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Thread: 2020 Beta 300RR wont start

  1. #1
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    14th August 2022 - 20:34
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    2020 Beta 300RR wont start

    Looking for ideas of why it wont start
    I have spark and fuel
    Drained fuel and replaced and also removed jets to check if blocked
    Swapped of spark plug with a spare

    Bike was started 2 weeks ago with no issues

    Any help would be appreciated

  2. #2
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    25th March 2004 - 17:22
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    Roll it down a hill.

    Pwk carbs some people lay the bike over to flood the carb a bit more. But 2 weeks should be nothing.

    I'd try a 3rd plug.

    Check choke is holding up OK.

    Float level should not leak on sidestand, but start to if tipped a bit further.
    Don't you look at my accountant.
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  3. #3
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    14th August 2022 - 20:34
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    Quote Originally Posted by F5 Dave View Post
    Roll it down a hill.

    Pwk carbs some people lay the bike over to flood the carb a bit more. But 2 weeks should be nothing.

    I'd try a 3rd plug.

    Check choke is holding up OK.

    Float level should not leak on sidestand, but start to if tipped a bit further.
    Thanks Dave,

    New spark plug fitted and still not going

    Chock is clicking up so I say its working correctly

    I have tried to bump start in driveway but it didn't work... not a hill but differently fast enough to get it started

    Some things i have noticed is when I give it a bit more fuel it sounds like it want to go but to much throttle and it backfires. When i drain the bowl more fuel runs out of the overflow... is that normal?

  4. #4
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    Hmm. OK going out on a limb.
    Is the throttle closing properly? Like if you snagged the cable loading it up on the trailer, pulling it out so it hangs up on the adjuster?

    Either end.

    Closing it should bonk on the carb body.
    Reason I ask is that it can feel ok at the throttle, but if the slide is hung up 5mm, you won't start it until you get it spinning fast enough for long enough. Unlikely off the start button. Dangerous if it does. Should have mentioned that before I said crash start it.
    Don't you look at my accountant.
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  5. #5
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    Quote Originally Posted by F5 Dave View Post
    Hmm. OK going out on a limb.
    Is the throttle closing properly? Like if you snagged the cable loading it up on the trailer, pulling it out so it hangs up on the adjuster?

    Either end.

    Closing it should bonk on the carb body.
    Reason I ask is that it can feel ok at the throttle, but if the slide is hung up 5mm, you won't start it until you get it spinning fast enough for long enough. Unlikely off the start button. Dangerous if it does. Should have mentioned that before I said crash start it.
    I think it is, when I had the carb off the other day i did check the throttle was was moving but didn't pay to much attention to the gap. I'm thinking of check the reed valves too.

  6. #6
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    You'd be seriously unlucky for the reeds to break. Betas are usually pretty reliable.
    Don't you look at my accountant.
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  7. #7
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    When you tried bump starting, what gear did you have it in? First or second is too low and will probably just lock the wheel. Try third or fourth. push the bike up to speed, dump the clutch. Might help, couldn't hurt
    it's not a bad thing till you throw a KLR into the mix.
    those cheap ass bitches can do anything with ductape.
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  8. #8
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    I have seen reports of wires chafing though on the headstock, although I think that was the model before, I'd also check the flywheel hasn't come loose
    "If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."


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    Even BP would shy away from cleaning up a sidecar oil spill.
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  9. #9
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    Quote Originally Posted by F5 Dave View Post
    You'd be seriously unlucky for the reeds to break. Betas are usually pretty reliable.
    You'll right, the reeds are fine.

    The carb is making that donking noise when I close it but it looks like there is a small gap at the bottom.

    Spoke to bike shop and suggested to take spark plug and tip the bike over and see if fuel comes out, he is thinking fuel may have got into the bottom end.
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  10. #10
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    Quote Originally Posted by Kickaha View Post
    I have seen reports of wires chafing though on the headstock, although I think that was the model before, I'd also check the flywheel hasn't come loose
    Thanks Kickaha, wires are ok and it has had the loom changed because of that happening.

    If the flywheel was loose wouldn't I hear it when I try to start it?

  11. #11
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    OK that's OK for carb position.

    GG have a removable bung bolt so you can drain cases if drowned. Or gas flooded. A lot of Euro bikes did. Was a bit surprised my Beta doesn't.
    Don't you look at my accountant.
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  12. #12
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    Quote Originally Posted by RR 300 View Post
    If the flywheel was loose wouldn't I hear it when I try to start it?
    Nope, we were on a ride when that happened to a guy on a Sherco, it wasn't obvious until the cover was removed, we had stopped and we went to move on his bike would not start
    "If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."


    Quote Originally Posted by scracha View Post
    Even BP would shy away from cleaning up a sidecar oil spill.
    Quote Originally Posted by Warren Zevon
    Send Lawyers, guns and money, the shit has hit the fan

  13. #13
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    Wink

    Quote Originally Posted by Kickaha View Post
    Nope, we were on a ride when that happened to a guy on a Sherco, it wasn't obvious until the cover was removed, we had stopped and we went to move on his bike would not start
    Had a look today and flywheel in tight and has all teeth.

    thanks for the suggestion

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