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Stuck choke
- freakinbike
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It's an 82 GPZ750, stock.
1982 GPZ750, stock (for now..)
1973 VW Bus
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- boatdrinks
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Charles
Madison, AL
1978 KZ650 B2A, Luminous Dark Blue
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freakinbike wrote: I just got my bike back from the shop (I'll admit it, I gave up and took it in for a diagnosis for a seemingly unrelated problem). When I brought it home, it took ages to fire up, then after it finally did, with the choke off, the rpms hovered at 4000, where it should be for the choke on. With the choke full on, it shoots up to 6000 rpm. I checked the throttle cable and it's not tugging at all. Thoughts?
It's an 82 GPZ750, stock.
I've had the enricher slide fail to seat entirely after use which causes fuel to continue to pour into the intake. Try manually depressing each of the enricher slides. Do any of them move down when pressed upon?
Bill
www.KZ1300.com
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1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
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- bluej58
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I thought you said the choke is stuck ?
78 KZ1000 A2A
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- freakinbike
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bluej58 wrote: I thought you said the choke is stuck ?
I thought that's what it was at first. Where is the enricher slide? I apologize.
Also, is there a vacuum diagram anywhere?
1982 GPZ750, stock (for now..)
1973 VW Bus
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- freakinbike
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I have another amateur question. How important is the diameter of vacuum lines? Obviously it needs to fit, but if the line is slightly wider/thinner, will there be negative effects?
1982 GPZ750, stock (for now..)
1973 VW Bus
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When there's no vacuum being applied to a vacuum petcock, fuel flow should be disallowed in the ON or RES position. PRI position allows flow with or without vacuum applied.freakinbike wrote: So I found a broken (ripped?) vacuum line, going from carb 2 to the fuel petcock. Odd thing about this is that the last time this line gave me trouble, it caused the bike to die. Now it's causing the opposite.. I don't get it.
I have another amateur question. How important is the diameter of vacuum lines? Obviously it needs to fit, but if the line is slightly wider/thinner, will there be negative effects?
No vacuum in ON or RES would mimic being out of gas (bike dies).
No vacuum in PRI would mimic air leak (racing idle).
Tubing size should be okay provided the wall-thickness is rigid enough not to collapse against itself when vacuum is applied.
Good Fortune!
1973 Z1
KZ900 LTD
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1982 GPZ750, stock (for now..)
1973 VW Bus
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freakinbike wrote: I replaced the line and the idle hasn't changed. I played with it between on, pri, and res and it wasn't affected. I suppose I could turn d
Yes, just turn down the throttle stop screw (idle speed) so the bike idles at about 1,000 rpm. When you are warming the engine up from cold use the choke to start the bike then as soon as possible turn it down to about 1,000 rpm. You should not let the bike "idle" at high rpm, especially when warming the engine. Letting a cold engine sit there and run above 1,500 rpm or so is not good for it. Warming the bike up properly should still take only a couple minutes. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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1982 GPZ750, stock (for now..)
1973 VW Bus
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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