Tagged: Return spring
October 13, 2014 at 11:42 am #4175AnonymousInactive
Hi, I’m new to MZing having just bought a ETZ 301.
One of the jobs that need doing on this bike is the gear change return spring that has failed.
As I’ve never had one apart before, my question is:
Is replacing the spring easy? Can I simply remove one of the crankcase halves? Any special tools needed?
Failing that, is there any repairer/dealer in the South West of the UK that is competent at doing this job for me?
Thanks for your help
October 13, 2014 at 8:17 pm #4178Richard SmithParticipant
To get to the gearchange spring the engine has to come out for a complete strip.In theory,it is possible to remove the right hand crankcase half but,if the gear detente spring or arm [behind the primary gear,left side] move out of place [quite likely] then the clutch and primary gear will have to come off to get at it.Only one special tool is essential-a clutch removal tool.The best one is made and sold by Kevin Salt [KGS sales firstname.lastname@example.org] the cheaper ones on e bay are not up to removing a really tight clutch.He also makes a crankcase separator tool [not essential,but sometimes the crankcase halves can be a pig to separate].
A haynes manual is fairly essential if you are new to MZs,and a couple of hours study will be time well spent so you don’t finish the job [like me] with a shim or important washer left over. Good luck,Terry.
October 14, 2014 at 7:11 am #4179AnonymousInactive
Thanks Terry, that’s just the sort of advice I need. The previous owner rigged up a couple of external tension springs attached to the gearchange lever, which sort of works most of the time, but over the winter I’ll get to and strip the engine.
October 14, 2014 at 2:51 pm #4181Richard SmithParticipant
Just found something that could be very helpful.Dial up Youtube on your computer and type in MZ training films.There are about five of them,and they show how to strip and rebuild MZs.
The chap doing the work can strip and rebuild an MZ engine in a ten minute film!
Bloody incredible! Reards Terry.
October 17, 2014 at 11:13 am #4194Nigel TuckerParticipant
If you need a hand to change the return spring, or you want me to do it for you, I am in the west country and you can contact me on 01726 812376. I have rebuilt a few M.Z. engines and have the tools for the job.
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