Main Motorcycle: '01 Triumph Bonneville
Join Date: Sep 2012
|Air Cooled Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, Bobber, T100, Speedmaster, America, Thruxton, and Scrambler.
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(Somebody shoot me now, but I'll bite anyway as it's at least a week since this topic was last flogged to death.)
Well that will be FULLY (OR SEMI) synthetic then, as per the Triumph owner's manual if you care to read it. The recommended oil specs are clearly stated there. Just choose an oil from a reputable brand that meets those specs, particularly JASO MA, which covers use with wet clutches in motorcycle engines. A lot of people swear by a particular brand and type of oil, but unless they've run a load of identical motors on a bench for 100,000 miles or more using different brands of oil and measured any wear, it's all hearsay. The clutch slippage issue is caused by people using oil containing friction modifiers intended for use in vehicles with dry clutches (i.e. cars, etc...). It's nothing to do with the oil being fully synthetic. The OEM filters are not that expensive and are made by a reputable Japanese company in a USA factory, so I don't see much point in trying to save a few cents by using a filter that some say is great, but others say is rubbish.
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