- Posts: 124
- Thank you received: 1
cylinder not firing, then OK
- hypnohio
- Topic Author
- Offline
- User
1982 KZ440 LTD
2003 EN500 C
2006 Virago 250
Please Log in or Create an account to join the conversation.
- apbling
- Offline
- User
- Posts: 999
- Thank you received: 12
Anyway, your situation... Have you checked valve clearances, inspected coils/wires/plugs? maybe your pilot circuit is dirty or someone tinkered with it? Have you balanced/synched your carbs at all?
Please Log in or Create an account to join the conversation.
- bountyhunter
- Offline
- User
- Posts: 7246
- Thank you received: 337
1979 KZ-750 Twin
Please Log in or Create an account to join the conversation.
- martin_csr
- Offline
- User
- Posts: 8068
- Thank you received: 1656
Please Log in or Create an account to join the conversation.
- hypnohio
- Topic Author
- Offline
- User
- Posts: 124
- Thank you received: 1
1982 KZ440 LTD
2003 EN500 C
2006 Virago 250
Please Log in or Create an account to join the conversation.
- hypnohio
- Topic Author
- Offline
- User
- Posts: 124
- Thank you received: 1
apbling wrote: I have similar issues with my 750-4. #1 doesn't fire when choked. Runs fine and dandy otherwise. Carbs are spotless, so I have no clue what the deal is. Once you crack the choke to about 3/4 from full it starts to fire. Reproduceable all day long.
I'm glad to hear someone else is experiencing this - your description fits perfectly, especially cracking the choke to about 3/4. Carbs are synched, valves are set, and new wires and caps on the plugs made no difference. Since it's running fine otherwise it's not a life or death issue, but really has me stumped.
1982 KZ440 LTD
2003 EN500 C
2006 Virago 250
Please Log in or Create an account to join the conversation.
- MFolks
- Offline
- User
- Posts: 6650
- Thank you received: 540
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Please Log in or Create an account to join the conversation.
- hypnohio
- Topic Author
- Offline
- User
- Posts: 124
- Thank you received: 1
1982 KZ440 LTD
2003 EN500 C
2006 Virago 250
Please Log in or Create an account to join the conversation.
- bountyhunter
- Offline
- User
- Posts: 7246
- Thank you received: 337
Almost impossible. The spark plugs on a twin are in series across the HV winding of the coil secondary. The current to make either plug spark passes through both plugs. Only way to get a single plug firing is to short across the other plug's gap or short one plug wire to ground. An open wire, fouled plug, etc will cause both plugs to not fire because they are in series.martin_csr wrote: The problem could be the spark plug wire connections which become poor from oxidation over time.
Learned this the hard way when my 750 twin was fouling the left plug and would strand me. Even though the right plug was fine, zero spark at either plug.
1979 KZ-750 Twin
Please Log in or Create an account to join the conversation.