Hey guys
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I just got an '03 Fatboy, and as it's my first Harley-Davidson, I'm a newbie.&nbsp\\; I decided today I'm going to change the oil with Amsoil 20w-50.&nbsp\\; The owners manual says only to drain the oil tank and change the filter, and you're done.&nbsp\\; However, I see two more drain plugs (allen head) that appear to be for the crankcase.&nbsp\\; Do I drain these as well?&nbsp\\; I know, I know, I need to get a service manual.&nbsp\\; Should I get a factory one, or does somebody like Clymer make a good one for the TC88 Fatboy? Or both?
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Thanks, Mark&nbsp\\;
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You have 3 sumps on your bike. Engine, Trans, primary chaincase.
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You want to run the 20w50 in your engine and primary and get some Amsoil 75w90 or 75w110 SVG gear oil for your trans.
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Change the engine &amp\\; primary at 5000 miles or 1 year
Change the trans at 15,000 miles or 2 years
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You will like the amsoil very much.
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But do get a factory service manual. It will save you big $$ and show you the way to do everything. You can get on from Zanotti's HD on line or for about $60 at you dealer. Zanotti's is a few bucks cheaper.