I have a cylmer service manual for a 99-2005 FXD. it say the service interval for the trans & primary oil is 5,000 miles..


5,000 mile seems short, I changed my transmission oil today with about 6,000 miles and it looked in great shaped.. the primary oil with 4,000 ,miles was grey,


I think I read the new bikes have a 10,000 mile interval,


I hav ea warranty so I should stick to the official service schedule,


but what do you all think of this? My 06 sportster had a 10,000 mile interval, just wonder why my 03 dyna can't do the same..

 

If you register on the Harley website you can access the owners manual online. Just takes the vin. FYI

 

I go 10,000 on mine. I do run synthetic. My mechanic (indy) tells me there is no reason to with less than 10,000.

 

Clymer's is just staying on the extreme conservative side. If the oil is clean why change it? Your tranny has no connection to the combustion end of the engine.

 

I change all 3 when I change the oil/filter regardless of miles.

 

I change oil like I change underwear - long before I think I need to, regardless of the hole involved.

I don't think about it much. I don't have to sweat the price of the oils, filters, gaskets, or washers. It just feels good to change them often, and all at once. Waste? Yeah, it's a waste. But in 45 years or riding bikes into very high mileages, I've never had to rebuild one - not even the top end.

Oil, even expensive oil, is cheap.

 

I used to do 10k on trans and primary and 5k on engine. Mobile 1 in all holes with 75/90 gear oil in trans. Now I do all 3 at 5k because an extra $20 every 5k is cheap insurance.

 

I just changed my trans oil at 5k


...only cuz I opened the wrong drain plug

 

 

On my 07 HD says to change the engine oil at 5,000. The primary at 10,000 and the trans at 20,000. I plan to do the oil every 5,000 and the trans/primary every 10,000.