Posted October 13, 200915 yr On my SR250 I need to replace (secondary) DRIVE CHAIN and SPROCKETS. The drive sprocket now has 15 teeth. The driven sprocket now has 40 teeth. The drive chain has 98 links now. When driving in 5th gear it shows 5000 revs at 70 km/hr Looking in the manual I found: Page 3-2: Drive sprocket (picture) 16 teeth. (On engine drive axle) Page 5-4: Driven sprocket (picture) 46 teeth. (On rear wheel) Page 7-8: Specs Secondary drive chain:: Type 520 DS :: 102 Links. My bike has plenty of pull and used 28 up to 33 km per litre when I drove over 1000 km with two up (73+53kg) and some luggage (~20? kg), from Eastern to Northern Thailand. Does anybody know factory recommended specs? Or can anybody share experience from use of any distribution(s)?
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