Pick Up Coil Air Gap?

Well despite only few hours sleep I was woken by postman delivering my new TTP Igniter. Fitted in ten minutes and started bike from overnight cold. Started and warmed up well to idle off choke after 10mins or so. Could only manage trip up and down my street so by no means a conclusive test. However, ran for about 20mins and not a hint of a backfire. Hopefully take for proper test tomorrow when supposedly dryer. That's everything in ignition circuit replaced so fingers crossed. Keep you posted. BTW...TTP service, packaging and quality of products is excellent.

 

Well ran for 45mins on and off and still have the problem.
When warmed up completely and ridden misfire and eventual stalling occured. Stayed local so limped to home.
Immediately tested spark which is good both cylinders. By replacing complete ignition believe could now be fuelling? Reason. Idle was erratic and when tried to adjust cant now achieve an idle and just stalls.
Will double mechanical timing from valve check. Then remove carbs and clean etc. This could be a long one to resolve and any advice appreciated.

 

Oh also, misfire seems to clear enough to restart when on sidestand and why does Haynes manual advise idle adjustments with bike on sidestand?

 

Yeah. Pugs One of first things I did. Yeah silly me re sidestand...worked that out shortly after posting. Have removed carbs because there was again a lot of debris when draining bowls. Carbs off and quick check over suggests someone had already been in there before as usual rounded bowl screws tale tale signs.
The carb to head rubbers had quite a bit of fuel in them. All rubbers seem ok and not too hardened.
They definitely need an ultrasonic clean and set up. My local reliable mot guy has quoted me £80 for strip and clean plus parts. Will change bowl screws for Allen bolts for ease of access for next time. Couldn't believe how easy and quickly the carbs came out! Definite change to the struggle multi cylinder jap bikes can be. On the bright side, once sorted should be good for years. Keep you posted.

 

yES..aM DETERMINED TO KEEP POSTING UNTIL RESOLVED.
Whoops...hit the CAPS key.
Had another odd hour before setting off to work so tackled the float bowl screws. 6 out of the 8 needed drilling and an extractor to remove! was straight forward though if you take your time.
Removed one bowl and the mess inside is certainly not going to help my problem if not the cause.
Totally coated in brown varnish, debris in bottom of bowl. So will drop carbs off hopefully tomorrow to get ultrasonic clean and then a rebuild kit etc. Sorry...should have photographed but was pushed for time.
As a bit of history. The bike was not used between 2009 and 2017 so guess it was stored with fuel in carbs and the it went off. It was running fine when bought it a year ago so didn't suspect carb issues. All the symptoms when the rough running/misfire/stall from my research and advice has pointed to ignition from documented experience of this beast. Maybe I had a problem there too as a bad bit of luck? £450 spent on ignition components which is a bummer but have replaced with TTP improvements so when resolved. The bike should be completely sorted. As I've said. wanted one of the carb 865's in this colour to keep stock and enjoy as is. This should definitely be the case.....at some stage!

 

See also my TPS thread.
Well, there's an old saying "90% of carburetor problems are electrical" So after completely replacing my ignition components with the fabulous TTP offerings my misfire/rough running/stalling problem remained. After completely stripping, ultrasonic cleaning and rebuilding the carbs with proper set up. Thoroughly Cleaning the tank and tap filters the Bonnie runs like a dream! No popping on overrun and bags of pull through the rev range. Loads smoother. It's a cliche, but feels like a different bike!
So note of caution to you all. On the older bikes get those carbs off, clean them and set them up properly. You won't believe the difference! Thanks to all for the interest and helpful advice during this journey.

 

When weather is more conducive to pulling plugs at the side of the road l will be doing a plug chop check to see how its performing in its current state of tune. Only have TOR exhausts fitted from stock but do have larger main jets to swap out should l decide to improve airflow with free flow filter and snorkel removal.

 

Advice once again heeded. So, will probably just go with the snorkel removal/mod as per TTP. Have not researched yet but is the internal baffle straightforward to remove?