Will it idle down or when started just sit there and rev very fast no matter what? Go to 6 oz oil minimum and 8 oz is better. Set toe in 1/16" to-1/8". Do you weigh 300 lbs? It's only an 80cc engine. Stock carb is pretty small. Stock reed cage is restrictive. Gear ratio? You said it's an MC model. 3...

Not sure but I have the other style if you need it. I matched one straight out of my BDC14 carb.

Long or short. Better post a picture is you want a matched pair. We also have a for sale wanted board.

Are the petals flattened / smashed where they rods attached or do they have the tab welded to the petal? Short swing mount or long? Enough room behind the seat to put a tank but have tubing welded to the bottom of the frame for a cross rod throttle linkage? Mine had 4" & 5" hands wheels and a chilto...

Long way from "new"......... bore looks max and off center. Block decked. I like the center punch marks to hold the seal in.

Almost positive it's a Bird. They were advertised in the back of Boys Life magazine. Not really a race kart.

The hunt is just part of the fun. WHen you meet more people you can pay for it & they will pick it up for you. Works well but you will owe a LOT of favors!

Bob, I got the needle. PM me your address.

Tom knows more about a Simplex than I ever will.

The rear axle is out of a different model Simplex with side mounts. Yours appears to be a dual frame with a dual side mount rear axle.. I didn't even know they fit. Looks to have an aluminum bolt in floor pan not the steel welded in floor pan. It also has the heavy steel petals. Is the steering whee...