"Jens Jacob Bager Jensen" <bager@nospam.dkfritidmotorcykel.dk> skrev i en
meddelelse news:2hctb.11156$5k7.7590@news.get2net.dk...
> > Jeg har påtaget mig at hjælpe med at stille ventiler på en CB 500 fra
> > 94' for en sød studine veninde jeg har. Der sidder en
> > knastkædetrammer jeg endnu ikke har set.
>
> Her er hvad jeg selv fandt på en engelsk side, og der er sådan satr hvad
jeg
> selv gjorde. Fordømt! Nå, men jeg må undersøge om de nye tændrør er gappet
> rigtigt og om den er taktet rigtigt, så af med toppen igen.
>
> How do I know the cam chain tensioner needs changing?
>
> The engine can make many rattles but if you hear some metal knocking in
the
> topish part of the engine and it comes from both sides of the engine
> equally, louder when the engine is cold and the noise gets progressively
> worse with time, then it may well be the cam chain. Mine started to
rattle
> at 30k miles.
>
> How do I change the tensioner?
>
> It is easy to change the tensioner all you need is a small screwdriver
> (80p), 8mm open end and ring spanner (£1.25), a new tensioner (£50), and a
> new gasket (£5). It is a bit fiddly but not complicated.
>
> The new tensioner comes with a small key to stop the plunger extending.
> When you remove this key the plunger extends. You cannot push the plunger
> in, instead you have to insert a small screwdriver into the hole where the
> key fitted and turn it anticlockwise and wind the plunger in. Reinsert
the
> key and lock the plunger. Try this before you start the work it will give
> you some idea of what is happening inside the engine. Remove the key from
> the new tensioner. This will help you remove the old tensioner.
>
> 1. Remove the bolt from the centre of the tensioner, do not let the
bolt
> or the washer drop or else you will have a merry ½ hour trying to recover
> it. This bolt only keeps the dirt out.
>
> 2. Insert the key from the new tensioner into the bolt hole turning it
> anticlockwise until you can lock it as you did when you played with the
new
> tensioner.
>
> 3. Undo the two 8mm bolts on either side of the tensioner. Don't drop
the
> bolts!
>
> 4. Remove the tensioner and remove the key. The plunger should spring
> out.
>
> 5. Use a screwdriver to retract the plunger on the new tensioner and
lock
> it with the key.
>
> 6. Insert the new tensioner and replace the two bolts firmly and both
> equally (don't over tighten one side leaving the other loose).
>
> 7. Remove the key and you should hear the tensioner spring out.
Replace
> the centre bolt and washer (I found this a bit tricky).
>
> 8. Go down to the pub and buy yourself a pint!
>
>
Hej Jens
En ældre CB plejer at "banke" en del i tomgang, min CB400F, CB750F og
CB1100F gjorde det men der er selvfølgelig en grænse. Lyden forsvinder gerne
fra ca. 1500 omdrejninger og op, jeg har nu aldrig kastet mig over en ny
knastkæde af den grund.
PS. Når du når til punkt 8 så husk at tage hende med
Med venlig hilsen Kim