Ping Sweller

I'm making plans to revive the MZ, namely, throwing a new lump into it.

Is there any difference in the carb jetting between the ETZ 250 and
ETZ300? - I've possibly got a 250 lump to sling in, but it's a bare
engine without the carb.

Cheers,

 

SteveH said...

What happened to the 300 lump?

 

I was a TC and left it idling on the drive, welding the big end bearing
to the crank.

 

" "

 

Yes, yes, we covered this last summer when it happened.

 

That's why I wasn't saying anything. If anything, it was pointed at
Loz, who obviously can't remember. Again.

You're so fucking sensitive, Steve. You need a reality check.

 

So why didn't you reply to him then, if that was the case?

Not on this occasion, methinks.

If anything, you're the one over-reacting...

 

From the factory book (of which you should have a copy on the disk I gave
you)

ETZ 250
Carb: BVF 30 N 2-5
(the key number is 30 - compare it to the cast and stamped numbers on
your carb)
Main Jet 135
Pri. Jet 45
Start Jet 110
Needle valve 20
air screw 1 turn out
Needle 2 A 531 (C 6) with 5 notches
Needle pos. 3rd from top

The only real diffeences will probably be main and primary jets.

HTH