classic motorcycle forum

This engine was never made to be a racer and will not make a good racer.
In the 1920's Villiers made three 175 engines, the Sport, (your engine), the Super Sport and the Brooklands. The Brooklands engine was the racer, the Super Sports was the sporting engine for road bikes and the Sport was the standard road engine. They are very different engines and the Sport cannot be upgraded to either Super Sport or Brooklands standard.
Your Monet Goyen will make a very good vintage road bike if you can get it running properly.
Cheers,

Ok!

the engine of this bike is the sport engine?






Regards
Guille

Hello Guille,
Your engine is a 57.15mm bore x 67mm stroke 172cc Sports made by Villiers from 1924 to 1932. The T prefix denotes it has ordinary 'petroil' lubrication and not the Villiers Autolube system.
It shares many parts in common with the rest of the Villiers range except for the piston which can be difficult to find. Pistons for the other 172 Villiers engines of the period, the Super Sports and Brooklands are not interchangeable with yours.
Information is easily found, BMS, www.brucemainsmith.com have a good selection of Villiers literature and general information can also be found in early editions of 'The Villiers Engine' by B E Browning and 'The Book of the Villiers Engine' by Cyril Grange.
Cheers,

Hello,
Thanks for the info,
the oil system itīs by handpump?
In the front of cylinder have a oil tube....
How itīs the oil circuite in this engine?
Here photos of the cylinder clean...





regards
Guille