You know if I was going to pass anything on it would be to never forget sh!t happens,things break,yes you can always go bigger but that's not always better starting out.but spend the money for quality parts once,it will save you more than just money in the long run.Don't try and be a hero,start out on the pus hills and learn your buggy,it's not always how good of a driver you are but how you react to what your buggies going to do,and everybody's buggy and feel is different so it will take awhile to get it where you like it but that's a never ending thing your always changing things up and that's part of the fun.you can take a 1641,3 rib starting out and have a blast.then go up to a 1915 with the first rebuild,maybe good set of heads,can run this engine anywhere you need to go for years as long as you keep air oil and gas clean,maintenance is key to longevity.then say four five years into it,and slowly buying bigger motor parts and maybe investing in a good tranny you can go bigger if you want to or put that money towards strengthing the buggy but after this long you will know more of what you need for what you like to do.it's not cheap no route you take,get cheap out of your head,it cost money to play and the harder you play the more you pay,just common sense there,and unless you know someone personally or have reliable people helping you,if it sounds to good to be true it probably is,seen a lot of hard feelings over buying used stuff,so remember think before ya leap,now build it the way you want to,lol.and good luck! Chad