I would like to raise the gearing on my 82 XV-920 but I don't know if a larger sprocket will fit in the cases or a smaller one in the rear enclosure.  Has anyone done this?  Has anyone eliminated the enclosure and used 530 chain?  Did this allow for a larger front sprocket or only a smaller rear?  Where did you get the sprockets to fit front and rear?  What is the standard US gearing?  Is the TR1 geared higher for autobahn use?  Can I get the European sprockets from someone over there?  Any help appreciated.  Thanks.  Hope you like the picture of my bike in the Gallery section.   Peter  

Roy, Thanks for the info. I learned from a US website that standard US gearing is apparently 16/35 too. My source indicated that perhaps a slightly smaller rear would fit.  I'm not ready for welded sprockets, but perhaps a 33 or 32 rear would be OK.  Any sources would be helpful.  PY  
   

I have removed the chain enclosure on my XV 920 as I have installed Yamaha XS 650 wire wheels on my bike (damn enclosure leaked anyway). My bike was recently pictured in the gallery and you can see it's naked chain. When I was a motorcycle mechanic many years ago, I would take notice of what parts were interchangeble on motorcycles. Many Yamaha parts are interchangable (i.e.: XV 920R and XS 650 rear sprocket bolt patterns are identicle, but the XS 650 chain is a 530). I was also a Kawasaki mechanic, and many Kawasaki parts are interchangable with Yamaha parts (sprockets, suspension, valve shims, and wheels). So I would suggest, taking your rear sprocket off and see if it matches the bolt pattern of a Z1, KZ 900, or KZ 1000 sprocket. I would not be surprised if it did match. There were many different diameters of those sprockets made as that bike was raced for many years in many different kinds of races. Good luck.

Correction:  XV/TR1 transmission output shaft spline is 26/30 mm, 6 grooves, six lands approximately 4mm wide

Salut
habe ich Virago XV1000 Rahmen n°42J - * * * * tief in meiner Garage.  Der Motor wird gebrochen, und ich suche einen Motor oder einen niedrigen vernünftigen Preismotor mit den Papieren.  Entschuldigen Sie es für das Deutsche, es ist google, das trraduit vom Französischen am Deutschen.
Danke im voraus
Salut,
J'ai une Virago XV1000 chassis n°42J-**** au fond de mon garage. Le moteur est cassé et je cherche un moteur ou un bas moteur à prix raisonnable, avec les papiers.
Excuse-moi pour l'allemand, c'est google qui trraduit du français à l'allemand.
Merci d'avance