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Hi; 

I recently purchased a 31000 Mike divvy 900. Have changed the oil to 10-40 shell advanced synthetic based and fitted a genuine filter. Somehow she seems noisier 

 

Am hoping someone could advise me if the oil I have used is suitable or not. The oil issue seems to be a minefield.

Some are saying it should be SE oil due to age etc. 
 

Wondering if I need to drain and start again.

 

 

 

Many thanks for your help in advance.

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As long as its motorcycle oil you should be ok. Car engine oils have different additives in them. I suppose if the bike has been run on mineral oil for years, there may be a chance of a slight difference in noise, possibly a bit of clutch slip too as the friction material will be contaminated with mineral oil

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Try Yamalube 10W40 Semi-Synthetic...
Fully Synthetic isn't a good choice for the older bikes.

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