I'm going to change the belt tensioner and want to change the belt as well.There appears to be more than one belt though.How does one tell which belt to get? Its a 2002 R50.

 

Check out Detroituned or Waymotorworks for options.

 

R50 non S only has one belt size. This is the correct one
https://www.waymotorworks.com/oem-co...rive-belt.html

and this is the tensioner
https://www.waymotorworks.com/oem-be...ioner-r50.html

 

Unfortunately I get an error in trying to load these pages.

 

Unfortunately I get an error in trying to load these pages.

 

Survey says you want PN 11287518250 for the belt

 

 

I was happily surprised how simple it was to replace the tensioner and serpentine belt on a R50 model. The key is to have the right tools - 10 mm long open end wrench, the Schawben tensioner, and L-shape tool. Took less than 20 mins.