50 009 815 for ø 50–110 mm KS art. Of course, we will always respect the do-not-track (DNT) setting in your browser. in contact forms). Recommended minimum is .060". In this case, no tracking cookies are set and no tracking functions are loaded. We then use a liberal coating of Redline assembly lube. Chrome plated piston rings must not be installed in chrome plated cylinder liners. I broke a ring during the install, can I just use OEM rings with this piston? Be sure to thoroughly lubricate wrist pins and piston pin bores with an assembly oil to prevent galling on initial fire-up. Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future. Step 3) End gap: all Fuel Moto kits come with the ring end gap pre-set.
Ring orientation; Ring end gaps; Ring Dimension terminology; My ring pack has 3 rings, but my piston only has 2 ring grooves.
If the rings don’t have a dot or letter to mark “up”, check the ID of the ring and they should be beveled. Therefore, the piston must also have valve relief pockets that switch sides. The major thrust direction is the side that is against rotation. All Rights Reserved. Piston Orientation: Rights, Lefts, Tops, and Bottoms, Mixin' Gas, Makin' Memories: 2020 Wiseco 2-Stroke MX World Championships, Polaris RZR: Rebuilding the Legends with Wiseco, 2020 Wiseco 2-Stroke MX World Championships Are Back On, Loretta Lynn's Amateur Motocross Championships Daily History | Wiseco 2020, Loretta Lynn's Amateur Motocross Nationals From the Beginning | Wiseco. Very rarely will they be mis-boxed, but it does happen A good mechanic will leave nothing to chance. Or was the piston made incorrectly? WARNING: It is important that the correct number of locks are installed in each piston or severe engine damage may occur. If a sharp edge is present it will cause excessive piston skirt wear. Remove carbon residues at upper unused area of the cylinder liner. Stothers also explains that piston skirt design is another critical aspect. The gap should be a minimum of .010”. Piston rings are subject to wear as they move up and down the cylinder bore, due to their own inherent load and due to the gas load acting on the ring. “Some pistons have an offset wristpin and would need to be installed properly to have the desired effect of reducing piston noise. Rings having a “pip” mark or dot on the side of the ring must always be installed with the “pip” mark or dot toward the top of the piston. Figure 2 also contains the reason for the poor oil control. Rings with a groove in the outside diameter and a “pip” mark or dot on the side must be installed with the groove toward the bottom of the piston and pip mark towards the top of the piston. Proper cylinder finish (honing), ring end-gap, and lubrication are critical to achieving optimum ring seal.
<>/Metadata 2 0 R/Pages 3 0 R/StructTreeRoot 5 0 R/Type/Catalog>>
2 0 obj
The oil rails may be installed without modifying the end gap. “When we refer to ‘rights and lefts’ we are referring to how the valve orientation is on that specific cylinder,” Stothers adds. For example, if the engine rotates clockwise when viewed from the front pulley the major thrust would be to the left (against rotation).”.