krexken
Zone Head
Posts: 732
|
posted September 01, 2010 04:41 PM
Stuck rings?
Working on a guys 1270 (zx12) that's been sitting about 5 years cause he wrecked it. I changed all fluids, gas tank, battery and got it running. It didn't sound real crisp down low so I pulled the plugs and did a compression check and sure nuff, #1 only has 70psi. Checked valve clearances and all okay.
My main concern is could I be doing further damage riding the thing with the stuck ring? I sprayed some good penetrating oil down in it while I have it apart. Perhaps that'll work.
BTW, it's got a Web intake cam with stock sprockets on it? The owner paid someone to put it together.
  
|
2000redrocket
Pro
Posts: 1662
|
posted September 01, 2010 04:52 PM
i would take it apart and see if the rings are really stuck or piston is broke around the rings. if it eats something it will not be a easy fix as it probally is now. plus the stuck ring may scratch the bore if it can not move around. heat makes them swell a lot. (get longer)
|
SteddyTeddy
Pro
Posts: 1664
|
posted September 02, 2010 04:51 AM
Don't risk it. Pull it apart and re-ring it.
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted September 02, 2010 02:28 PM
you can time a cam with a stock sprocket if you have a press and countless hours to fvck around, maybe they just got it close and said good enough
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
krexken
Zone Head
Posts: 732
|
posted September 18, 2010 07:10 PM
Would you believe that little pin that goes in the cam that's used to hold the exhaust cam rotor on was sticking down enough to keep the valve open just like a compression release. Just did a compression test and now it's the same as the others with pin in correctly. THe pin bolt wasn't loose either. Weird. You really can't tell it made any mark on the bucket at all. I obviously didn't have that cam lobe on it's heel very well when I checked the clearances earlier. Weird.
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted September 18, 2010 08:03 PM
freak incident
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
entropy
Moderator
Posts: 8671
|
posted September 18, 2010 11:22 PM
Ken,
how the hell that pin moved with the bolt tight is a mystery, eh?
____________
This moderator uses moderation in moderation
|
krexken
Zone Head
Posts: 732
|
posted September 19, 2010 03:23 PM
Maybe it was put together that way? It's got Webs on both sides so it's been apart before. Freeze plug in cam end was missing also. Didn't seem to affect cam wear but all the buckets have unusual wear patterns on them. They'll be happier with the cam plugged.
|
|
|
HOME
NEW TOPIC