Hello all,
I am looking into converting a 25cc Homelite and would like to get as much work done locally to save time and shipping. Can anyone tell me what the flywheel machining called for in all the convesion kits consists of? Is the diameter turned down to a certain measurement? Does balancing just consist of a static balance like a prop or do they actually spin these things and dynamically balance them? Any replies appreciated.

Rein

just have turned down to look like this pic. and it is best to balance it, just like a prop. I go a bit further a spin it up in my dremel on the lowest setting to feel for vibration. If I find any I balance it again. Use a drill and make small holes on the back side to lighten it where needed.

Don't know where you are at, but if you have the local machine shop do the machining, you're in for a rude awakening...most have a $150.00 to $300.00 min. charge...or $60.00 an hour charge if they like you, but it ya have a friend with a small lathe in is basement or garage ya come out way ahead...
People on here that are doing a lot of conversions may already have the parts made that you need, no fuss no muss..

The common conversion is cut the fins down to the front of the fly wheel, machine up a prop adapter that fits over the crank and against the now machined fly wheel and a spinner nut and washer...
It's not really that hard, so don't let it scare you...

Balance can be done static..taking small amounts off the heavy side with a drill, or a Dremil Tool..just don't take it all from one place and get thin spot..

I finally resorted to breaking the fins off with a pair of pliers and grinding the fins down smooth with a die grinder using a A-11 carbide burr. I then balanced them on a Robart High Point balancer. The Top Flight balancer will not support the weight. whatever you do, don't cut into the magnet or the steel counter balance part.

w8ye