clintbigred 0 #1 Posted September 13, 2013 My kid wants a puller so I found a B-80 and I have a 18hp Magnum. What are the hp prtential out of one of these and what kind of mods are guys doing to them. Thanks Share this post Link to post Share on other sites
Jim_M 178 #2 Posted September 13, 2013 (edited) The only cheap mod would be milling the heads. You can contact Hackman or Vogel and get the cam reground and do a 3 angle valve grind for a little more power, but then it starts costing more money. I don't think anyone offers an adjustable flywheel for the magnum so the only way to advance the timing is to put a crank trigger setup on it. You would be better off with a Kohler Command V twin, if you want to go twin cylinder, there are tons of performance parts available for them. Edited September 13, 2013 by Jim_M Share this post Link to post Share on other sites
baerpath 517 #3 Posted September 14, 2013 Lakota and Super Cub both offered a adjustable flywhell for magnum twins. You can also swap the rods and jugs from a mag 20 or if you can find one use the crank from a KT19 or KT21. I have a Vogel cam in my KT it worked well . Share this post Link to post Share on other sites
chris11 184 #4 Posted September 14, 2013 I machined the coil mount so i could ajust timing. 3 angle valve job bored 40 over. put a # 30 carb. Removed magnets from fly wheel, took off stater. machined heads about .020. ajust valve lash. I havent ran out of power at all. Share this post Link to post Share on other sites
clintbigred 0 #5 Posted September 20, 2013 Thanks for the tips. Chris where did u get urn pistons at? Share this post Link to post Share on other sites
chris11 184 #6 Posted March 7, 2014 I got the parts from Parts tree just a .040 over Share this post Link to post Share on other sites
