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Engine going weak when riding
- EasyRider1
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1978 KZ650C
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- The Gringo
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- ¡Usted no necesita otra motocicleta!
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Andy
Akron, Ohio
80 Z-1 Classic-Sold
84 GPZ1100
79 KZ 1000 LTD
78 KZ 1000 A2
77 KZ 1000 LTD-Sold
76 KZ 900 The definition of a barn find
76 KZ 900-Sold gone to Denmark
KZ 750 times 3, KZ 650 times 8 Sold 1 down to 7
KZ 550 times 2 80 440LTD-Sold
81 CSR 305-Sold 81 Yamaha XS650 Special
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- EasyRider1
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1978 KZ650C
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- The Gringo
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- ¡Usted no necesita otra motocicleta!
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Andy
Akron, Ohio
80 Z-1 Classic-Sold
84 GPZ1100
79 KZ 1000 LTD
78 KZ 1000 A2
77 KZ 1000 LTD-Sold
76 KZ 900 The definition of a barn find
76 KZ 900-Sold gone to Denmark
KZ 750 times 3, KZ 650 times 8 Sold 1 down to 7
KZ 550 times 2 80 440LTD-Sold
81 CSR 305-Sold 81 Yamaha XS650 Special
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- BSKZ650
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77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
piglet, leggero harley davidson
SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
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- EasyRider1
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in addition to that also check the fuel filter to make sure its clean and not starving for fuel
I must admit, I am still a little perplexed about the timing thing. I am going to check my manual and see if I can borrow a timing light but maybe there are some other things I could check in the meantime (besides the fuel filter, I'll check that too)?
1978 KZ650C
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- BSKZ650
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77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
piglet, leggero harley davidson
SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
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- Skyman
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- 1978 KZ1000-B2 LTD 1982 KZ1000-M2 CSR
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You don't sound like an idiot at all. Under the point cover on the right side you will find the timing advance unit attached to the right side of the crankshaft. There should be 2 screws holding this cover on. The easiest way to check this is with a timing light. With the engine running and the light hooked up, when you rev the engine you will see the timing mark on the advancer move as the engine gains rpms. If you don't have a light, try to find a buddy to borrow one from or possibly check with autozone (they have a program where they will loan you tools with a deposit). I hesitate to tell you to tear the points plate off and remove the advancer to verify it's condition since that is going to require you to reset the points and timing. Better to verify it first in case it is not stuck and it turns out to be something else.
FYI, the '81 440 has electronic ignition--no points.
West Linn, OR
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- wiredgeorge
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wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
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- Link14
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The problems never showed up unless I was revving above 4500-5000 rpm's. Wired George could explain better, but I believe that's when the diaphram is supposed to lift the needle and open up the needle jet allowing more fuel to flow in the 1/2-full throttle range.
No lift - no fuel - depressing bogging sound.
Good luck!
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- EasyRider1
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A side note, when you replace the carb diaphraghm are you supposed to lube the sides of the slides?
Post edited by: EasyRider1, at: 2008/02/04 14:08
1978 KZ650C
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- Link14
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My guess is that the tolerances are so tight that anything that could increase the friction between the slide and the body should be avoided.
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