Suzuki Quadracer HQ

LT500R Quadracer => LT500R - Engine => Topic started by: ATVMXR on February 23, 2014, 07:10:55 am

Title: Re: Piston slap, lose compression?
Post by: MotorGeek - Jerry Hall on February 23, 2014, 07:43:41 am

Quote from: ATVMXR on February 23, 2014, 07:10:55 am

Last time riding the hybrid, the motor seemed very noisy at idle, which I presume is piston slap.  However it still has lots of compression.   Doesn't a loose piston correspond to a loss of compression?

You can have good compression and a very loose piston.   This is very common with forged pistons especially on the 250 and 500 forged pistons. 

Forged pistons collapse rather quickly and start to slap (make noise).

There is a very common misconception that worn rings cause piston slap.  Piston slap is only caused by excessive piston to cylinder clearance.   RINGS DO NOT MAKE NOISE REGARDLESS OF THERE CONDITION.

Title: Piston slap, lose compression?
Post by: ATVMXR on February 23, 2014, 07:10:55 am

Last time riding the hybrid, the motor seemed very noisy at idle, which I presume is piston slap.  However it still has lots of compression.   Doesn't a loose piston correspond to a loss of compression?