Carb Set Up for Piston Rebore

IrishKev · #1 PostAuthor: **IrishKev** » 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

kz900B1 · #2 PostAuthor: **kz900B1** » 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 :?:

IrishKev · #3 PostAuthor: **IrishKev** » 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.

Steve Cooke · #4 PostAuthor: **Steve Cooke** » 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.

IrishKev · #5 PostAuthor: **IrishKev** » 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.

Carb Set Up for Piston Rebore

Carb Set Up for Piston Rebore

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