Throttle Setting

Evening, all.
Does anyone have a list of bits needed to set up the fuel tank, and power the pump, so as to adjust the throttles? 675 Street has been poor recently, missing at low throttle position. Had the plugs out today, all good. Coils checked, good resistance and insulation. Bluetooth OBD scan showed no error codes but cylinder one reading was 940pHa, two and three are 820. Would that be enough drift to cause poor running?
Cheers, guys.

 

Good morning, Eldon, thanks for your thoughts. I don't feel any issues when opening the tap, it pulls well (as best as I perceive). While filtering, on the daily commute, it is most pronounced, up to around 2,500 rpm.

 

Morning, Pegscraper. The bike had a major Triumph service around 18 months ago when the valves should have been done. Whether they were or not is open to debate I guess. I don't have a garage (the shed is full of other stuff, after being built specifically as workshop ) so I may have to speak nicely to some friends and peruse that line of investigation. I did tackle my Sprint RS valves many years ago, I distinctly remember the pain of removing, and refitting, the cam cover

 

Thanks, Iceman. No fault codes logged, even when battery voltage is low and it causes a restart of the fuel system and clocks. Booked in with Triumph for some help.

 

First off, apologies for the slow update.
Where am I, right now? Dropped the ST at the dealership a couple of weeks back and the result of the investigation was underwhelming. Possible charging problem!? and no real insight into the poor running. As an example, fitted a freshly charged battery last Tuesday and it managed to start the bike six times before saying 'that's enough'. For context, five of those occasions had ten mile rides between them. A thousand pounds to change the stator and rectifier, parts and labour. I don't think so. The only lead was the suggestion that the rubber connectors between throttle bodies and intake manifold could be suspect for the running problem. That isn't unreasonable as I had them off when changing the oil pressure switch but this issue didn't start right away. They could have moved slightly now, with use, allowing a leak of some sort, yes.. So, I had another session beneath the fuel tank and managed to measure the stator windings. Each one read 0.6 ohms which, although Haynes say Triumph don't quote a figure, they were consistent with each other, I think that is a win. I did look at checking the rectifier but, with the frame in the way, I couldn't just pull the wiring off and the rear suspension makes removing the unit a pain without exactly the correct combination of ratchet and socket length combination. The tech did refit the the clutch switch that I had removed during the previous 'non-cranking' episode. His advice was that the ECU monitors the clutch action, besides at the start sequence - I'm sceptical but don't know, myself. I still aim to try and test the regulator but, having no garage, I'm at the mercy of the weather gods.

 

First off, apologies for the slow update.
Where am I, right now? Dropped the ST at the dealership a couple of weeks back and the result of the investigation was underwhelming. Possible charging problem!? and no real insight into the poor running. As an example, fitted a freshly charged battery last Tuesday and it managed to start the bike six times before saying 'that's enough'. For context, five of those occasions had ten mile rides between them. A thousand pounds to change the stator and rectifier, parts and labour. I don't think so. The only lead was the suggestion that the rubber connectors between throttle bodies and intake manifold could be suspect for the running problem. That isn't unreasonable as I had them off when changing the oil pressure switch but this issue didn't start right away. They could have moved slightly now, with use, allowing a leak of some sort, yes.. So, I had another session beneath the fuel tank and managed to measure the stator windings. Each one read 0.6 ohms which, although Haynes say Triumph don't quote a figure, they were consistent with each other, I think that is a win. I did look at checking the rectifier but, with the frame in the way, I couldn't just pull the wiring off and the rear suspension makes removing the unit a pain without exactly the correct combination of ratchet and socket length combination. The tech did refit the the clutch switch that I had removed during the previous 'non-cranking' episode. His advice was that the ECU monitors the clutch action, besides at the start sequence - I'm sceptical but don't know, myself. I still aim to try and test the regulator but, having no garage, I'm at the mercy of the weather gods.

 

I tend to agree, Iceman. Testing in situ is a pain, I'll get one ordered. I recall reading somewhere, as with a Kawasaki brake switches being a straight swap, there is an alternative fit for regulators but can't remember where it was now.

 

I think the problem is a system charging one and the batteries I have are now not managing as well having to do more work when the bike is running. Yuasa have been my go to make but I may try a Motobat this time.

 

I'll have to revisit that when I have time between work and the weather.

 

So...I had a mobile mechanic visit on Saturday. Long story short, the Street is behaving like a Triple again. Starts a treat and is running well. The throttle cable was inexplicably taught and seemed to have the position sensor confused. Charging, as it turns out, was the stator although I had measured the three phases for resistance.