Topic: 78 750 f3 questions hot running engine.

[lostmykeys]

  I would use the search function but it dosent seem to work.
 1.how hot do these things get?My valve cover gets hot enough to boil water.
 2.What can cause pinging besides too much advance? my bike pings a little when leaving a stop.
 3. my plugs are gapped at .28 is that too much? Would .24 help it run cooler?
 the bike is all stock new oil and filter,new air filter,valves and cam chain adjusted,points checked,carbs taken off and cleaned.

[lostmykeys]

  a couple more ?s
1. how can you tell if the filler cap on the gas tank is cloged? I ran a wire through the hole and blasted it with carb cleaner then blew through i could just get a little air flow through the cap.
2.How strong should the springs be on the spark advance? I can pull the weights away with my fingers and it snaps back,is that good enough?

[cmonSTART]

Pinging caused by preignition and/or detonation can be caused by a few things.  Overheating, too much advance in the ignition, too low octane gas being used, among a few other things. 

Edit:  You should be able to pull the advance weights out with your finger and they should snap back, but that really just a rough test. 

[killersoundz]

Excess heat is scary, my cousin bought a suzuki gs650. I notice the left cylinder was heating up way faster and way hotter than the right one. I thought it was an oiling problem and well after it started making terrible noises I'm pretty sure I was right. haven't heard anything about it since then 

[lostmykeys]

 Could a bad condenser cause pinging? I dont know for sure if one of the condensers is bad as every thing behind the cover looks new.

[cmonSTART]

Ya, like killersounz suggests, it might not be a bad idea to check the oil pressure if you haven't and pull the valve adjustment plugs to see if the top end is getting oil.  Just to be safe. 

I don't see how a bad condenser could do that. 

[lostmykeys]

oiling problem makes engine hot causes pings,makes sense because it doesnt start pinging right away.
 So is there a way to remedy this seafoam?

[lostmykeys]

 when I pull one of the plugs with the engine running I presume...how much oil should I see? Does it squirt, flow,or should it just look oily.
 Thanks for the replys

[cmonSTART]

I would recommend doing so after shutting the bike down.  Loosen the caps up a bit, shut it down, and take a peak.  If you do it with the engine running it will be pretty messy. 

Edit:  This may be of some help if it is indeed an oiling issue.  http://forums.sohc4.net/index.php?topic=78643.0

[lostmykeys]

 Ill have to check that later the last time I rode the bike was about two hours ago so I'm sure the oil would have gone back down to the bottom of the engine by now.I'm starting to think im just polishing a turd but this thing really runs nice exept for the pinging and fuel starvation at high rpm's other than that its silky smooth. I just want to get this pinging issue worked out before I mess something up.

[cmonSTART]

Still having the issues at high RPM's?  I think I remember that post.  Do these issues coincide with the pinging? 

Edit:  Pinging and high engine temps can also be consistent with a lean condition.  Something else to think about. 

[seanbarney41]

+1 on the lean condition can cause pinging...I would definately try double checking point gap and timing, check your advance with a timing light...could try a cooler heat range spark plug as a temporary band aid.   Any oil fouling on your plugs?  Oil in combustion chamber can also cause pre-ignition/detonation.

[lostmykeys]

 It only pings when im taking off from a stop or if I give it gas when moving slow and its very hard to hear.
If its pinging at higher rpm's I wouldn't be able to hear it with all the wind noise.
 As far as my high rpm issues i'm still working on that.as far as the two problems being related I'm not sure.
 Thats why I asked about the spring tension in the spark advance and if a condenser may be causing both issues.
 My gut tells me that the high rpm problem is fuel starvation as I have an inline filter and Im not sure about the gas cap vent.
 I did go to the garage and take one of the valve adjustment caps off as you suggested and everything had a glaze of oil on it that I could see. Ill check it again with the engine running I have lots of shop towels.

[lostmykeys]

 what would be cooler as far as plug gap? .28 or .24 or does it matter?
 The plugs in the bike now are new NGK d8ea with a .28 gap.

 I just picked up another  set of new NGK d8es plugs.
 

[lostmykeys]

 I wonder if elevation might have something to do with this,my town is at 5000 ft above sea level.
 But my z1 never had these problems and its been to 11,000 feet with my wife on the back.

[lostmykeys]

 One more thing,I heve one of those cam cover breather filters on my bike that looks like a tiny K&N pod filter.
 Could that cause overheating?

[seanbarney41]

how about a pic of those plugs?  ...I've been told by my motorcycle shop (they are very knowledgeable, but not necessarily sohc experts) that d8es plugs are a new replacement for d8ea and run about half a heat range hotter than d8ea...I don't think plug gap has much, if any, affect on heat range, unless it is so big that the plug won't fire, then it's really cold ...I would stick with factory recommended plug gap though

[lostmykeys]

 Ill pull the plugs tomorrow and check their condition.If they look like their running lean then the only thing that would be suspect to me would be the airbox carb conection and Im not even sure if that is a big deal as I'm sure I got the boots right and the airbox to go over the last groove closest to the carbs.
 If a vacume leak at the carb airbox is a potential problem I would like some help on how to fix it.