2 Stroke Connecting Rod Play

2 stroke dirt bike forums.

2 stroke connecting rod play. This video will show how to rebuild a two stroke crankshaft. We will be highlighting three special tools. 2 stroke dirt bikes honda. Coneccting rod crank bearing play.

Two from k l and one from ktm. 89 honda cr250r stock 89 kdx200sr with pc pipe. Describing some misconceptions about connecting rod side play. For example say you re building a stock small block 350 chevy with 5 7 inch rods and a 3 48 inch stroke.

The rod ratio in this engine would be 5 7 rod. Divide rod length by the crank stroke and you get the rod ratio. Subscribe if you wan. Rocking side to side isn t and movement up down is a good sign the big end bearing is weak.

Rod ratio is the mathematical relationship between the overall length of the connecting rods and the stroke of the crankshaft. It is probably way more than 3mm which means the crankshaft play is not critical. Another crank bearing question. Consider also the side play of the connecting rod at the piston end.

Every crank i have ever seen in a 2 stroke has side to side rocking play and is totally normal and acceptible. A teeny bit of sliding side to side is normal. I hope it can help you. If made any mistakes please let me know with a comment.

Atv utv yamaha. 2 stroke design spreadsheets 2 stroke tuners info my last two bikes.