Rebuilding a pressed pin crankshaft.

This instructable is for the mechanically minded and should be done with extreme caution as you will be working with heat, high pressure and high precision. This is applicable to both two-stroke and four-stroke crankshafts for single cylinder small engines ( dirt bikes, motorcycles, ATV's and snowmobiles.The first step is to measure the width of the crank webs so you can have the same distance when you finish.

Step 1 Checking out the crankshaft.

Mark the crankshaft webs as a referance to put them back in the proper alignment. also make sure there are no bends or imperfections on the webs since those will not be replaced. On this particular crankshaft (which is a four-stroke ATV crank) the pin is covered partially by the bearing and gear. ""Important"" YOU MUST LINE THE GEAR TOOTH BACK UP TO THE KEYWAY OR YOU WILL NOT BE ABLE TO TIME THE VEHICLE!!