Hi

I'm looking for suggestions as to where I could buy a valve adjuster screw and locknut for a 1978 XS400?

I've tried my local Yamaha dealer but no joy there.

On a ride last weekend the engine started running roughly, once home I went to check it over and re-set the valve clearances and I found one of the adjusters had vanished!

I tried draining the oil and removing the sump plate, taking off the cam cover and poking around with one of those useful magnet on a telescopic rod thingys, but there was of sign of it. Thankfully no metal particles either.

Next I took off with the head and barrels and removed and up ended the engine, thankfully that did the job and the offending adjuster and locknut fell out.

Unfortunately the fine pitch thread on the screw is sufficiently damaged to render it unuseable.

I guess this is my own fault for not tightening the damn thing up suffciently, thankfully the only damage will be the cost of a new adjuster and some gaskets!

many thanks

Dave

Hi

I'm looking for suggestions as to where I could buy a valve adjuster screw and locknut for a 1978 XS400?

I've tried my local Yamaha dealer but no joy there.

On a ride last weekend the engine started running roughly, once home I went to check it over and re-set the valve clearances and I found one of the adjusters had vanished!

I tried draining the oil and removing the sump plate, taking off the cam cover and poking around with one of those useful magnet on a telescopic rod thingys, but there was of sign of it. Thankfully no metal particles either.

Next I took off with the head and barrels and removed and up ended the engine, thankfully that did the job and the offending adjuster and locknut fell out.

Unfortunately the fine pitch thread on the screw is sufficiently damaged to render it unuseable.

I guess this is my own fault for not tightening the damn thing up suffciently, thankfully the only damage will be the cost of a new adjuster and some gaskets!

many thanks

Dave

http://www.nwvcp.com/pages/parts/viewbybrand/2/Yamaha.aspx

http://www.cmsnl.com/yamaha-xs400sh-1981_model8826/partslist/

its still listed, must have a lazy yam dealer.

http://www.nwvcp.com/pages/parts/viewbybrand/2/Yamaha.aspx

http://www.cmsnl.com/yamaha-xs400sh-1981_model8826/partslist/

Thanks very much, really useful links

Dave

its still listed, must have a lazy yam dealer.

Thanks that's good to know. I guess they can't be bothered with a few bits for a 30 year old machine.

I'll try Fowlers in Bristol.

cheers

Dave

Thanks that's good to know. I guess they can't be bothered with a few bits for a 30 year old machine.

I'll try Fowlers in Bristol.

cheers

Dave

and also Motoward

part # 1l9-12159-01 screw

90179-06128 locknut

Thanks very much, really useful links

Dave

don't thank me! i got all my info from drewps...