hey, i have a 95 ex500 with about 4,000 miles on it. when i bought the bike, i was told that 20w-50 was used in the bike, (its the golden spectra stuff). i went to one of the shops here, and the guy said that 20w-50 is to thick, and i should put in 10w-40. im located in long island new york. the bike is basically stored for the winter season. should i start using 10w-40?what do you guys think and suggest? thanks!