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Message: [QUOTE="viking20, post: 926532, member: 33877"] Engines can make some weird noises for sure ,...If you have a bad conrod bearing the noise will be a knocking sound , it will get worse real quick , and it wont run for more than minutes , before you feel something is really bad , or it will seize. Main bearings will give a knock at low revs , or a rumbling sound. Screaming , or whining noise is most likely a gearbox bearing , or something in the clutch. Piston skirt slap , will also give some sort of knocking at idle and low revs. A press is a hydraulic device , a stationary thing used in workshops etc. Do not attempt to use the vice at home for most of the things you need to do. It will be much better to use a hammer and drift on the bearings , be sure to only hit on the outside of the bearing surface when you install the new bearings. Reg the crank work , go to Eric Gorrs Forward Motion site ( link on the left ) Find the article on 2 stroke lower end rebuilding and crank rebuild. It will explain everything in detail. The shims used for adjusting side clearance on the crank , is simply added , or removed to give a bit of side clearance in the cases. Assemble the cases , and feel for play side way on the crank. What you want is just so much play that you can feel it . If there is no play at all , you will need fewer/thinner shims , and so on . You can use two thin shims instead of a thicker one , no problem. Dont forget to have the crank centered between the bearings first( the Eric Gorr article will explain ) The boring of cylinders and crank aligning can be done in many shops. Be sure to have a new piston ready for the shop to measure , and dont be afraid to tell them what the piston clearance is supposed to be , if you know the correct piston/wall clearance. If you have trouble getting work done locally , maybe Eric Gorr can help you out. Good luck ! [/QUOTE]

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