Tappet adjustment all used up?

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Taffy

Taffy

Joined
Nov 20, 2001
Messages
17,028
Location
Ely, England
has anyone else ever had this?

my tappet screws have always gone all the way through until only 3/4 of the nut thread is holding on on one and the others well, the top of the screw is level with the rocker arm.

there is the possiblity that over the years i have mixed an arm or two but what i can say is that i have the correct arm for the splay of the pairs of valves (the pads sit square on the valves).

regards

Taffy
 
So either or both the valves are getting shorter and the valve seats are getting thicker??

Steve
 
this is my old '02 400?

i guess i have the valves with the 1.25mm lobbed off the top. but it wasn't always so? i've had this problem for years.

maybe i should get new rocker arms or at least check them against the old ones....

regards

Taffy
 
mail the bike over to me, i'll have a look at it and will get back to you :bounce3:
 
Taff,

If I recall correctly... The tappet for different rockers has a different length. Isn't there a "camel foot" tappet, and the "other one"? I recall that the threads exposed after tightening the locknut (jamnut) was different depending on which rocker it was used on? In-other-words, aren't the two a different length? Isn't the difference only a few mm, enough to make a difference in your case?

Also, the actual rocker arm thickness doen't change over those years, right?

Regardless, a tappet is a wear surface. So, if you don't change them, they will eventually disappear. Can this be the case? Won't your valves tulip and fail before this occurs? Didn't you change your tappets when you changed your follower bearings?

-Parsko
 
i'll look into that parsko. the pads have been a little discussed subject here over the years because for some strange reason people don't xhange them. i am on my third set as a precaution.

never changed the actual arms. although i swapped one out. truth be told i put the engine together and had a measured compression of 18 to 1 so i ported the face side of the head for better flow and just got on with it. still in a trance that it could measure that high. i even m,easured it twice!

anyway, lent it out and the headgasket ent PDQ with maybe other damage. will have to learn to NOT try and help people another time when the bike isn't how you yourself would like it.

so in the near future i'm hoping to get my BV head ready. this will drop the compression anyway so i may have to just get a feel for the SV and S. port head and then swop as soon as possible. i just need to feel enough to get a back to back. sadly the only rider the bike has known in theis state was a customer.

i did have one ride on it but with the standard zorst it had a flat spot.

regards

Taffy
 
Advice I received years ago, before UHE, was to change the followers at about 200 hrs or so, or nominally at the same time as the roller followers. Its something I've done but I can't recall it ever being discussed here at UHE.

Steve
 
i've got a few arms here that i've collected over the years i'll try a bit of "spot the ddifference"!

regards

taffy
 

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