Pick Up Coil Air Gap?

Hi.
whilst renewing the pick up coil on my 12k mile 2006 Bonnie T100, I measured the old ones air gap. I could only get a 0.229mm feeler gauge between the coil and rotor pip. Spec is 0.8mm.
What does too close a gap do?
the new one is installed and set at 0.813mm nearest feeler gauge i had.
I have also replaced the single coil and HT LEADS.

Had the common fault of backfire and single cylinder running before dieing completely. Re starting after leaving to cool for a bit but rinse and repeat limping home.

the bike now starts better and warmed up smoother but need to ride to make sure 100% sorted.

 

Thanks,
I guess someone has been in there before me. I can't believe such a small air gap would have been set at the factory?
replaced coil n leads with TTP Blueflame anyhow, as relatively cheap components and should pep things up a bit?

 

Yeah..know there are lots of performance mods I can do but purpose of adding this bike to the stable was in keeping it standard. Hope the fixes have sorted it. Before buying a RE Continental 535 the Bonnie was favourite ride. Now the RE.....super grin factor.

 

I have test ridden and still have the problem. Retraced all previous work. Even swapped HT leads over but still the same.Still think it's electrical ignition. Checked for broken wires and thoroughly cleaned all connections.

New pick up coil is 560 ohms cold and 720 ohms engine hot. New coil is measuring 1259ohms hot and same room temp. Haynes manual quotes 15k ohms?

Could it be the ignition igniter unit as can't think what else in ignition circuit it could be?

 

Yeah.just ordered igniter from TTP. NO signs of damage to existing igniter but chatting to the very helpful guy at TTP he says he is selling a lot of replacements for Bonnies of my vintage. Also spoke to my garage guy I use for MOTs (whilst booking in another bike) and he confirmed your advice re resistance figures. If the igniter doesn't cure it then plenty more head scratching. I will keep you posted and thanks very much for your valued advice mate.

 

Good timing th

En.
Yeah On mine i can't see it's fueling issue as fine when cold all be It briefly. Lovely bikes when running fine. Hey ho...a good challenge for us all

 

Good timing th

En.
Yeah On mine i can't see it's fueling issue as fine when cold all be It briefly. Lovely bikes when running fine. Hey ho...a good challenge for us all

 

The t100 pick up coil connector is under the tank/seat frame. Access by removing rh side panel trace wiring from alternator cover. On mine it has 2 wites. A blk and red. It's a tight squeeze to uncouple but be patient and don't yank too hard on the wires! Good luck.

 

A bit more info. Suddenly wondered if it was a battery issue. Swapped out but no difference. A desperate measure but you never know.
So,gone back through my servicing record and the fault first appeared after I had done valve check but not as severe and had ridden with no issues until now. Had to replace 7 out of 8 shims. From my notes am absolutely certain everything went back together correctly and mechanical timing is correct. I have experience doing valve checks working on mainly jap multi cylinders Inc the R1 5valve/cylinder head so the Bonnie much simpler...however could I have missed something?

 

Nope...rev counter does not die when misfire and subsequent stall occurs. When checking valves I did not disturb any wiring in headlight. What do the connectors I might of missed do under tank?
If mechanical timing was out would fault occur from cold?
Will get the deoxit out and attend to parts you suggest. Starting week of night shifts now so limited time. TTP igniter will arrive tomorrow so try and fit that then. Silly question. How does the plastic stud holding the r side of the igniter come apart?

 

Yes...I hope it is the igniter. Seems funny how started happenning after valve adjustment though but probably a coincidence. Will have more time next week so if igniter doesnt cure it will go back in there and double check mechanical timing and valve clearances The last time it ran well for 20 or so miles a couple of weeks ago it was a joy to ride so am dobtful it was the valve check work. Will update once new igniter installed.