If you're referring to a .28 on a 40 size trsiner, you'll be lucky if it gets off the ground. (I'm betting it won't.)

Don't buy into those "horsepower" ratings posted by the manufacturers. They really don't mean anything becuse they're taken under conditions that are useless in the real world. (Anything over about 11,000 rpm on that mvvs 28 will be beyond the power curve, and only serves to wear out the engine faster.)

If the MDS is your only other option, use it. But those engine choices aren't the greatest either. (MDS has been said to mean 'M'ultiple 'D'ead 'S'ticks.)

Good luck,
Dennis-