etz 250 to 300 conversion help

[webhead]

hello there anyone know what i need to make my 250 a 350 is it a case of barrel and head ,or do i need that and carb aswell ,does it fit straight on many thanks.

[Skorpion]

webhead.

Your own Cylinder Barrel and Head can be rebored to take a standard ETZ301 piston, no change of carb or jetting needed.
contact.

Burwin Motorcycles Ltd
380 Essex Rd, Islington
North London,
N1 3PF
Tel 0207 359 3050

[Old Dog]

Yep, that's all there is to it. The OEM 301 engine has been mooted as the best 2T motor they ever made. I have a 251 motor with a 301 topend. Bing carb from the 251 all fitted into an ETZ250 chassis. Works beautifully!! just gives it that little bit of oomph in the midrange.

The other truly useful option is the MZ-b ignition system (they are no longer MZ-b but close enough) brilliant, more revs plug and play and forget it!

Let us know how you get on...

PS note what Skorpion and I are talking about is the 291cc designated 301 not a 350cc conversion.

[webhead]

i c so i just get it bored out nice easy then, wicked and what is this ignition thing you say to get where from sounds good.

and also what size wheel should be on the back mines an 1986 and it says 18 ,is this right i thought it was a 16 inch ,many thanks.

[Old Dog]

It's a little thing called the internet - google MZ-b and all will be revealed.
You will need a 301 head to go with the barrel or get the existing one modified.
Depends on the model. If yours is the 251 then it is 16 rear and 18 front. If it is the 250 then it is 18 front and rear. Get in touch with the MZ riders club and get yourself a copy of the appropriate manual. Again google - MZ riders club.

[webhead]

It's a little thing called the internet - google MZ-b and all will be revealed.
You will need a 301 head to go with the barrel or get the existing one modified.
Depends on the model. If yours is the 251 then it is 16 rear and 18 front. If it is the 250 then it is 18 front and rear. Get in touch with the MZ riders club and get yourself a copy of the appropriate manual. Again google - MZ riders club.

hi thanks for the info ,cant wait to try it out mines a 250 ,i thought a saxon electrics would have been good ,i thought they where electronic ,you could just put those electrics on surely????

[Darklord]

I any electronic ignition system will do the trick as they have program advance and retard built in which allows more revs and more bottom end power over a points set up.

[DAVID THOMPSON]

READ BELOW NEW ADDRESS FOR THE ELECTRICAL ITEMS FOR MZ AND OTHER OLD BIKES


viewtopic.php?f=18&t=3811

www.mz-b.de and www.powerdynamo.biz/
by DAVID THOMPSON » Mon Oct 19, 2009 1:30 pm

new address
what used to be http://www.mz-b.de for all mz 2 stroke bikes is now split between 2 web sites
http://www.mz-b.de is still parts but links to the place in Hungry
the new home page for electrical is
http://www.powerdynamo.biz/

http://www.powerdynamo.biz/eng/sitemap.htm

look up your bike here http://www.powerdynamo.biz/deu/systems/lists/mz.php
best stuff made for a conversion this is about as good and easy as it gets
and made for more than just your mz they make many others
dave