You were absolutely right, please accept my most sincere appologies... I hear K&N and I don't really think on oil filters... And as you use oil on the air filter, thus my confusion, apologies...


30 years ago there were people saying that hiflofiltro were blocking and causing engine failures, never saw any one failing, changed a lot of them on several SR250, but got a lot of thoughts about it every time I was holding one of them on my hands...


I would be more worried by the fact that K&N does not like the standard housing, and you need a different tool to remove and fit it...


I have only changed oil filter once on the Fazer (lately), and I reckon that the price from Yamaha to any other is totally marginal once you do the change yourself...
£6 for an hiflofiltro, and £17 for a Yamaha, £14 for the K&N
Taking into account that the K&N price is similar to the Yamaha, why bothering? I would understand considering the cheaper one instead, and then start complaining about breakages...
Also I totally understand the "performance" for an air filter, as it is inline with how the machine works, but these days, and with the bike at this age, I am much worried that the oil pipe in front of the barrels does not fall apart by rust, much more than a freshly bought oil filter, no matter the brand...



I will doubt that any decent factory (any one with a name on the filter, specially those with a lot of years doing them) could make faulty filters these days... I will consider instead how people will fit the filter, it may happen that those "performance" filters have a slightly smaller rubber (just making thoughts on my mind), and if you don't put oil properly on all the surface they end up breaking the seal sooner than expected..., or that the fact that it requires a different tool, may make people not tighten it properly...


Again, please accept my appologies for the confusion...

Thanks, no previous owner, just me trusting blindly the mechanic, and specially last pandemic year mostly standing outside with almost no use... I have decided to take care of it myself from now on...


Learned the hard way, and now with new downpipes, rebuilt all coolant pipes, silicone hoses, new pressure clips, all new set of O-rings prepared to fit (even thermostat, that may be needing a new housing...), and specially a roof to give the bike some shelter, I am in the hope of at least a few years more without incidents...


On the barrel adaptor (solidified to the almost died metal pipe, that may be requiring some work soon), I used some limescale remover (but made mistake of submerging into soapy warm water, and lost finish), and was able to remove all of it, but I don't see how to do it on the barrels without risking barrel flat finish (if using sharp tool), or final cleanup (if using some product). I can always find a second hand adaptor, but I don't see me changing barrels...


Question was more about what to do with it, to fit the adapter directly with new O-rings properly greased, or try to do something about it, I reckon that it will always be better than it was even if left as it is right now...

Thanks a lot for the response,

I have just had a look at the Haynes manual, three cables come out of the alternator, they seem AC, so they should be fine no matter the order, I have not have a look at the connector on the bike, but it seems that there may be a 5 cables connector to the regulator, so in that connector the red and black ones should be taken care as they are 12V DC (+12V and ground), and those two are to be sorted correctly for sure.


Haynes just seems to put the three coming out of the regulator as white or grey on the schema, not even considering them important.