I have a Yamaha 125cc Riva does anyone know if its a 4-stroke or 2-stroke?

Question

and its year is 1994

Answer 1

(edited for corrections)*MOST* two strokes have expansion chambers (the very first part of the exhaust pipe) while four strokes do not have an expansion chamber...

this one has an expansion chamber

http://www.feehilymx.co.uk/shop/images/2...

this one does not

http://www.pro-carbonracing.co.uk/shopim...

Answer 2

well beings it is a 125 probably a 2 stroke.

Answer 3

The 125 cc Riva is DEFINITELY a 4 stroke.

Good luck, and Happy riding!

Answer 4

thats funny man.. you have a bike and you dont know what it is crank it up and if it goes nee nee nee nee its two stock if it sounds more like a car then its four veroom veroom

Answer 5

Four stroke.

Answer 6

1994 Riva specs below..



http://www.geocities.com/ferrisl/scooter...

owners manual & service manual as well...

Its a 4 stroke..  

Further to the other posts..  someone mentioned that all 2 stokes have expansion chambers..  this is not the case..