valve guides

[gus]

i have a rotary oil pump and since fitting it i have noticed that the inlets are wet with oil,is there valve guides that you can fit rubber seals to like the jap bikes,i am using castrol gtx at the moment,would it be better if i used straight 50,when warm on tick over she is blowing a lot of smoke ,mainly on the right,and also tends to foul the plugs at about 40 to 60 miles causing misfires,gus

[L.A.B.]

is there valve guides that you can fit rubber seals to

It would help to know what type of motorcycle you have?
I am guessing you are referring to a Triumph twin (possibly Bonneville) fitted with a Morgo pump?
The modern Castrol GTX oil available in the UK (are you in the UK?) is now 10W-40 or 15W-40 grade,
 http://www.castrol.com/castrol/sectiongenericarticle.do?categoryId=82915272&contentId=6008622 which I would suggest is too thin an oil to use in a British bike, if that is what you are using then I would suggest you try a 20W-50 oil?
Valve guide sets with rubber seals should be available from Norman Hyde:
http://www.normanhyde.co.uk/- part number BVT04.  

[gus]

sorry,yes a 75 bonnie,where how do you get straight 50 oil ,apart from harley trade oil,which by name only puts cost on,and the last time i used it,it left a bubble gum ,sticky deposit  every ware,that messed up clutch and every else in the engine,i would like a normal oil, in the screw fix trade cat they do sell a 50 oil,i always change mine at 1000 miles,but i have been off the road for the last 5 years and have lost touch with all my usual dealers,gus,any suppliers of straight 50:?

[L.A.B.]

The oil that Triumph recommended  for your Bonneville is 20W-50 multigrade and I would be inclined to stick with it but if you do intend to use Monograde oil then it is available (if you are in the UK, I did ask?) from Castrol, Morris, Silkolene etc.  Any decent motorcycle shop should be able to order it for you or it is available mail order from Holdens:
http://www.motocycle.co.uk/productlisting.asp?code=0160&pageno=1&keyword=
http://www.motocycle.co.uk/productlisting.asp?code=0159&pageno=1&keyword=
http://www.motocycle.co.uk/productlisting.asp?code=0159&pageno=2&keyword=  

http://www.fuchslubricants.com/silkolene/classic.htm

[old_Norton]

Another thing to consider - oil pressure - I have a 70 Bonnie and, on a recent rebuild, contemplated a rotary pump but decided against due to increased pressure mentioned in the specs. Now that I have installed an inline oil filter this is when the rotary pump might be better employed. The extra pressure you now have may be pushing passed the valve guides!