EZT 250 - Hows yours running....

ETZ(including Kanuni), ETS, ES, TS, IFA-RT, BK, Saxon,

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EZT 250 - Hows yours running....

Postby Andy_C » Sun Aug 27, 2017 8:56 am

Had my latest ETZ for over a year now, and it just seems to get better and better.

it was prettty rough when I bought it but after lots of fiddling / fettling it runs really really well.

I never ceased to be amazed at how eager it is to rev, in fact it seems to like being ridden hard - the more revs the better.

Also found that it runs better on unleaded rather than super unleaded.

Been riding it a lot lately.

Oh and meant to have said I am running a 1 tooth smaller than standard gearbox sprocket - all my riding is done 1 up.
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Re: EZT 250 - Hows yours running....

Postby Mintonly » Wed Mar 14, 2018 12:13 am

:o wow that is great for you enjoy and keep riding :D
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Re: EZT 250 - Hows yours running....

Postby Blurredman » Wed Mar 14, 2018 7:49 am

I'm 1 tooth less at the front on my rebuild machine. The machine itself is still running in, but sometimes I can really feel that it is settling.

Compression must be really high as the bike occasionally starts up backwards when the start up has been finicky (cold etc), but re-starting normally sorts that out. The timing is actually set around 10 degrees before TDC so it is not the timing. It broke my tacho cable :( :lol:
1979 Suzuki TS185ER - 9,00 miles - Mud :)
1981 Honda CX500B - 77,000 miles - Long Distance :)
1987 MZ ETZ300 - 29,000 miles - Sun :) - Engine just re-built!
1990 MZ ETZ251 - 40,000 miles - Commute :) - Sleeping for a while! 1/2/18

ftp://blurredmanswebsite.ddns.net/Vehicle_Documents/MZ_Documents/
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Re: EZT 250 - Hows yours running....

Postby Guesi » Thu Mar 15, 2018 12:44 am

10 degrees is not correct.
MZ says 22 degrees.

Or 2,6 mm before TDC.

That is why your engine starts backwards....
Guesi Motorradteile
MZ spare parts
http://www.guesi-motorradteile.de
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Re: EZT 250 - Hows yours running....

Postby Blurredman » Thu Mar 15, 2018 3:29 am

Guesi wrote:10 degrees is not correct.
MZ says 22 degrees.

Or 2,6 mm before TDC.

That is why your engine starts backwards....


2.5mm before TDC is 30 degrees before TDC for me. That makes it run backwards 80% of the time and even switches whilst running. 1.5mm before TDC is 22 degrees and that makes it run backwards too.
1979 Suzuki TS185ER - 9,00 miles - Mud :)
1981 Honda CX500B - 77,000 miles - Long Distance :)
1987 MZ ETZ300 - 29,000 miles - Sun :) - Engine just re-built!
1990 MZ ETZ251 - 40,000 miles - Commute :) - Sleeping for a while! 1/2/18

ftp://blurredmanswebsite.ddns.net/Vehicle_Documents/MZ_Documents/
Blurredman
 
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Re: EZT 250 - Hows yours running....

Postby Guesi » Thu Mar 15, 2018 3:39 am

This is what the german manual says:

Ignition timing: 3,0-0,5 mm before OT = 22°15'-2° Kurbelwinkel
Guesi Motorradteile
MZ spare parts
http://www.guesi-motorradteile.de
Guesi
 
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Re: EZT 250 - Hows yours running....

Postby Blurredman » Thu Mar 15, 2018 3:47 am

Guesi wrote:This is what the german manual says:

Ignition timing: 3,0-0,5 mm before OT = 22°15'-2° Kurbelwinkel



I know, I have looked into it a lot. But doen't work for me. :smt006

I have a timing light with a degree offset and 22 degrees was 1.5mm before top dead. (for me..) :lol:
1979 Suzuki TS185ER - 9,00 miles - Mud :)
1981 Honda CX500B - 77,000 miles - Long Distance :)
1987 MZ ETZ300 - 29,000 miles - Sun :) - Engine just re-built!
1990 MZ ETZ251 - 40,000 miles - Commute :) - Sleeping for a while! 1/2/18

ftp://blurredmanswebsite.ddns.net/Vehicle_Documents/MZ_Documents/
Blurredman
 
Posts: 321
Joined: Sat Feb 09, 2013 3:59 pm

Re: EZT 250 - Hows yours running....

Postby Puffs » Thu Mar 15, 2018 6:41 am

The timing light/strobe indicates when it detects the ignition current. That's not quite the same.

If you know the conrod length & stroke you can calculate the relationship between ° advance & mm advance, BTDC. See attached, using L conrod = 132mm & stroke = 65mm. Yes, I make 22.25° = 22°15' about 2.995mm, so that's near enough. Yet 1.5mm BTDC = 15.7°BTDC, too late (little high end & may run hot).

Are you sure you filled-out the gap between piston & head OK?
MZ ETZ251, ignition advance, mm vs °.pdf
(120.87 KiB) Downloaded 41 times
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Re: EZT 250 - Hows yours running....

Postby Blurredman » Thu Mar 15, 2018 7:31 am

Thank you for the diagramme, Very insightful !
1979 Suzuki TS185ER - 9,00 miles - Mud :)
1981 Honda CX500B - 77,000 miles - Long Distance :)
1987 MZ ETZ300 - 29,000 miles - Sun :) - Engine just re-built!
1990 MZ ETZ251 - 40,000 miles - Commute :) - Sleeping for a while! 1/2/18

ftp://blurredmanswebsite.ddns.net/Vehicle_Documents/MZ_Documents/
Blurredman
 
Posts: 321
Joined: Sat Feb 09, 2013 3:59 pm


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