Hi all,
I have stripped the engine on my Z1000, and stripped the head, the valve have all been cleaned up, and checked, the ex seem pretty good as in smooth etc, the inlets have very small step? I am wondering if lapping is enough to re-flat the valve seats or should I get them reground..here"s a couple pics,
Hello Guest User,
Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.
To access these 'Registered Users Only' areas simply register and login.
Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.
To access these 'Registered Users Only' areas simply register and login.
VALVES..Lap or Regrind
Moderators: paul doran, Taffus, KeithZ1R, chrisu
Andy if you can find someone to do it, get the 'throat' and 'relief' angles cut on the valves only.
15 and 60 degrees until the seat contact area is within spec (0.8 to 1.2 mm wide from memory for J models)
Colour the seat contact area with a permanent marker pen and lap them the least amount you can get away with.
AL
15 and 60 degrees until the seat contact area is within spec (0.8 to 1.2 mm wide from memory for J models)
Colour the seat contact area with a permanent marker pen and lap them the least amount you can get away with.
AL
1981 J1
valves
I have a valve refacing machine if your valves need a reface, I also have the 3 angles of valve seat cutters if your cylinder head needs the seats re-cut, but before doing anything I would check the valve guides for any play and also I'd check the valve stem diameters for any possible wear, there's no point in wasting time on valves and seats if the guides and stems are worn. Buzzard.
Every man should have a shed (for bikes obviously..)
Re: valves
buzzard wrote:I have a valve refacing machine if your valves need a reface, I also have the 3 angles of valve seat cutters if your cylinder head needs the seats re-cut, but before doing anything I would check the valve guides for any play and also I'd check the valve stem diameters for any possible wear, there's no point in wasting time on valves and seats if the guides and stems are worn. Buzzard.
Hi Buzzard,
have sent PM
I WOULD BE VERY CAREFUL RESURFACING VALVES AND SEATS.
If too much is taken off, the valve recedes into the head too much.
Valve clearances will be too tight and shims of the SMALLER thickness needed are not available.
Valve STEMS then need to be cut back to increase the clearance to the spec that the shims are used for.
BEWARE!!!!
If too much is taken off, the valve recedes into the head too much.
Valve clearances will be too tight and shims of the SMALLER thickness needed are not available.
Valve STEMS then need to be cut back to increase the clearance to the spec that the shims are used for.
BEWARE!!!!
Jimmock.
SPEED IS JUST A QUESTION OF MONEY...HOW FAST DO 'YOU' WANT TO GO?
I hate people I don't like !
SPEED IS JUST A QUESTION OF MONEY...HOW FAST DO 'YOU' WANT TO GO?
I hate people I don't like !
Who is online
Users browsing this forum: No registered users and 228 guests