My 1200C sportster now has about 500 miles. Occasionally, when shifting up, it will not shift the first time and will on the second try. I had the dealer look at it but obviously it did not happen during the test ride. I read that Spectro 6 Speed trans oil 75/140 is the recommend oil. I am wondering if I should have it changed now. I was going to wait till the first 1000 mile maintenance to have all three oils changed. thanks.