the baddest banshee Posted January 7, 2011 Report Posted January 7, 2011 how can i check if i have a bad bottom end bearing? i boght a engine unknown assembled i pulled cylinders do i have to split cases to check the crank bearings and rod lower bearing? Quote
BigRed350x Posted January 7, 2011 Report Posted January 7, 2011 how can i check if i have a bad bottom end bearing? i boght a engine unknown assembled i pulled cylinders do i have to split cases to check the crank bearings and rod lower bearing? You can do a quick n dirty lower end rod bearing test by trying to hold the crank still and lift the rod up and push it down. If it has any up and down play, then the bearing is bad. A little side to side movement is ok, but you don't want any up and down. As for crank bearings, spin the crank holding the rods. If you don't hear any weird noise or feel any rough-ness in the rotation and nothing feels sloppy... that's about all you can really check without pulling the crank and sending it to a shop to check it out. You can also put a dial indicator on the input and output shafts and check for runout and how true your crank is rotating. Quote
midlifecrisis Posted January 7, 2011 Report Posted January 7, 2011 Do yourself a favour as well brother, and get a clymers manual for the bike. Itll be the best $30 investment you can make. It gives you a run down on clearances etc.... and a troubleshooting area to get you started. I built my motor having no experience on 2 bangers with it, and the help of these guys! Good Luck. Quote
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