- Posts: 2494
- Thank you received: 43
Exhaust valve color analysis?
- 79MKII
- Topic Author
- Offline
- User
- Love Them Kaws!
The other 3 valves are dry and flat black looking - looks like a typical carbon coating from an exhaust. The #1 ex valve is super shiny black and looks wet. All around the #1 exhaust port is the same. I touched it and it's not wet - it actually feels sticky, kind of like syrup.
Does that color indicate an issue with the #1 cylinder? The rebuild only has around 600 miles on it with ALL new parts. Anyone ever see this?
Thanks
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
Please Log in or Create an account to join the conversation.
- PLUMMEN
- Offline
- User
- Posts: 8139
- Thank you received: 104
Still recovering,some days are better than others.
Please Log in or Create an account to join the conversation.
- Old Man Rock
- Offline
- User
- Posts: 6224
- Thank you received: 225
Hmmm, where's Larry when you need him.....
Assuming compression tests and leak down tests within specifications, have you been using any kind of additive (fuel or oil) or any crap other then oil?
Possibly a seal deterioration but doubtful... sticky...:blink:
Spark Plug sticky as well then?
Possibly something coming from the carb.... Intake manifold have the same sticky crap present?
Open carb bowl, have sticky black crap in it?
Beats the hell out of me....
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
Please Log in or Create an account to join the conversation.
- Motor Head
- Offline
- User
- FIX UP YOUR BIKE RIGHT AND CHEAP
- Posts: 5138
- Thank you received: 391
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Please Log in or Create an account to join the conversation.
- 79MKII
- Topic Author
- Offline
- User
- Love Them Kaws!
- Posts: 2494
- Thank you received: 43
I'll check the plugs for sure and maybe the intakes if I have a chance. I'll try to post some pictures too. Never really seen anything like it.
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
Please Log in or Create an account to join the conversation.
- PLUMMEN
- Offline
- User
- Posts: 8139
- Thank you received: 104
if it starts puffing a little oil when you start it up down the road pull the head off and fix it over the winter
Still recovering,some days are better than others.
Please Log in or Create an account to join the conversation.
- TeK9iNe
- Offline
- User
- What did you do!?!
- Posts: 2440
- Thank you received: 28
Can be tested by misting water on exhaust pipes to see if it vaporises after a minute of idling.
Seen this before when cylinder was just blowing some fuel/air mixture through but not ignighting due to bad sync/mix screw setting.
GL.
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Please Log in or Create an account to join the conversation.
- 79MKII
- Topic Author
- Offline
- User
- Love Them Kaws!
- Posts: 2494
- Thank you received: 43
dont go omr on us,relax and ride the damn thing! :laugh:
if it starts puffing a little oil when you start it up down the road pull the head off and fix it over the winter
:laugh: :laugh: That is so funny! I do drive myself crazy sometimes (it's a short drive anyway). I almost didn't even post it but just couldn't help myself. :laugh:
Now that you mentioned it, I noticed a little puff of smoke at start up lately. Would that indicate a leaky valve seal? Everything was new 600 miles ago - valves, valve seats, seals, guides, springs, lifters, everything.
Yea, good winter project.
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
Please Log in or Create an account to join the conversation.
- Motor Head
- Offline
- User
- FIX UP YOUR BIKE RIGHT AND CHEAP
- Posts: 5138
- Thank you received: 391
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Please Log in or Create an account to join the conversation.
- PLUMMEN
- Offline
- User
- Posts: 8139
- Thank you received: 104
oh yeah i almost forgot omr just signed a 5 year $25 deal with mothers plug electrode shine,commercial should be coming out soon! :woohoo:
Still recovering,some days are better than others.
Please Log in or Create an account to join the conversation.
- 79MKII
- Topic Author
- Offline
- User
- Love Them Kaws!
- Posts: 2494
- Thank you received: 43
Oh, no additives or anything in the gas - just super unleaded. It's weird that all 4 exhaust match each other isn't it? Why would it be different in the head - it's only about a half inch away.
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
Please Log in or Create an account to join the conversation.
- Old Man Rock
- Offline
- User
- Posts: 6224
- Thank you received: 225
As I recall, some of you where informing Keith the same thing "Oh just ride it" well I was one who stated naw, open her up...
And what did he find... Cam chain jumped off the gear.. :ohmy: Tore shit up nicely at that as well...
So there...
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
Please Log in or Create an account to join the conversation.