Hi all I’ve tried to kick start my gas gas txt 250 this morning and heard a crack from inside the casing the the kick start stayed down and didn’t spring back up the now the spindle connected to the kick start spins freely any advice would be appreciated thanks.

No matter what, you need to pull the cover off and take a look.

Return Spring snapped or popped out of it mount, 

The crack you heard was most likely the kickstart engagment gear crapping itself.

A regular occurance with gassers.

Every one of mine has either eaten its ks gear or the shaft or both.

Yup, it's time to open it up. Do be aware that for an initial inspection you can keep the coolant system intact (i.e., you can remove the water pump and clutch cover as a unit without first draining the coolant), and if you lay your bike on it's left side you can remove the clutch cover without first draining the oil. Jim Snell has a video on servicing the PRO clutch and it discusses these simplifications (as well as talks about a shim on the kick-starter shaft). It's all good stuff.

Edited April 27, 20206 yr by d2w

Also take a look at the cover in the area around the kickstart to make sure the cover did not also crack during the "event".

Spoiler

 

 

I’ve taken the cover off and found that the gear has snapped 

 You still have to remove the clutch to see the idler gear too.

Clutch comes off complete,one cap head Allen bolt in the centre holds it on shaft

not very confident but I’ll have a go at it tomorrow ?

Hopefully this will add to your confidence. Full credit to Jim Snell. https://www.youtube.com/watch?v=gnLY1IrMvBM

Someone before me has had a go of removing the clutch and has rounded the head of the Allen key bolt ?

It is supposed to be a hallow bolt. So easy enough to drill the head off and remove the clutch. Then the bolt should come out fairly easily.

Also remember not to turn the waterpump and crank. Also do assamble the cover when the bike is flat on its side.