Sorry disagree Raced Grasstrack for years on MX motors, Readily around, Cheap to build, and some companies do sell just motors, but need to keep basic engines for lower leagues, no tuning, will do about 12 meetings before any work needed, so its a real good cheap alternative, also old, has been ,call them what you like the more bikes built the more the Japs want to know, I have dealt with Kawasaki, Yamaha and Honda in the past if they think the will sale units and make money they will get involved, and they are already making these motors so they dont have to do anything, I think its a great idea, and it helps modern day bikes being so twitchy, and will cut down the amount of injuries, so its cheap safe, easy to buy, cant see a down side, and speedway needs a up side, and Pete is not the first person to say it, Graham Hurry, John Berry etc.