General Category => Engine & Transmission => Topic started by: WVbiker on December 22, 2014, 09:44:22 AM

Title: Engine RPM Range
Post by: WVbiker on December 22, 2014, 09:44:22 AM

Does anyone know what the normal rpm operating range of a stock Simplex model M 125cc engine is?

Title: Re: Engine RPM Range
Post by: pd on December 22, 2014, 12:17:40 PM

This might apply :

http://www.simplexservi-cycle.com/index.php?topic=1150.msg10052#msg10052

Pete . :)

Title: Re: Engine RPM Range
Post by: WVbiker on December 30, 2014, 09:03:32 AM

For those interested, I read a Simplex advertisement relating to the Simplex Automatic which lists its design improvements and specifications.  It states that the 125cc engine has a 6:1 compression ration and developes 4 hp at 4000 rpms.