Engine failing after some pull

Hi guys , today i went for spin , everthing alright , but after hitting 190/200 km/h the engine stop pulling and sounds like working on 3 cylinders . Stoped the bike , turn off the engine , checked for something wrong but didnt see anything wrong.
Fired the engine again and was running fine.
This happen once in the past in the same circumstances.
I know that Stator and rectifiers blade conectors are a little rusty , and i hear a ticking sound from the rear cylinders , like sparks.

Im sure the coils , spark wires are old stock, can be this?

Can someone give some hints on this ?

 

T he plugs for the stator (three yellow) and your rectifier (three yellow - red/black) going into the battery on the right side of the bike have connectors, I eliminated these and hard soldered them. I use clear shrink tubing from the aviation shop I work at, kinda cool as you can see the solder joint. I use the butt connectors along with a crimp and solder. Good idea to upgrade to a Mosfet regulator. There are tons of articles out there. Keep up the good work and enjoy the journey.

 

Thx for the reply . Already replaced the stock Rectifier with a upgraded Yamaha R1 .

I really need to check all connectors from the bike , special the ones that are ignition/ coil related.

 

try switching plugs around or replace the one in the cylinder youve concluded has quit firing. it might be helpful to test pickup coil resistance [at the plug] when engine quits.

 

I have fired the engine and all runs fine. But almost certain that if I pull hard again it will happen again..

I really need to dip all connectors in white vinager+salt to clean all those oxydized copper and solder them. Also measure coils and wires.

 

are we betting this an electrical, not mechanical or fuel-related problem ?

 

It seems that way.

Today I removed the tank and this was what I discovered:

- Spark plugs torqued by hand ( almost loose)
- green plug not plugged correctly ( near fuel pump)
- Missing band on carb insulator/boot
- Alternator conector is very rusty .
- Cylinder 1/3 plugs wet and dirty .

 

carry on we expect youll have your problem sorted by next week, so get busy.

possibly a problem with one of the pickup coils if two plugs loose spark.

 

Well I decided to go full throttle and do everything at once .

Fairings out to paint shop.
Hangers and other metal parts going to powder coating.
Wheels will go out tomorrow to be powder coating also.

 

Looking forward to the next installment...

 

Today I have tested all Coils , and seems they all are good ann into the stock values ( Honda manual) .
Also tested outside making ground with the spark plugs tip , and I have spark.