Sherco 4t Timing Chain Tensioner

[higgypop]

has anyone had any problems with the timing chain tensioner chain sometimes slaps when rev and tickover, I have checked the timing chain tensioner it seems to operate fine !

[essex rider]

I noticed this today, only when the bike was cold and on very low tickover. Dont know if it means anything but it stops once the engines warm or if i fiddle with tickover speed.

[sirhc]

I think what you are hearing is the automatic compression release. I've heard it on other 4t's (non trials). At very low idle or tick over the cam isn't going fast enough to full disengage it. I think my 3.2 did it too, but I really can't remember.

Edited September 14, 2008 by sirhc

[higgypop]

thankyou for your feed back

[higgypop]

hi I retensioned the timing chain spring then reasembled the parts to the chain tensioner which gave it a stronger tension on the chain slides thus quietening any chain noise runs great now superb, infact I have had 2 montesa 4rts and it grips better than them and is easier to do trick riding because it feels alot lighter I would recommend these bikes I have owned all the other marquees except beta and it is superb

[shercorider]

I replaced the timingchaintensioner on my 3,2 4T the other day and it fixed the problem. It now runs without any noise from the chain.

Now there

[higgypop]

try a slightly thicker oil you will be suprised with the difference mine is very quiet now hope this helps

[shercorider]

try a slightly thicker oil you will be suprised with the difference mine is very quiet now hope this helps

Any suggestions on what oil to use in a 3,2 4T?

[higgypop]

I use Mobile 1, racing 4T fully synthetic 10w-40 4 cycle motorcycle oil.

hope this helps also have you replaced the valve shims yet mark

Edited October 8, 2008 by higgypop

[kingfisher]

Higgy

How did you retensioned the timing chain spring, or did you replace it with a new spring

[higgypop]

hi in response to how I got more tension on the timing chain tensioner

1, I first took it of then I remove the circlip that holds it together at this point the tensioner arm will pop out.

2, there is a bolt on the other end of the tensioner you need to take it off, you will now able to put tension on the spring with a small spade screw driver,

while you have still got tension reasemble the tensioner arm by screwing back on,

holding the parts together with the tension arm full retracted put the circlip back on.

3, If you have done the above correctly it will have more tension power than before you disasembled it I hope this helps, it made my engine alot quieter I hope this helps let me know how you go on

[kingfisher]

i tock the tensioner apart this morning and found that the spring was broken, i will take it back to the dealer and see what he says

thanks for your help