difference between cr and or

just got was told was cr but looks like its a or,frame mm06785 and enh is 2067 1733 what is difference between or crgot her back brought as non runner put fresh plug in and she runs a dream,what cause of action would you guys take planning full strip down so want engine to be right,thinking crank case seals ect any info would be appreciated as going to do engine myself as last cr 500 i did i had little help cheers.

OR models had silver rims , CR models had gold Nordisk rims. OR had big muffler CR had little muffler.

The OR parts list will show you the difference, as it's just a list of parts that are different from the CR.

Look here: http://www.yourhusky.com/files/79-390OR-husky-parts.pdf

Are you sure that the 1979 CR had 5 gears? I thought it also had a 6 speed box but with closer ratios.

My understanding is that the OR gearbox has the first three wide ratio gears from the WR engine and the top three gears are the close ratios from the CR gearbox. This allowed the enduro/desert racers to raise the gearing for higher top speed but still allow the bike to potter along in first at low speeds.

The 79 OR had 17" Curnutt shocks fitted. And I think the tank is slightly bigger at 3 gallons (must admit I am not sure of the size of the tank on the CR).

I think those are the main differences. Anyone think of any others?