i have a 03' Honda Recon es. I have had for 5 years now and just this week it would blow blue smoke on and off. it isnt a big blow just a little blow. it has a uni air filter in it (thts clean) it has the recommended engine oil(10w. 40). it has the right amount of oil also. it idles right, runs like it always did, and shifts right. it set for all winter last year in my garage with nuthing done with it. do u think it is just oil build up on the cylinders or is it something else?