Spark plug gap???

Does anyone have the gap specs for a 1982 750 Maxim spark plugs?

 

.023 to .032 in. is what I have read, hope that helps.

 

my 82 750 seca has a spark gap of 0.7~0.8 mm
ngk bp7es plugs

 

Keep it to less than 0.023" Or you will get sparking probs.

 

shouldn't that be 0.28 to 0.32?

 

The Haynes manual says .023-.032 inch or .7mm-.8mm. However, there are things in the book that i have found aren't so correct, perhaps this is the case?

 

I'll have to politely disagree Danilo, it would be unwise to gap the plugs that close together. The plug would fire way too soon (with an underpowered spark) and misfires would be likely, resulting in carbon buildup.
Wizard is correct. 0.028 - 0.032 is the optimal range for a NGK BP7ES used on our beloved 650 and 750 XJs.
I'm in California so I set my gap at 0.030 and have a beautiful "tan" on my plugs. If I were in colder climates, I might be tempted to take it in a bit for easier starting in the morning.
Unaverage is in MN and should be fine with 0.030 during the summer riding season. Tweak to desired tasts, readjust for colder riding.

Edited by Robert, forgot the zero. Sorry 'bout that.

 

FYI:The Haynes manual states .028-.032. Not .023-.032.

 

I stand corrected, guess I better re-gap my plugs too!

 

Couldn't hurt and will give you piece of mind. Don't forget the anti-seize on the threads and dielectric grease on the spark plug caps.

 

Sorry Robert that's a missinformation answer.
These old bikes use a WASTED spark system . Another stupid engineering sideroad (iinvented ?) by yama . Mercifully now long dissapeared
Time has proven that these have difficulties RELIABLY firing at 24 thous Now add 25 or more years of Use to a not overly powerfull Ignition system and see what result you get. Too small is not a real world issue, adequate spark most definitely IS.

 

I totally agree Danilo, 20+yrs on these coils has proven to be a weakness of the system. Hmm... I thought the wasted spark system was fairly ingenious myself, could you expound upon your experiences, I'd like to know more about any issues.
Problem with these bikes is neglect tends to kill the coils. I find time after time that the high tension leads corrode and lose their ability to give solid performance. Poor power transmission equates to weak spark or no spark at all. I'll also agree that a healthy set of coils will fire happily at a tighter gap, you do have a very good point. My initial experience with the stock coils was actually pretty good. Didn't get to replacing them until around '93 and then just for snots-n-giggles.
The other weak point is the pickup coils.
Bottom line is age is the enemy, best be thinking about replacements or upgrades early. Support for our machines is waning.

 

So, what can we replace the stock coils with?

 

Dayna or Accell coil kits are available. Give Chacal a jingle.

 

I got gas and air but can not get spark from plugs no action just turns over and over