Those were the best! I had one when I worked for the USDA that I road 6-8 hours a day every day for 5 years..changed the oil twice a month and it never let me down. Sold it to my friend that has 2 boys that road the mess out of it for 10 years or more and he just sold it last year still running like a top. If you keep the oil changed I think those things will run forever!! Enjoy