xtz 660 engine rattle
 

Hi All,I have just joined the forum hoping someone can give me some helpfull advice regarding my bike.I went out for a ride to Wales on my xtz 660 today and while on a dual carrigeway travelling at about 80 m.p.h the bike suddenly lost power and then picked up again,i pulled over and checked it but found nothing obvious,i carried on and noticed that the engine is making a rattling noise,not quite a tappet noise,more like something loose inside the head,power is fine and the noise does not get worse at higher speeds or under acceleration.I am beginning to think i am jinxed with xt's as this is exactly the same thing that happened to old xt600 about a year ago,i pulled the head down but found nothing and sold it as spares or repair.Has anyone had this happen to them and know what the cause is?The guy who bought my old xt has not looked at it yet but suggests that it could be the balance shaft bearing,is this a common failure?
thanks in advance Steve.

crankshaft nut
 

Hi Steve,

take your clutch side cover off, and check the big nut on the crankshaft. Sometimes they get loose and make a funny noice. And have a propper look if it is really thigt, you need to have a good look.

regards

Thomas

Hi Steve, how'd you get on with the rattle?
regards,
Richard

Hi Richard,I swapped the tenere for an xj600 diversion and an xt350,both in good condition with tax and m.o.t,also splashed out on an r1150gs from a dealer,gone from one sick bike to three healthy ones.:clap:
I asked the lad who did the swop to get back to me when he has sorted the noise,will post the result.

xtz wiring diagram
 

since you seem to have a yamaha xtz 660 I was wondering whether you could send me them wiring diagrams, as I have a scrapped bike engine that I am re doing, but do not have the wiring diagrams.

please send them to jez_9540@hotmail.co.uk

Any help much appreciated.
Many thanks, Jez