Not really having an issue, just had my manal

Your Sportster holds three quarts of Harley Syn3 oil. If you are not going to use Harley Davidson brand oil, use any good oil that is 20W50 weight and is rated for using in a diesel engine. Here in the States, it's a "C" rating. Such as SJ/CG4 on the API code. You can use either petroleum based oil or synthetic. Use one quart of Syn3 or Harley semi-synthetic primary and transmission lube. Any dealer should be able to order you an owner's manual. If there is not a dealer near you, find a friend that can obtain the book and mail it to you.