A bit of 1200TS problems.

;)

Regarding needles, I just looke at Andy Wagners page, and he lists the K14 needle as standard for the 1200ts. K1 for the rest.

Airfilters are off the bike already. Didn't make any difference.

Regarding choke plungers: Last year we drove a trip together, where my friend on his 1200ts couldn't really drive the bike. It spluttered and coughed, untill he noticed the chokes were on... ;)  Mine's got a return spring, and I only use them to start. Never drive with them.

Cheers on the middle notch. I'll make sure of that.

Carbs will be off later today.

Kind regards,
jacques
 
Okay, so I was just informed, that the cylinderhead on my friends 1200ts is a modified RGS, which is ported and valved bigger. I am going to measure that later.
Bikes' got Jota cans.

Kind regards,
Jacques
 
seems to me like you need to go down a new route.
It could be that you have a broken valve spring, with (maybe) one circle snapped off, the valve will still close, so a compression check does not show this, and it will always fire on all three, but it will give the symptoms you are describing, because as revs rise above 3,000 the need for a "quicker" response from the spring gets greater, it is very hard to see without taking the motor apart and taking the valves out of the head, but this could actually be it. And while we are here, never, never, never, remove the head from the motor with it still in the chassis. It can be done (and it does get done) but its just not worth it on so many levels.
CLEM
 
Alright Clem, if taking the carbs apart and a thorough look and setup does reveal anything. I may suggest that to the owner.

Kind regards,
Jacques
 
Indeed I am, and today, before dissasembly, we started it and ran it with open fuelcap. No difference. Then off went the tank again, opened both fueltaps and it runs out ncely on both primary and reserve on both sides. Filters clean.

Off went the carburettor set and I have it on the desk in my small workshop now. It kind of got late, as we spent time looking at other bits and bobs to be ordered for the biek, and we also took a peek at the new version of the DMC ignition that will go on, when the bike's up and running, plus we looked what we have in stock for fitting the new 3.1.2 stainless oversized fownpipes and collector from Gijs Van Dijk. Also to be installed once it up and running.

So only Little Progress today, as I also had to Work on my own bike, making mods to my new rear Wheel lifter, to install the new rear brake disc, fully floating.

Kind regards,
jacques
 
The Bosch ignition should advance at about 3000rpm. If it isn't advancing would it fit your symptoms? I keep thinking that your problems appear to be caused by storage, rather than while riding, so maybe less likely to be mechanical breakage?

5 minute check with a timing light. Quicker than pulling the head, but not as much fun perhaps  ;)

 
Went through the carbs today and every part is as it shoul dbe. Bodies ultrasonically cleaned for a few hours. New hardware and gaskets. Didn't find anything wrong yet.
Making a new clutch hose tomorrow.

Kind regards,
jacques
 
if the ignition is not advancing , then it will still run fairly well if a bit down on power, but it will run VERY VERY week
don't ask me how I know.
CLEM
 
Have you checked the HT leads and caps. Had similar symptons a while ago. As they were the original parts 40 yrs old I replaced them. Used NGK caps and copper cored HT lead ,problem solved.
Wellsy
 
We changed plugs and looked for clear sparks, which there are.
I'll measure resistance on caps. Any specific value they should be, like for example 1 KOhm?

Kind regards,
Jacques
 
Resistance of caps measured tonight. Left: 15,7 KOhm. Middle: 12,4 KOhm. Right: 4,76 KOhm.
3 new caps ordered.
Carbs reinstalled and I found that the choke cables were swapped: short on right side, long ones on middle and left side. And the splitter sat outside and far away from the ring-shaped holder on the frame. Front choker cable rounted wrongly and with sharp bend. Chokerknob's cable routed incorrectly and very tight, so could not move freely. cable mounting inside the central part of the splitter crossed over, so kind of stuck.
Rev counter cable had incorrect routing and two Sharp bends.
All rerouted and positioned correctly. Chokerplungers and O-rings lubed and installed. Basic carb settings done. Made sure chokercables and plungers were at rest at the bottom position, with no pull. Same height.
inlet studs and plastic spacers and O-rings all taken off, cleaned, lubed and reinstalled. No leak seems to be there.
Sump plug and copper washer reinstalled.
Engine is still open to receive new gaskets, slavecylinder O-ring etc. Owner now gone on vacation for two weeks, and I have no Space in my own garage for the 1200TS, so will take a break while waiting for parts from OCT.
I am looking for a ingition tester meanwhile. And a procedure to perform the test of the aforementioned ingition advance on the two Bosch BTZ boxes.
I'll continue asap and report back here.
Thanks to everyone so far !  ;)

Kind regards,
jacques
 
Lets hope so, and that together with a variety of other small problems, may or may not be the culprit. But have to wait 2 weeks to Work on it Again.
Kind regards,
jacques
 
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