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[Shirty]

Hi,

I am experiencing a smokey exhaust on the over-run of one side of my Meteor 700 engine. The engine was re-bored & fitted with new pistons, valves & guides around 18 months ago & has been properly run in. It has been suggested that I fit valve stem seals, as it's possible that oil is being sucked down one the valve guides.
Has anyone tried this mod? if could you give me some pointers as to what is required.

Thanks - Shirty

[Dennis C]

Hi yes I had the same problem on my super meteor, they only need to be fitted to the inlet valve, you will have to remove the guide to machine it for the seal.

[meteur]

hi shirty i had the same problem with my super meteor it turned out to be niether of the breathers were working .the breather below the left cylinder was missing the back plate and the discs were bent and the disc in the alternator nut was also bent and jammed solid.i fitted a new back plate and three new paper discs all parts were fromour hosts.no more smoke apparantly they over oil and smoke if the breathers are faulty . Chris Best. .

[Shirty]

Thanks for the replies so far.
Meteur, I don't think that it is the breather as I have fitted my old Bullet unit instead of the original unit, complete with duckbill pipe.
Dennis, what seals did you use? did you re-use the same guides or did have to fit new ones?

Cheers - Shirty

[Alan R]

Hi guys-------- SHIRTY, as a general rule of thumb it's usually a good idea to have seals on the INLET side only as the inlet tract volume ( ie between the carb. slide and the inlet valve head) is subject to an extremely high vacuum each time the throttle is closed.. And placed directly into this is the inlet valve guide nose...Again, generally speaking the seal is usually a press-fit onto the upper body of the guide. However if you are modifying a design that doesn't have a seal as standard you might well have to adjust/machine to "make it so"... Conversely, I prefer NOT to have them on the exhaust valve as this is the HOTTEST point on the engine with no form of positive lubrication, so any oil getting in there is a bonus.... I would also recommend the use of Phos. Bronze guides as these tend to be more durable than cast iron...

[Dennis C]

Hi shirty I used seals
purchased on eBay just measured the stems and bought them to suit they fit over the guide after machining the top to fit.my guides and valves where almost new but the bike still smoked I was able to remove the guides and reuse them.

[Shirty]

Thanks for the info Alan & Dennis, that is very helpful, I'll get looking!

Cheers - Shirty

[Mark M]

Shirty, the seals are available from Hitchcocks, standard Bullet ones will work, from the Accessory Catalogue. Just do the inlets as has been suggested. They are a push fit, no machining required. Just back from Kempton Park Autojumble, was talking to Dean Hoare, he's just bought a Meteor lump to put in an Indian Bullet chassis, looks like they're breeding! REgards from yer ol' pal, Mark

[Alan R]

--------- Kempton Park !!!----- in this weather ??? What were the odds on that happening ?? SO, what price was the "inlet", you must have been "Exhausted" after a long day, did you "seal" up warm ?? Can this count as a NON-hijack please ??

[Mark M]

Kempton Park Autojumble was absolutely fine, sunny and dry, nearly warm a couple of times! The snow seemed to have moved north during the night so we didn't see any. When the gates opened it was a bit down on punters but by midday was very busy. A few regular stall holders were absent but otherwise a good turnout. There was a reasonable amount of RE stuff there. I picked up a few bits and pieces for the various projects, notably a new (repro) Home Market 4.5 gallon tank for the Series 2 Interceptor project which I had arranged to view and collect. And also pick up a seat donated by a pal so I'm very happy thanks! REgards, Mark