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Thread: Flamethrower?

  1. #91
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    What is the worst thing that could happen to you motor from it backfiring?
    you get singed arse hairs...

  2. #92
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    Quote Originally Posted by NighthawkNZ View Post
    you get singed arse hairs...
    LOL... Hair grows back... (Motor's not... )

  3. #93
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    I like how this thread has become technical

    I saw in one of my previous posts from when this thread began that I had the idea of getting a bit of metal elbow pipe so I could direct the flame further away from my arse, and an added benefit would be the spark plug could be mounted onto that so there's no need to cut up the muffler (will still have to figure out a mount for the pipe but there's 2 screws holding the muffler packing in so they could be used, should be easy). Not that this really matters as the pipe is bung. I'm likely to make my own at metalwork

    I just got the RG off Jamezo. It's sitting in my garage now

  4. #94
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    Quote Originally Posted by Coyote View Post
    I like how this thread has become technical

    I saw in one of my previous posts from when this thread began that I had the idea of getting a bit of metal elbow pipe so I could direct the flame further away from my arse, and an added benefit would be the spark plug could be mounted onto that so there's no need to cut up the muffler (will still have to figure out a mount for the pipe but there's 2 screws holding the muffler packing in so they could be used, should be easy). Not that this really matters as the pipe is bung. I'm likely to make my own at metalwork

    I just got the RG off Jamezo. It's sitting in my garage now
    Can your metal shop bend tube or are you going to weld the bend yourself?

  5. #95
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    Quote Originally Posted by degrom View Post
    Can your metal shop bend tube or are you going to weld the bend yourself?
    We have a manual pipe bender that highlights just how ridiculously weak I am

    Then I can weld a plate onto it with 2 holes so it can be screwed onto the end of the muffler without damaging the muffler. And it can be taken off for the warrant

    And the spark plug will be mounted opposite to where the pipe points out. I'll have to draw a diagram when i can be arsed

  6. #96
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    Quote Originally Posted by Coyote View Post
    We have a manual pipe bender that highlights just how ridiculously weak I am

    Then I can weld a plate onto it with 2 holes so it can be screwed onto the end of the muffler without damaging the muffler. And it can be taken off for the warrant

    And the spark plug will be mounted opposite to where the pipe points out. I'll have to draw a diagram when i can be arsed
    Sounds good...

    I have sorted most of the parts. Just waiting to payday to go shopping.

    What are you going to do to fit the spark-plug?

  7. #97
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    Quote Originally Posted by degrom View Post
    Sounds good...

    I have sorted most of the parts. Just waiting to payday to go shopping.

    What are you going to do to fit the spark-plug?
    Here's my painstakingly photoshopped plan view

    Might not be such a good idea as the spark plug lead will be in the wheels way. Simply having the spark plug on top would be fine
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  8. #98
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    Quote Originally Posted by Coyote View Post
    Here's my painstakingly photoshopped plan view

    Might not be such a good idea as the spark plug lead will be in the wheels way. Simply having the spark plug on top would be fine
    Just get a spark-plug lead with a 90 Degree bend at the spark-plugs end..

  9. #99
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    Quote Originally Posted by degrom View Post
    Just get a spark-plug lead with a 90 Degree bend at the spark-plugs end..
    Fair enough. Just a matter of waiting till next wednesday (payday)

  10. #100
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  11. #101
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    On a 4 stroke you will generally blow your exhaust to bits in short order. On a two stroke, there is a period of time when both inlet and exhaust ports are open together. If the backfire occured then I think you may lay waste to reed valves, carb slides, and even have airbox fires ! Not that I have ever seen it.... keep your camera handy Id love a copy of the video
    David must play fair with the other kids, even the idiots.

  12. #102
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    Quote Originally Posted by davereid View Post
    On a 4 stroke you will generally blow your exhaust to bits in short order. On a two stroke, there is a period of time when both inlet and exhaust ports are open together. If the backfire occured then I think you may lay waste to reed valves, carb slides, and even have airbox fires ! Not that I have ever seen it.... keep your camera handy Id love a copy of the video
    Can't a Four stroke have Airbox fires?

    We will post the video as soon as it's done...

  13. #103
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    Also, if you get a bang big enough, it would be strong enough to blow out the skirt of the piston.


  14. #104
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    Quote Originally Posted by degrom View Post
    Can't a Four stroke have Airbox fires?

    We will post the video as soon as it's done...
    Yes, it used to very common on cortinas and zodiacs with weber downdraught carbs.

    I'm not sure a backfire in the exhaust could cause it though, as inlet valve and exhaust valve are not open at the same time so I don't think your plan would cause it.
    David must play fair with the other kids, even the idiots.

  15. #105
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    I think I've mistaken backfires as something else. Isn't a backfire when exhaust gases light on fire creating that big bang? Or is that a backfire and can they really cause that much damage?

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