Starter Motor Problem

[welsh mz biker]

Hi there fellow Mz riders, hope you all are well ?? my son went to start his RT 125 2003 this morning but the starter just spins over, wont engage engine, had no previous problems or hints to why this has suddenly come up.......ive checked all wiring seems to be ok, could it be solenoid ?? or is the starter gone poof ?? we have taken the starter off cleaned n checked brushes, nothing seems worn the cogs seem ok too no wear or tear, im lost for ideas hope its not starter they are gonna be expensive i bet, any ideas guys n girls ??

[cam]

I'm not familiar with the RT 125 myself but the problem would be explained by the starter cluch (if fitted) not engaging. When you had the starter out did the gear spin freely in both directions?

[DAVID THOMPSON]

A HOW TO FIX PDF IS BEING MADE AND WILL BE SENT SOME TIME NEXT WEEK
TO welsh mz biker I AM IN DIRECT EMAIL CONTACT WITH HIM
DAVE


THE BIG TYPE IS FROM DOING THIS IN MY HAM RADIO RTTY PROGRAM
AND I AM TO LAZY TO RETYPE IT THE LITTLE STUFF IS CUT AND PASTE

[djsbriscoe]

Dave,
Can you send me a copy as well as I might have to do this repair myself in the future.
My email is davidATdjsbriscoeDOTvispaDOTcom.
Thanks.

David.

[DAVID THOMPSON]

will send
but i am having some problems here that require my attention
and may be a couple days getting it together
dave

[welsh mz biker]

Sorry for the late reply guys had computer problems, firstly id like to thank dave for his help in identifying our starter problem, sa usual he was spot on with his diagnosis. We ended up putting the bike into local shop to be fixed and yeh it was as dave said here the starter clutch ,im glad we put it into be done because they had alot of difficulty with engine casing allen key bolts breaking, had to replace 6 altogether starter clutch was same as a yamaha 125 but was still £90.00 gulp!! the job cost £220.00 thats about $440 i think! but in that price was starter clutch, engine oil, filter, front tyre , wheel bearings & front brake light switch of which the bike needed to pass the MOT plus labour & collection of the bike at the start, so i dont think that price was to bad, anyways thought id let you guys know and thanks for your time and help once again, cheers!!

[reevesy87]

hi ppl,i have an mz rt125 2004 and need a free wheel/starter clutch and cant find one anywhere,i read that a yamaha 125 one will fit but off of what model any idea's help!!!!!

[DAVID THOMPSON]

link to parts guy in ca usa
viewtopic.php?f=18&t=4260

in europe
http://www.grahamsmotorcycles.com
dave

[egremy-arroniz]

Hi amigos, I just had the same problem with the free wheel starter clutch of my 1994 Saxon tour 500 . Since MUZ motorcycle are unknown in Mexico, (I got mine from the US) there are no parts dealers, import from US or Europe is kind of a trouble. I serched the web and found GUNTER SIX who sent me the whole repair manual (which I appreciatte very much)
I have some mechanical experience so I took the part off and found that it was allready fixed. seams like a previos repairmen, made an insert and welded to the center of the gear. But the problem was that the gear has a rockwell hardness of 55 and the insert was only 33, since the rollers of the clutch get in contact with this inserted part, the softer material was ground finally loosing the grip capability.
I bougth some Machinery Steel, turned the part in a lathe, visit the gear hobbers shop, a good and even heat treatment and finally a fine ground. I replaced the needle bearing and put all back togheter, and it worked as it should.
Now I have to inspect the oil filter and the cranckase screen, to clean the metal grounds that should be in there.
It seams to me that the clutch system is a little undersize and the problem is going to come back. I hope not but I´ll be prepared.
By the way, the total cost of the part was $ 59.00 dls. Saludos.

[Bertie]

hi ppl,i have an mz rt125 2004 and need a free wheel/starter clutch and cant find one anywhere,i read that a yamaha 125 one will fit but off of what model any idea's help!!!!!

where abouts do you live? i have an RT125 that im breaking for spares, still have the starter motor

[MZ newbie]

hi guys any chance i can get a copy of PDF on how to fix the starter clutch problem please? iv been bump starting the thing to get me to and from work, im in danger of becoming fit.

thank you

[djsbriscoe]

me too please.
Thanks.

[DAVID THOMPSON]

HERE IS A PDF FILE I FINALLY GOT DONE FOR THE FIX
I AM NOT VERY GOOD A WRITING
BUT HOPE THIS HELPS
DAVE

[MZ newbie]

http://www.mediafire.com/?w40mt5f96me77cc

.rar file contains vids and pics of starter clutch being replaced by me. I'm not a mechanic, in the vids i start the bike with the engine cover off just to show the problem, this is not advised.