McBob.....better start studying port timing and the time value of ports. :!: The crank works off a centerline and will move the piston up and down farther but it’s so much more than that. Start looking at rod angle, port open time, dwell……..and the list goes on…….oh yea don’t forget it changes the c...

Wrong manifold but a variation should work for Jeff.

.010 shim stock about 3/8" wide and 6" long with one end curled in about 1/8" and 1" from the end. Pull drawer 1/2 way out and slip shim in each side. Drawer will slide right out. Just did it the other day.

I don't think gear drive will work with this manifold. Get ahold of some old mags and I'm sure you can find a picture. Lots of times they pulled one carb with a short rod (coat hanger / welding rod) to pull the second carb.

Woo Hoo Virg made it !!!!!

Hi & Welcome. A briggs is 5 HP and a 100 CC Mac is about 11hp & a 101 is about 14hp.

Bore size is bore size. You should be able to find a bike ring that will work. I have not set up a Mac with a L ring but on foreign engines we used the ring for controlling the ports.

Or collect your own library of vintage kart magazines........it's fun and another aspect of the sport.

or Homer Simpson.....DOOOOOOOOOOOOOOOO !

Hi McBob.....yea kinda a bummer to loose all that info. Hopefully it can be found and added to this forum...........I hope.....I hope.......

Bet jeff's face looked kinda like this when he pushed the button ......just teasing Jeff.