Power Lost Power Drop 2022 Thruxton Rs

Discussion in 'Technical Help' started by FTFS, Oct 7, 2024.

  1. FTFS

    FTFS New Member

    Oct 7, 2024
    1
    3
    New York City
    Sudden throttle and engine power loss.

    I have a 2022 Thruxton with 8,000 miles.

    While riding on the highway at around 75-80 mph, I lost throttle response, the engine was still running, and the bike started slowing down. The engine light came on. This happened twice during a 7-hour ride, both times around the 5-hour mark. I pulled over, turned the bike off, then back on, and it ran fine until the second time, about 30 minutes later. Turned it off and back on. After that, the rest of the trip was fine.

    I’ve been having battery issues (bought a new one but haven’t installed it yet.) For the past few weeks, the bike has sometimes struggled to start. It would try to turn over, fail, then start successfully on the second attempt. Every time this happened, the trip meter reset.

    I’m unsure if the problem is with the battery or bad gas.

    I always use 93 or higher octane gas when available. I added a small amount of STP fuel treatment, I normally use Lucas but they didn't have any. This was a day before the issue and filled up about 3 or 4 times after.

    I also recently added throttle spacers to remove the throttle slack, which works great, but I don’t think that’s related.

    About two months ago, I had a warranty issue with the clutch, and they replaced the whole part.

    Anyone have any ideas what could cause this issue of sudden throttle and engine power loss?

    Thank you so much.
     
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  2. sprintdave

    sprintdave Nurse,he's out of bed again

    May 25, 2014
    1,532
    750
    Birmingham
    Well if I were you I would put the new battery on (assuming it is fully charged) seeing as you have one there.
    Bad fuel could well be the issue, the stp treatment shouldn't do any harm. I don't know what octane fuel I use but I only use E5, never E10 in my T509.
     
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  3. Kinjane

    Kinjane Active Member

    Oct 15, 2017
    238
    43
    Bristol, Land of Enger
    #3 Kinjane, Oct 13, 2024
    Last edited: Oct 19, 2024
    Shame E5 will be phased out in 2026.


    Edited to show correct information/ newspaper rumours, fuel type changed from E10 to E5.
     
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  4. Boothman

    Boothman Noble Member

    Jul 26, 2023
    655
    443
    Wigan
    #4 Boothman, Oct 13, 2024
    Last edited: Oct 14, 2024
    Did you mean E5?

    EDIT - I’m confused (it doesn’t take much) I was asking a question as a ban of E10 sounds less likely than a ban of E5, but the disagree makes me think I’ve got completely the wrong end of the stick. Anyone cast any light on the situation for a numbnut like me? Thanks
     
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  5. learningtofly

    learningtofly He’s not the Messiah, he’s a very naughty boy!
    Subscriber

    Sep 25, 2018
    2,073
    1,000
    Hertfordshire
    Have you checked the fuel line from the tank isn’t kinked?
     
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  6. Jimbo1950

    Jimbo1950 Well-Known Member

    Oct 6, 2022
    63
    68
    Scotland
    I had a similar problem with my Speed Twin 1200, virtually the same engine as the Thruxton. A new battery cured it, no problems since then. I use E5 petrol whenever possible, and avoid supermarket pish unless it's Tesco E5. In the UK E5 is either 97 or 99 RON, depending on which brand you buy.
     
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