Z1OwnersClub GB

Posted: **Fri Sep 18, 2009 9:07 pm**

Hi All
Hopefully somebody can help me with this question.
I have had to rebore my cylinder block of my A4. It was already using the first oversize piston and I have had to go up to 1015cc. Do I need to make any changes or adjustments to my A4 26mm carbs. I don't know but if someone who has done this before could drop me a line. I am hoping that I don't have to go to a set of 28mm carbs.

Thanks

Posted: **Fri Sep 18, 2009 9:12 pm**

Hi Kev,I don't think so.The first 1000's had 26mm carb's as well.Might need rejetting though :?:

Posted: **Sat Sep 19, 2009 10:52 am**

Thank Kz900b1,
Can you tell me what size I would need to rejet to as i am not so experienced with carbs.

Posted: **Sat Sep 19, 2009 12:46 pm**

Standard UK jetting on :-
Z900A4 / Z1000 A1
Pilot jet:- 17.5 / 17.5
Main jet:- 115 / 107.5
Needle jet:- 0-6 / 0-6
Jet needle:- 5DL3 / 5CN08

I wouldn't change anything to begin with they'll be fine, probably better. I'd give it a bit of a run and then check how it's running and possibly adjust the mixture as you would anyway.

Posted: **Sat Sep 19, 2009 6:14 pm**

Hi Steven
Thanks for that, i will stay with my current setup and make adjust as you suggest.

Z1OwnersClub GB

Carb Set Up for Piston Rebore

Carb Set Up for Piston Rebore