1983 Gpz 27k Starts but No Power!!

TexKZ,
yes i definitely do not want to explode while riding... actually just replaced the intake and airbox boots, and cleaned the carbs before mounting everything up!

hi steve,
so all the plugs were white [Cylinder 2-4] running lean!! but cylinder 1 was black, and attached a pic.. I also drained the oil and refilled to the right level, and am not getting oil in the airbox anymore.. Thanks again for the backup, it might be jetting? or seized ring??

hey guys update on the GPZ,
I drained the oil and refilled to the correct level, got vaccum caps for ports 1 2 and 4 on carb + capped airbox breather hole. I warmed the bike up with some light riding, and she still has no power as i pull the throttle and backfires alot.. I pulled the plugs and #2 #3 #4 were lean all electrodes were white and #1 was black.. I put some Marvels down cylinder 1 and will pray to the moto gods that the rings are just seized :woohoo: i will do a leakdown and compression test to get a clear read .. still contemplating: rings? petcock/vaccum issue?? jetting?

Did you do the thumb test? Could be bad valve guide seal on #4.
Steve

steve,
just cover the spark plug hole and crank it?

Talking about the large vents upper back of the carbs. Lift the slide, put your thumb over the vent and watch how fast the slide moves down.
Steve

ahh ok to check the diaphrams!! do u have any advice on carb removal? Im running the factory airbox but MAN, it is a serious task to remove the carbs without destroying the airbox boots

Heat gun or hair drier. You can get new ones. Pics whenyou get them off would help.

Steve

Are the little plastic plugs still in your carbs .Part 92055 www.partzilla.com/parts/search/Kawasaki/...TOR+PARTS/parts.html

Bought a bike with them missing ran like yours .

hey riturbo,
I bought some and put them on the carb yesterday... Still had issues tho, are yours capped at 1, 2, and 4? [after the Emissions delete]

kosh3rhalal wrote: hey riturbo,
I bought some and put them on the carb yesterday... Still had issues tho, are yours capped at 1, 2, and 4? [after the Emissions delete]

I think he is talking about the plastic plugs that go INSIDE the carbs, to cover the jets. There is one in each carb.
Click on the link he provided. It's ref # 11012A (click on the description, "CAP", to see the full part Number 11012-1244) which consists of a "cap" and O-ring ref #92055 ( "RING-O,PILOT JET CAP" part number 92055-1337).

The earlier Gpz and the later Gpz don't have them. I think they were only on the 82/83 550 H models.

oh! Dang, ill have to take the carbs off tonight and check them out... I dont recall if they had them or not, you think thats the reason im lean in 3 cylinders? thanks for pointing that out