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Are MZ's all that bad???

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smegballs
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PostPosted: 19:03 - 29 Dec 2007    Post subject: Are MZ's all that bad??? Reply with quote

Hi guys, I have a strange longing for a MZ TS250. I know that they must be one of the most goddamn ugly bikes ever created but since i dont have one i would like to know what the go like. Are they really indestructible commie-machines or are they as bad as my dad says ( slow, horrible noise,break down etc....)?

Anything appreciated

Rich
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G
The Voice of Reason



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PostPosted: 19:08 - 29 Dec 2007    Post subject: Re: Are MZ's all that bad??? Reply with quote

They are slow, they do use basic technology and they do seem to have bits fall off a bit more regularly than other bikes.
But then this should be reflected in the price; a jap bike for a similar price is unlikely to be too amazing either.

Power would be low for a 2 stroke 125 from the last twenty years, but probably up there with 4 stroke 125s and the less sporty 250s.
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iCraig
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PostPosted: 19:17 - 29 Dec 2007    Post subject: Reply with quote

They're just your standard iron curtain 2 strokes, infinetly rebuildable and good fun.

They handle amazingly well even on mullered shocks too. And they have about 23bhp, so will do about 90mph.

Electrics are a weak point on them, especially only being 6 volts, so the lights are piss poor on them! Oh and make sure it has electronic ignition, if it doesn't barter hard or walk away!

Expect to pay £10 to £500 depending on condition!
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G
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PostPosted: 19:23 - 29 Dec 2007    Post subject: Reply with quote

Craig- wrote:

They handle amazingly well even on mullered shocks too. And they have about 23bhp, so will do about 90mph.

Not sure what you're comparing the handling too, but as standard I got the impression it was pretty bad.
Also, from what I knew the quite-tuned ones make 25hp, so 23hp seems a tad optimistic.
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iCraig
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PostPosted: 21:45 - 29 Dec 2007    Post subject: Reply with quote

G, they're light and very flickable. I owned an ETZ251 and that handles amazingly, and I have ridden countless TS250's and Supa 5's and there just as good.

And whoops meant to say 20bhp is what they're quoted as having.

FYI I was a member of the MZ Riders Club for a few years. Wink
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phil2alp
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PostPosted: 21:54 - 29 Dec 2007    Post subject: Reply with quote

When I was on a tour in Austria a few years ago I met a couple in Innsbruck who were riding around Europe on an MZ. She rode pillion with a cantilever toolbox on her lap because it broke down fairly regularly. They said they didn't mind though as it was so easy to fix.

Laughing
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iCraig
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PostPosted: 22:04 - 29 Dec 2007    Post subject: Reply with quote

phil2alp wrote:
When I was on a tour in Austria a few years ago I met a couple in Innsbruck who were riding around Europe on an MZ. She rode pillion with a cantilever toolbox on her lap because it broke down fairly regularly. They said they didn't mind though as it was so easy to fix.

Laughing


Aye, my ETZ251 had a habit letting go of wires making it near impossible to start till I found out what it was. Little thing only ever cost me £2.50 for a spark plug and £15 for the MOT mind.

Which is a hell of alot less than some of the Jap stuff I have owned.
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G
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PostPosted: 23:57 - 29 Dec 2007    Post subject: Reply with quote

Craig- wrote:
G, they're light and very flickable.

Light and flickable is only one part of good handling to my mind.
The ones I've seen/talked to people about etc haven't been amazing and haven't been helped by standard wheel size limiting tyre choice.
I'm comparing this to something like, say an NS125 or similar which have maybe a bit more power and can be got for a bit more.

You might, for all I know, be a member of the Skoda club now; it doesn't mean that I believe you if you say Skodas are great Wink.
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iCraig
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PostPosted: 00:03 - 30 Dec 2007    Post subject: Reply with quote

G wrote:

You might, for all I know, be a member of the Skoda club now; it doesn't mean that I believe you if you say Skodas are great Wink.


Skoda's are ok. Razz

I picked up alot of experience with MZ's. If they handled like shit then they wouldn't race them would they? Razz
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G
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PostPosted: 00:09 - 30 Dec 2007    Post subject: Reply with quote

Craig- wrote:

I picked up alot of experience with MZ's. If they handled like shit then they wouldn't race them would they? Razz

They wouldn't race them as stock, oh, they don't Razz.
Ok, probably you do get a few stock-ish bikes out there, but any one anywhere near the front has quite played with suspension from what I've seen.

So yes, they can be made to handle well, but so can most bikes that don't have too stupid geometry.
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gerkin
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PostPosted: 18:24 - 02 Jan 2008    Post subject: Reply with quote

drum brakes on a mz are death traps ,,go for a etz250 front end swap with disc brake,,,yep electrics are weak point the red charging light comes on until you find the corroded connection ,,great work horses cheap to run and rebuild crank seals a weak point

cheap spares here !

https://www.mz-b.de/mz/emz.htm
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flyer
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PostPosted: 18:32 - 02 Jan 2008    Post subject: Reply with quote

My Bro has a MZ sm125, and its a little gem of a bike, with a after market exhaust, it goes well, and sits at 80 mph on a good stretch. I was well impressed when I tried it
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stinkwheel
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PostPosted: 21:04 - 02 Jan 2008    Post subject: Reply with quote

They're great. Frankly, who wouldn't want a bike with an exhaust that long?

It's all well and good comparing them to an NS125. Then you encounter a headwind or a hill and you suddenly realise why attaching a sidecar to an MZ, piling it full of stuff and plonking a passenger on the pillion seat has little discernable effect on its top speed.

MZs have torque coming out of their ears (comparatively).
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smegballs
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PostPosted: 00:17 - 03 Jan 2008    Post subject: Reply with quote

on the control panel whats with the green line. Its sort of like a redline but is in the midrange??

Rich
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smegballs
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PostPosted: 00:22 - 03 Jan 2008    Post subject: Reply with quote

on the control panel whats with the green line. Its sort of like a redline

Last edited by smegballs on 17:47 - 17 May 2021; edited 1 time in total
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smegballs
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PostPosted: 15:01 - 03 Jan 2008    Post subject: Reply with quote

sorry for the double post, not quite sure why that happended.

Last edited by smegballs on 07:06 - 17 May 2021; edited 1 time in total
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gerkin
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PostPosted: 21:28 - 06 Jan 2008    Post subject: Reply with quote

thats the usable powerband!
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Noxious89123
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PostPosted: 22:55 - 06 Jan 2008    Post subject: Reply with quote

The ones with the green powerbands are the rarest Surprised

Thumbs Up Laughing
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Zen Dog
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PostPosted: 14:21 - 07 Jan 2008    Post subject: Reply with quote

Dont do it! I thought the MZ was great until i actually had to mess with the engine internals, which were clearly designed by a sadist who'd only heard of motorcycles third hand...

If you want a simple rubbish bike, get a CB250 superdream or something, all the lack of performance, without the tears of frustration and the frankly weird riding position.

Zen Dog
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Current - '94 VFR750FR (Dead), '00 VFR800FI, 2011 CBF125 Previous - '10 Street Triple R, '92 MZ ETZ301, '05 TTR250, NSR125R, KMX125, "Honda" Win (chinese copy of an old Honda design with a C90 engine)
My bike trip around S.E. Asia 2010/2011
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stinkwheel
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PostPosted: 15:13 - 07 Jan 2008    Post subject: Reply with quote

Zen Dog wrote:
Dont do it! I thought the MZ was great until i actually had to mess with the engine internals, which were clearly designed by a sadist who'd only heard of motorcycles third hand...


No, it's the Japanese who have it backwards. MZ made them first. In point of fact, the MZ chief designer also designed the first sucessful Japanese 2-strokes after defecting durng a race

The engine internals are fantistic, the design is very good and robust. Keyed shafts and big, meaty ball/roller bearings all over the place.

Was it removing the MASSIVE crank-mounted clutch basket that caught you out? They're a bit of a bugger to shift eh? You just need a good enough puller. The extra weight acts as a flywheel and is one of the reasons for them being so torquey.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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Zen Dog
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PostPosted: 16:08 - 07 Jan 2008    Post subject: Reply with quote

Double Post.
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Current - '94 VFR750FR (Dead), '00 VFR800FI, 2011 CBF125 Previous - '10 Street Triple R, '92 MZ ETZ301, '05 TTR250, NSR125R, KMX125, "Honda" Win (chinese copy of an old Honda design with a C90 engine)
My bike trip around S.E. Asia 2010/2011


Last edited by Zen Dog on 16:14 - 07 Jan 2008; edited 1 time in total
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Zen Dog
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PostPosted: 16:09 - 07 Jan 2008    Post subject: Reply with quote

stinkwheel wrote:
No, it's the Japanese who have it backwards. MZ made them first. In point of fact, the MZ chief designer also designed the first sucessful Japanese 2-strokes after defecting durng a race

The engine internals are fantistic, the design is very good and robust. Keyed shafts and big, meaty ball/roller bearings all over the place.

Was it removing the MASSIVE crank-mounted clutch basket that caught you out? They're a bit of a bugger to shift eh? You just need a good enough puller. The extra weight acts as a flywheel and is one of the reasons for them being so torquey.


Yeah, i know they came up with them first (expansion chamber etc.), but you'd think they'd have made some improvements since 1960-odd...

The crank mounted clutch basket is the least of it, at least i'd been warned about that. The transfer ports system is so inefficient, they clearly thought that wheezily blowing the gases vaguely in the right direction would be good enough, the gear change mechanism is abysmal and only works with a vicious stamp, the crankcase halves refused to come apart without hammering (despite the claims of the haynes manual), i cant find neutral (or the neutral light) now for love nor money with the engine running (even though i didnt touch that), and the clutch adjustment in the engine is a knife edge between failing to grip when you kick it over or killing the engine when you slip it into first even with the clutch fully in...

There is way too much wasted space in the engine too, it just seems like they drew a shape in 1960 that they could fit everything into and never bothered to change it.

I do like the torqueyness of the engine, but i'm already planning to use the bike as a test mule for a fully electric motor/battery setup because i hate the engine so much. The chassis though, to be fair, is lovely.

Zen Dog
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Current - '94 VFR750FR (Dead), '00 VFR800FI, 2011 CBF125 Previous - '10 Street Triple R, '92 MZ ETZ301, '05 TTR250, NSR125R, KMX125, "Honda" Win (chinese copy of an old Honda design with a C90 engine)
My bike trip around S.E. Asia 2010/2011
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stinkwheel
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PostPosted: 17:43 - 07 Jan 2008    Post subject: Reply with quote

Ahh. You're falling into the classic trap of expecting too much from a really cheap motorbike.

You are entirely correct, the engine has changed very little from the late 1960's, the gearbox is totally normal for that era.

Oh, and your clutch plates are warped, that's why you can't set it properly and can't find neutral.

I think the port timing is pretty efficient, and that's ultimately what they are about. They were primarily designed to get East German factory workers from home to their place of work in as cheap and fuel efficient a manner as possible. It is comparatively easy to mess with the port timing, the majority of tuning is carried out using a hand file.

The crankcase halves were never designed to pull apart easily. That's just Mr Haynes making stuff up again. In the absence of a factory puller (never seen one) you have to put them in the oven until they are burning hot, then they'll fall apart.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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iCraig
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PostPosted: 18:36 - 07 Jan 2008    Post subject: Reply with quote

Zen Dog wrote:

Yeah, i know they came up with them first (expansion chamber etc.), but you'd think they'd have made some improvements since 1960-odd...

There is way too much wasted space in the engine too, it just seems like they drew a shape in 1960 that they could fit everything into and never bothered to change it.


Thats the thing with Eastern Bloc engineering, if it worked then they had no need to change it, plus they didn't have the money in the latter years to invest in R&D, so most of the money they had (very little) went on styling to keep them vaguely up to date in looks.

Also it didn't help MZ's fortunes when Ernst Degner defected from MZ to Suzuki taking blue prints with him! But don't get me started on that!

And your year of ETZ301 is only just an MuZ, built after privatisation, so they still had a lack of money till the mid 90s!!

Cheers

Craig
(BCF's Resident MZ Enthusiast)
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Zen Dog
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PostPosted: 22:34 - 07 Jan 2008    Post subject: Reply with quote

stinkwheel wrote:
Ahh. You're falling into the classic trap of expecting too much from a really cheap motorbike.

You are entirely correct, the engine has changed very little from the late 1960's, the gearbox is totally normal for that era.

Oh, and your clutch plates are warped, that's why you can't set it properly and can't find neutral.

I think the port timing is pretty efficient, and that's ultimately what they are about. They were primarily designed to get East German factory workers from home to their place of work in as cheap and fuel efficient a manner as possible. It is comparatively easy to mess with the port timing, the majority of tuning is carried out using a hand file.

The crankcase halves were never designed to pull apart easily. That's just Mr Haynes making stuff up again. In the absence of a factory puller (never seen one) you have to put them in the oven until they are burning hot, then they'll fall apart.

Worth knowing about the clutch plates, though i'm not taking that bastard apart again, it can sit in my garage looking shiny till i electrify it.

And they really arent great on fuel, although it will run on gravy more or less. Twice the fuel economy on a superdream or CG. Whats the fuel economy like on a H100? At least its 2t.

Mr Haynes lies, a lot. Though i was gratified to note that the photos of the wiring in the Haynes manual looks just like mine (i.e. done by a 12 year old with ADHD).
Craig- wrote:
And your year of ETZ301 is only just an MuZ, built after privatisation, so they still had a lack of money till the mid 90s!!

A fact of which i'm all too aware. The new 125's are lovely little bikes, and excellent quality.

Zen Dog
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Current - '94 VFR750FR (Dead), '00 VFR800FI, 2011 CBF125 Previous - '10 Street Triple R, '92 MZ ETZ301, '05 TTR250, NSR125R, KMX125, "Honda" Win (chinese copy of an old Honda design with a C90 engine)
My bike trip around S.E. Asia 2010/2011
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