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air in cylinder to keep valve closed...true?
- apbling
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- Kidkawie
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- I bleed premix
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1975 Z1 900
1994 KX250 Supermoto
2004 KX125
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- bountyhunter
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1979 KZ-750 Twin
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- testarossa
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- Attack life, it's only trying to kill you.
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1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
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- TeK9iNe
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- What did you do!?!
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I know how to get them off fine, but back in...???
Is there really a tool for this?
The air and rope methods work fine, I've even heard of guys just dropping a balloon into the cylinder then blowing that up and tying it. When your done, just pop it and pull out.
Good Luck.
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
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- Jack
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79 KZ 1075 MKll
79 KZ 1500 MKll dragbike
Gone but not forgotten:
3 X 73 Z1's
1 X 74 Z1A
1 X 75 Z1B
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- 650ed
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- TeK9iNe
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Jerry rigged a tire iron and the cap portion a valve spring compressor to depress springs and put the keepers on the stem.
:laugh: Nice.
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
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- larrycavan
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If the seals are shot, the valves are usually coked up pretty badly. On old bronze guide heads, the guides are most always shot.....
Before going to all that trouble do this first.
Pull the spark plugs out. Turn the motor over and looking through the plug hole, have a good look at the seating face of the valves and look for heavy carbon build up.
Sometimes the intakes will be seating well enough but the exhausts will almost always be in need of refacing and seats cut.....
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- testarossa
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1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
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- Jack
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79 KZ 1075 MKll
79 KZ 1500 MKll dragbike
Gone but not forgotten:
3 X 73 Z1's
1 X 74 Z1A
1 X 75 Z1B
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- sparkn
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I've never bothered doing any headwork without taking it off so i am pretty curious about... how do you re-compress the valve springs to get the keepers back in during install?)
I use a valve spring compressor that looks similar to a gear puller (tricky to use and not incredibly safe). I've seen safer ones that attach to the rocker studs/camshaft rails that have a lever that compresses the spring like a camshaft lobe would. I would prefer that style if I could find one for my bike.
1979 KZ650 SR
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