OutdoorKing Repair Forum Forums Restoring, Customising and Modifying Engines Villiers lightweight engine

Hi everyone
I picked up 2 Villiers lightweight engines (horizontal shaft) that look almost identical except for some minor visual differences, can anyone shed some light on the 2 different model numbers are they the same engine but different years/series or is there a difference in specs such as bore and stroke. Trying to work out if ones better than the other as I I can make one complete engine out of the two, I know there was a 50cc, 75cc and 150cc how do you tell the difference?

Model numbers are
2100x
2105x

Thanks BS

I took the heads off today and measured the stroke and they both seem to have the same travel unless one piston is shorter than the other which I won't know untill I strip it right down. There seems to be different markings on the pistons heads as well as a concave dip in one of the pistons.

Piston markings are
2100x - STD 16 Flat piston
2105x - STD 15 (40404) concave piston

Any info or history would be great. Thanks

Hi BS,

How are you getting on with these Lightweights? This thread might help

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/84426/VILLIERS_-_Lightweight_Horiz._.html

Would love one of these for my Villiers collection but they just don’t seem to come up in Brisbane.

Hi paul_c

I haven't really got stuck In to them yet, there on the backburner at the moment untill I finish off my current restorations and the 101 million jobs I got to do around the house. Still none the wiser if there's a difference with the two models, they do look almost identicle except a few parts. I'm thinking of taking a break after I finish these last machines then maybe get stuck into the Villiers when I get bored.

BS