- Posts: 1
- Thank you received: 0
#4 not firing
- phoenixunseen
- Topic Author
- Offline
- User
- Got a '78 KZ 650 C back in May. It's my first!!!
Less
More
23 Jul 2014 09:44 #641074
by phoenixunseen
Party Hard!!!!!
#4 not firing was created by phoenixunseen
So, the last time I started my bike I noticed that the far right side (I believe that's the #4 cylinder) wasn't getting warm at all where the far left side was at normal operating temperature. If I'm not mistaken, #1 are fired by the same coil. Anybody got any Ideas?
Party Hard!!!!!
Please Log in or Create an account to join the conversation.
- Grumpy Ole Artist
- Offline
- User
- Eschew Obfuscation!
Less
More
- Posts: 497
- Thank you received: 62
23 Jul 2014 10:53 #641083
by Grumpy Ole Artist
1978 KZ650 B2
Former rides...1976 CB360T, 1985 Shadow 700, 1985 GPZ750Turbo
Replied by Grumpy Ole Artist on topic #4 not firing
Not an expert, others will certainly join in, but since I stumbled across this first... :whistle:
You are correct in that 1 & 4 fire off of the same coil. 1 is firing but 4 is apparently not...need to verify...pull plug, reinsert into cap, ground against block, crank her over & look for a fat Blue spark at the #4 plug...No spark? Assuming plugs are all in good order (not fouled, correctly gapped, &c) , original plug wires? try cutting a 1/4 inch off the plug end of the #4 plug wire, and re-threading the cap back on. that can fix it sometimes ..not too much exists between the coil and the plug...check wire & cap separately for continuity(mainly) & resistance...See fat Blue spark at grounded plug? sniff plug/cylinder..if it smells like gas, could possibly have float level too high in that carb...essentially "drowning" spark (Flooding that cylinder) Like I said, others will certainly chime in, but there are a couple thoughts for ya...Good luck!
You are correct in that 1 & 4 fire off of the same coil. 1 is firing but 4 is apparently not...need to verify...pull plug, reinsert into cap, ground against block, crank her over & look for a fat Blue spark at the #4 plug...No spark? Assuming plugs are all in good order (not fouled, correctly gapped, &c) , original plug wires? try cutting a 1/4 inch off the plug end of the #4 plug wire, and re-threading the cap back on. that can fix it sometimes ..not too much exists between the coil and the plug...check wire & cap separately for continuity(mainly) & resistance...See fat Blue spark at grounded plug? sniff plug/cylinder..if it smells like gas, could possibly have float level too high in that carb...essentially "drowning" spark (Flooding that cylinder) Like I said, others will certainly chime in, but there are a couple thoughts for ya...Good luck!
1978 KZ650 B2
Former rides...1976 CB360T, 1985 Shadow 700, 1985 GPZ750Turbo
Please Log in or Create an account to join the conversation.
- 80B4
- Offline
- User
Less
More
- Posts: 447
- Thank you received: 105
23 Jul 2014 12:01 #641092
by 80B4
1980B4 1000
1978 Z1R
1978 B3 750
Replied by 80B4 on topic #4 not firing
Switch the plug wires 1&4. If #4 still does not get hot, you have dirt in the #4 carb.
1980B4 1000
1978 Z1R
1978 B3 750
Please Log in or Create an account to join the conversation.