primary chaincase gasket and the drain plug. Hopefully when you get it apart, you will see which seal is leaking. If not, replace them all. Still want to fix the leak? LOL
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