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Speedy EFI 2008 running issue

252 Views 18 Replies 6 Participants Last post by  ve3hzz
Hello all, I have had a recent problem with a running issue on my speedy (or not so speedy at the mo) hopefully someone can come up with some suggestions to try and eliminate things,I have recently cleaned the injectors and new o rings, plugs ok and I fully serviced it not long before this issue, it starts but only runs for a few cycles and stops, start it again then runs for apx 3 seconds then stops, that was the reason for strip down thinking it was the injectors, however the day before that it ran and ticked over very nicely, any suggestions would be most helpful! cheers.
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Any fault codes showing?
There is a way to display them but you'd need to google it or search on this gorum for the details.
Other than that, kickstand cut-out switch ok?
Engine cut out switch ok?
Thanks for the reply, I was thinking the stand switch was ok although it has crossed my mind for further investigation there. I will have a look at the kill switch tomorrow that is something I havnt checked. cheers
Sounds like maybe a fuel pump problem. The fact it starts and then dies makes me think first it's fueling, and not electrical. If it is electrical it's intermittent and those are a bear to track down. My RD 350 had the same problem, it would start and run, then die. Restarting it would run a couple revolutions and die. Turned out it was the petcock was clogged. Since your Speedy is injected you might want to verify the fuel pump is AOK.

As far as im aware the fuel pump is working and seems to be delivering, it was one of the first things I check tbh and I seem to think its more fuel based rather than electrical, im getting a good spark at the plugs.
If the bike starts and idles then dies, it's either losing spark, fuel or air. Eliminate the last one and it's either fuel or spark. The only way to check if it's lost spark is to put a timing light on one plug and see if the spark stops after start. If the spark is good then fuel delivery is a problem. It could be a connection with the injectors. Try spraying some contact cleaner into the connectors. The fuel pump might cycle but that doesn't necessarily equate to adequate pressure. There are a lot of possibilities to track down> Wish I could give you the last thing to check because that's where it always is. Good luck.
all good on connections everything as it should be its witch craft! thanks for your time and help much appreciated.
So question. Did you put fuel in it just before this started to happen? The day before? Water in fuel takes a few hours to separate. It might be your sucking water into the injectors from the fuel pump or some causing the system to shut down to save the bike. If no codes present might not be? But put a can of seafoam or other water absorption additive in the fuel tank and swish it around then let it be till the next morning and try it again. It does sound like fuel related. If it was a small engine (lawn mower) I'd say you sucked up dirt into the fuel bowl and getting into the needle jet causing it to starve. Same can be true of moisture in the fuel system!

Worth trying but others will poo poo that idea I'm sure!!!
Triumph Codes


Press and hold down the "Info" button, turn ignition "on", observe window in left display until you see "dtc", as soon as you see "dtc" release the info button. A code will follow with "P" and four digits. P0000 = no faults.

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So question. Did you put fuel in it just before this started to happen? The day before? Water in fuel takes a few hours to separate. It might be your sucking water into the injectors from the fuel pump or some causing the system to shut down to save the bike. If no codes present might not be? But put a can of seafoam or other water absorption additive in the fuel tank and swish it around then let it be till the next morning and try it again. It does sound like fuel related. If it was a small engine (lawn mower) I'd say you sucked up dirt into the fuel bowl and getting into the needle jet causing it to starve. Same can be true of moisture in the fuel system!

Worth trying but others will poo poo that idea I'm sure!!!
All good with the fuel thing tbh but good thinking either way im in the middle of the road so to speak regards electrics or fuel! it wouldn't surprise me if it was a small obvious problem under my nose! both sides are firing and after a number of turns the pipes are generating a reasonable equal heat, if had been the carb model I agree it would be the first place I would go to.
Triumph Codes


Press and hold down the "Info" button, turn ignition "on", observe window in left display until you see "dtc", as soon as you see "dtc" release the info button. A code will follow with "P" and four digits. P0000 = no faults.
Thanks for the info unfortunately I do have the equipment/or the bike is not set up that way.
Fuel filter?
filter all good replaced at last service
Time to pressure and flow test the pump.
I just looked up the 2008 iteration of the Speedmaster and it states it's carbureted, now I'm confused. It it's the 2018 version it's injected, if it's the 08 version you have carbs, since you stated you cleaned the injectors it has to be a 2018 if indeed injectors is what you cleaned. A proper injector cleaning requires a tool that has a battery and power lead to open the injector and you flow cleaner through it both directions. If it's carbed then a strip down of the carb is required. So can you clarify what you have by reading the headstock plate and giving a proper date of manufacture?
I'm pretty sure 2008 was the change over year from carbs to EFI so could be arguably be either
I stand by my earlier comments and suggestions.....regardless if FI or Carb! but what do I know...I've got both FI and carb and experienced similar situations with both and it was infact WATER in the fuel! Hope you can figure it out and without a lot of cost! Rabbit holes are not fun!!!!
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