6 replies to this topic

[jenkinsm]

NOt had a problem for 6 years with gassers and then my 08 pro decides to start shifting poorly. It shifts fine upwards, no gear is hard to engage but on the down shift it is rough and difficult to get into the gear. I have been told that when the return spring in the clutch side breaks the gear lever moves right to top and bottom, i am not experiencing this.

Any ideas?

Selector poles?

Kind regards,

Mike.

[HAM2]

Do a search on here fella.
There is an amount of adjustment on the pro for improving gear changes.

[AMCQ46]

As HAM2 says, there is an eccentric adjuster under the clutch which sets the null position of the shift lever by moving the double sided return spring fixing point. it is easy to do and there are good instructions on other posts in these forms.

[JSE]

AMCQ46, on Mar 10 2009, 01:13 PM, said:

As HAM2 says, there is an eccentric adjuster under the clutch which sets the null position of the shift lever by moving the double sided return spring fixing point. it is easy to do and there are good instructions on other posts in these forms.

I looked back through some archived answers off our website and this should help:

"My first guess is that the shift centering spring needs to be adjusted. The
centering mechanism is located underneath the clutch, so you'll need to take
off the clutch sidecover to get at it. You'll see a coiled spring with two spring
tangs that go on each side of a special bolt/bushing that has a 4mm Allen
capscrew and a 10mm hexhead eccentric bushing.

The process of centering it is a little tricky at first, so expect to make
several attempts to get it right. If someone who knows how to do it shows
you, it's a lot easier than describing it. Lay the bike on it's side to take
the sidecover off and you won't have to change the oil and the rear wheel
will be free. Loosen the 4mm capscrew up a little but not loose. Put the
shift lever down into first but do not release it (you may have to rotate
the rear wheel a little to get it to go into gear). SLOWLY allow the shift
lever to come back to center and just before it hits center you should hear
a light "click" (which you probably not hear, which is probably you have
shifting probelms). If you don't, adjust the eccentric bushing (10mm open-end wrench) a
very small amount either way and try it again (it only takes a very small
amount of turning). Repeat this if necessary till you get the click. Then
try the same process with shifting up into second gear, slowly allowing the
lever to return to center to make sure you get the click. If you hear the
click in first (downshift) and second (upshift) the shift shaft mechanism is
centered, tighten the capscrew down and your problem should disappear,
hopefully.

It will take a few attempts to get it right, like adjusting four-stroke
valves, but once you get the hang of it, it should be a lot easier. "

Jon

[laser1]

adjustment procedure for above is about 6 1/2 minutes in.



Thank Jim Snell - Trialspartsusa.com

[JSE]

laser1, on Mar 10 2009, 04:48 PM, said:

adjustment procedure for above is about 6 1/2 minutes in.



Thank Jim Snell - Trialspartsusa.com

I forgot that adjustment technique was on the web. Jim (along with Dale Malasek) has been involved in making all the GasGas video owner's service manuals through the years and saved riders probably hundreds of thousands of dollars. I'm constantly using that website as a tech resource to answer riders questions.

Jon

[jenkinsm]

Thank you very much all

I will try that this weekend :/

If not its an engine out job!

Great!