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Ignition Timing vs Speed
- Schmeck
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13 Aug 2013 23:55 #601335
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Ignition Timing vs Speed was created by Schmeck
Okay so I finally got my bike put back together after dealing with some problems. My question is , How does ignition timing gap effect acceleration through gears? My bike accelerates rather slow where before I could drag it up the road fairly quick. Im assuming its the ignition timing . It is set to .305 I believe , where as before it was .354 . Just curious if this change in gap is my problem. -Tyler
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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- 650ed
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14 Aug 2013 00:28 #601340
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Ignition Timing vs Speed
The gap controls the dwell; this is the percent of rotation that the coils receive a charge. You don't want the dwell to be too much or too little, so you should set your points gap to the spec in the manual. On the KZ650 the gap should be set to .35mm; your model bike may be different.
The timing of the opening of the points relative to the crankshaft position controls when the coils fire. This normally is set with the "F" mark at the pointer at idle (950-1050 rpm), and it will (should) advance to a max level as the the rpm rise. Ed
The timing of the opening of the points relative to the crankshaft position controls when the coils fire. This normally is set with the "F" mark at the pointer at idle (950-1050 rpm), and it will (should) advance to a max level as the the rpm rise. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- Schmeck
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14 Aug 2013 00:56 #601347
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic Ignition Timing vs Speed
Okay , And for once I got my kz750 to idle right. Before it was 2000 rpm And now its slightly above 1000rpm. I will play with the gap alittle bit and see what changes occur at different settings.
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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- kaw-a-holic
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14 Aug 2013 02:13 #601361
by kaw-a-holic
Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
Replied by kaw-a-holic on topic Ignition Timing vs Speed
Make sure everything on the advancer is clean and lubed
Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
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14 Aug 2013 02:15 #601362
by kaw-a-holic
Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
Replied by kaw-a-holic on topic Ignition Timing vs Speed
Have you given any thought to switching to electronic ignition? Or are you keeping everything stock?
Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
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- Schmeck
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14 Aug 2013 16:32 #601444
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic Ignition Timing vs Speed
I have thought about switching to electronic ignition. I wouldnt know where to begin with it as I just got familiar with my stock ignition timing . How does the electronic ignition work exactly? Installation, tuning, and where to get one for a 1978 kz750 twin ? And I have sprayed my advancer numerous times with wd40.
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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- MFolks
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14 Aug 2013 18:51 #601458
by MFolks
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Replied by MFolks on topic Ignition Timing vs Speed
WD-40 is not a good lube for moving parts. I use a light coating of high temp grease on my bike's advancers moving parts(pivots for the weights, the tube the advancer moves on, and the spring attachment areas).
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
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- Schmeck
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14 Aug 2013 22:40 #601487
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic Ignition Timing vs Speed
I have a can of grease in my garage , I'll give that a go to see if it helps. I have the bike air-ing out right now. I Think it flooded and fouled my plugs , probably too rich ect. I will return with results, Thanks all
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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- Grumpy Ole Artist
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15 Aug 2013 10:54 #601558
by Grumpy Ole Artist
1978 KZ650 B2
Former rides...1976 CB360T, 1985 Shadow 700, 1985 GPZ750Turbo
Replied by Grumpy Ole Artist on topic Ignition Timing vs Speed
Pop your fill cap and give your oil a "sniff test" if it smells like gas, it's OUTTA there!
1978 KZ650 B2
Former rides...1976 CB360T, 1985 Shadow 700, 1985 GPZ750Turbo
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15 Aug 2013 16:45 #601581
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic Ignition Timing vs Speed
forgive me but what do you mean outta there ? Meaning I need more oil cuz i am low?
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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15 Aug 2013 18:42 #601596
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic Ignition Timing vs Speed
So I just pulled my spark plugs and wow . left plug is pitch black and right plug was brand new not a dang scratch except it was bent at the tip . How far in should I be tightening these. Im guessing not too tight cuz i just bent a spark plug
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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- Grumpy Ole Artist
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16 Aug 2013 11:06 #601675
by Grumpy Ole Artist
1978 KZ650 B2
Former rides...1976 CB360T, 1985 Shadow 700, 1985 GPZ750Turbo
Replied by Grumpy Ole Artist on topic Ignition Timing vs Speed
Sorry if I was unclear! I mean change your oil if it smells like gas.
1978 KZ650 B2
Former rides...1976 CB360T, 1985 Shadow 700, 1985 GPZ750Turbo
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