07 Thruxton with no power, Please help - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 8 (permalink) Old 10-20-2019, 01:02 AM Thread Starter
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07 Thruxton with no power, Please help

Hello,

I recently acquired an 07 Triumph Thruxton and I am having some issues with little to no power. It is extremely sluggish and anything past roughly half throttle just bogs/does nothing. I dont know much about the bikes history, but supposedly it has just had the carbs replaced after sitting for a long time. It appears to be mostly stock. I also noticed it has new spark plug wires. The spark plugs look okay, maybe a little rich. The bike starts easily when cold or warm, and idles perfectly. It will rev in neutral no problem without hesitation and returns to idle immediately without hanging. Warm vs cold makes no difference in how down on power it feels. There is no popping or anything weird, just zero power, it struggles to reach 45-50 mph. Any ideas on what to check first? Im new to these bikes and could use some advice.

On a seperate note, where is the best place to acquire a service manual for this bike? Are there any pdf's available?

Thanks in advance for any advice/suggestions.

Last edited by capt slow; 10-20-2019 at 01:05 AM.
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post #2 of 8 (permalink) Old 10-20-2019, 07:05 AM
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Air filter . Many years ago I had been cleaning under the seat of my then bike put the seat back on went for a ride after a short time had the same problem . Rode home slowly on the reduced power removed seat and found the cloth I'd been using had been sucked in to the air filter . Bought a Haynes manual on ebay .
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post #3 of 8 (permalink) Old 10-20-2019, 11:30 AM
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Check the in line filter inside the fuel line where it plugs into the fuel ''T'' between the carbs.
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post #4 of 8 (permalink) Old 10-20-2019, 11:43 AM Thread Starter
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I opened the airbox and didnt see anything out of the ordinary. The filter looks brand new. I can see the marks on the frame where someone recently replaced it. I will check the fuel filter next.
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post #5 of 8 (permalink) Old 10-20-2019, 12:05 PM Thread Starter
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I dont see a fuel filter. There is a fuel line that goes from the petcock straight to a metal fuel-line between the carbs. I dont see a "T." The fuel line is connected to the petcock with a hose clamp.
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post #6 of 8 (permalink) Old 10-20-2019, 12:24 PM Thread Starter
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Okay, I confirmed that there is no fuel filter, its just a plain fuel line. I can see through it, there is not a screen or any other obstruction.
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post #7 of 8 (permalink) Old 10-20-2019, 01:54 PM
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Pull the hose from the carb end and with a container ready open the petcock to check fuel flow. If that's ok, and it probably is, you need to install a filter. Regardless of what you were told the carbs are probably partially clogged with the crud of dried ethanol deposits. Every jet and internal carb passage will need to be cleaned.
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post #8 of 8 (permalink) Old 10-20-2019, 02:30 PM Thread Starter
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I tested the fuel flow and it looks good. It flows freely.
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