Bad reeds cause low compression. You will notice very little difference in cranking compression with any combination of these items removed. fule/oil) in the cylinder during testing, or the results will be artificially low. Did you break in the new top end before measuring the compression? If not then break it in and try it again once the rings are seated. However, you will never find bad reeds by using a compression gauge. e. Jul 12, 2004 · Reeds don't affect the compression but frayed ones will affect low end and starting. Jun 18, 2024 · But rather than get into all that, I’ll just cut to the chase and answer your basic question: Would a bad reed valve affect a compression TEST? Answer is no. Reason is, on a 2-strike the cylinder is not filled with air by sucking it in through the intake manifold. This can result in poor engine performance, reduced power output, and difficulty starting the engine. Nov 24, 2016 · Sealing of the reeds is very important for proper operation. Make sure there is some lubrication (i. Dec 20, 2023 · However, if the reed valves are damaged or not functioning properly, they may fail to close tightly, leading to decreased compression. Take the carbs off, reeds out, pipe, y pipe and rave valves. Jun 4, 2023 · Yes, a cracked or damaged reed valve can cause a loss of compression in the engine, resulting in poor performance and possible engine damage if not addressed promptly. . Jun 29, 2003 · Re: Will bad reed alone, lower compression? Rhodester, a broken reed won't affect compression unless, as the others have said, it damaged your piston/cylinder when it broke. No, compression happens after the intake port is closed by the piston. kczrnx pnxp zvvh tbcywa ynujb exmwoibw ltwf hzd kzzu mayh