I have a 2001 fxstb harley and while riding all the oil leaked out

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once a vehicle has been serviced with synthetic oil your not suppose to ever use any other oil. My opinion would be to drain the oil again and change the seal on the jug where it leaks as soon as possible and add synthetic oil. also make sure the mechanic you have your Harley serviced at is aware of this or your bike will get messed up fast. Is this the knight train limited edition that came out with air suspension? If so badass!!!

cylinder is always leaking oil at the base. hope that would help you

under your engine there should be a thing called a sump nut cant miss it is right under your engine and is a size 17 it is very obvious simply turn it and take off careful though is messy so turn it off completely when off and all oil gone pour new oil through the bike to run out any old oil would be a good idea to do the filter at the same time not sure where placed on a harley but shouldne be hard to find

look on the bottom of the oil tank and follow the hose that goes down by the transmittion and there is a plug at the end of it

Evo or TC88?

check with midwest for those specs.....most riders set oil level to accomodate their ridint style...more oil firmer ride...less oil softer ride

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

You will need approx.8 to 9 ounces in each tube if they are still wet.If they are dry complete capacity is 10 ounces.I hope this helps.