How to Adjust Valve Clearance on Yamaha YZ250F 4 Stroke Motocross Bike
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I rebuilt the complete engine on this YZ 250F but I put it back in the bike without checking the cylinder head, today I measure the clearance between camshafts and valve lifters with the engine in the frame! So this should really help those who want to do their valve clearance because it is normal maintenance for a 4-stroke motocross ???????????? Symptoms you may know: your engine starts less and less well (or the bike does not start at all), or makes flames and pops when decelerating… Then it is likely that your valve clearances have become too tight A clearance that is too small - or even zero - means that when the parts expand, you have the possibility of having the valve that no longer closes properly and is no longer watertight Come on, let's take out the torque wrench, the set of shims and measure together the clearance between camshaft and lifters on the 5 valves! ???? To support the channel: go take a look at www.bylderz.fr 100% of the profits are used on the channel's videos, thank you for your support! Join me in my projects: http://bit.ly/39XFJUM More news on Instagram: / tristandurandbuilds LINKS TO THE PARTS AND TOOLS USED IN THIS VIDEO: Shim Set - 32 blades: https://amzn.to/3xirlBT Digital Caliper, 0-150 mm: https://amzn.to/3qUHjQw Box of 7.48mm Motorcycle Valve Stems (exhaust and intake): https://amzn.to/3yjPisA Digital Torque Wrench from 3 to 50 Nm: https://bit.ly/3AC2ivF Hello! I'm Tristan Durand! I live in New York and I tinker a lot ???? Right now I'm rebuilding wrecked, neglected, or just plain old damaged motorcycles... so I disassemble, weld, machine, and repair to get each of these bikes back on the road! Join me in my projects: http://bit.ly/39XFJUM Live updates of my projects on Instagram: /tristandurandbuilds If you have any questions, let me know in the comments and I'll be sure to help you out quickly ???? Thanks for watching and happy riding!
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