Enfield Bullet 350 Sidecar Build

Discussion in 'Hacks' started by 65bellett, Feb 18, 2013.

  1. 65bellett

    65bellett Adventurer

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    O.k guys I will start this thread with an admission "I am a masochist who enjoys riding a small capacity old fashioned bike as far and as wide as I can". My 350 Bullet has been a long term project and I think I have finally got it to the point where it is a reliable and fun form of transport so it must be time to whack a Hack on it:rofl

    My plan at this stage is to build a light weight hack that will allow me to take my kids for a ride (1 at a time) as they are not legally allowed on the back of the bike until they are 8 years old and will also allow me to carry all of the necessities (and a few luxuries) on those longer trips. I understand that power will be a big issue with this outfit but my 350 is a long way from standard and as the Bullet was built for over 60 years there are a lot of larger engine choices if the bug bites and I want to go a bit faster.

    So far I have had a bit of a play on the computer and made a bit of noise out in the shed and come up with a bit of a plan of what I want to do. All of the RHS I am using at the moment is 30mm x 30mm x 3mm. This material is fairly heavy but it is relatively cheap strong, and easy to work with.

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    I am very new to this sidecar building business and at this stage I am pretty much working it all out as I am going along. I have spent hours and hours going through the different build threads on here and have found them really helpful. I look forward to getting all of the answers to all of the difficult questions from you guys in the coming weeks:evil and I also really want to hear your suggestions for the build.
    #1
  2. larrylarry75

    larrylarry75 Aye Chihuahua

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    Hoo Boy, I'm gonna follow this thread! Got two questions for you, what year is your bike and have you any solid build plans you can refer to or are you intent on re-inventing the wheel? Fun, fun!

    LL75 :clap
    #2
  3. OLDHIPPIE

    OLDHIPPIE Adventurer

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    lookin good man.
    i have a 500 efi w a inder hack love it!!

    Ride on
    tom
    #3
  4. Leaf

    Leaf Been here awhile

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    That's gonna be mighty cool!

    :lurk
    #4
  5. 65bellett

    65bellett Adventurer

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    Hi Old Hippie I would love to see a pic or two of your Rig. I love the look of the Inder Retro. LL75 as far as solid build plans are concerned....... I have solid ideas about the wheel base/track, how the sub frame will mount to the motorcycle and how the side car chassis will mount to the sub frame. As far as the bodywork is concerned and how the suspension will work.........well that is still under investigation.
    #5
  6. OLDHIPPIE

    OLDHIPPIE Adventurer

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    im not very computer savy but ill gladly email u any pics u want.
    guess im way behind in the tech world lol

    ride on
    tom
    #6
  7. OLDHIPPIE

    OLDHIPPIE Adventurer

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    what year is ur 350??
    #7
  8. 65bellett

    65bellett Adventurer

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    The Enfield is a 1970 model but it has a lot of the modernish gear in it like twin leading shoe front brake and 12 volt electrics.

    I got a little bit more done today. I still need to work out another mount point to connect subframe/rail into the front bottom bracket/engine mount. It all seems quite solid and looks as though it clears every thing it is supposed to but I am going to take it for a ride to work tomorrow just so I can give it a real world test.

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    #8
  9. OLDHIPPIE

    OLDHIPPIE Adventurer

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    #9
  10. kshansen

    kshansen kshansen

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    [​IMG]

    Those front motor mounts look like a good place to attach a bracket to support the lower front of subframe.

    I'd also consider moving the whole subframe closer to the center of bike, less flex on the mounting points.

    I'm not a big fan of the U-bolts around the frame for the upper front mount, put a lot of stress in a narrow area. If nothing else could you find a piece of tubing, say 3mm or thicker, large enough on the inside to wrap half way around the down tube to spread the load out?

    One more idea. Use a section of the blue tubing as a spacer between the upper end of subframe and the down tube. This would put the threaded rod under tension load and less bending loads.

    Guess I should be working on my XS400 subframe instead of telling you how to build yours!
    #10
  11. davet2

    davet2 Been here awhile

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    I imagine you have checked this out, but it looks like the brake pedal will interfere with your subframe. Do you have enough travel? (sorry if this is a stupid question)
    #11
  12. claude

    claude Sidecar Jockey

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    I agree with kshansen. read his post carefully I may be out of line here and Hate to be critical but what you have there as it is will create issues. Sidecar outfits, no matter what they are made up of, tend to carry some precious cargos. Not only that but any failure no matter if it is from a manufactiurer or a homebuilt can cast a bad light on the whole sidecar world in many ways. Please feel free to give me a call if you wish..NO THIS IS NOT A SALES PITCH! I am only expressing a concern that may save you from isssues down the road. Maybe take OLDHIPPIE up on his offer in his post too.
    #12
  13. OLDHIPPIE

    OLDHIPPIE Adventurer

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    on my dealer installed the hack sub frame attaches to the front motor mount on bottom front and the uppre part of downtube in the rear its mounted at passenger peg and upper shock mount. i emailed 65bellett some pics
    hope that helps

    Ride on
    tom
    #13
  14. Slade 330

    Slade 330 Adventurer

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    I see on your plan that you still have to finish mounts, so I will wait for the end result.
    should work out fine with a light chair. Building a sidecar is not rocket science and the forces generated for general road use is not great. Start smashing it up and down desert tracks and you need to start thinking about all sorts of things and destructive forces. So you can build for intended purpose thats OK.:ear
    #14
  15. D.Bachtel

    D.Bachtel Been here awhile

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    I agree with the others. Way too much dangle going on.
    You're creating structure that is bound to flex.
    Tuck it in as close as you can to avoid a hinge.

    Here's what I did on my Greeves.. up front sandwiching the engine plates,

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    Your subframe doesn't have to be one piece, you just need four good points that will enhance and strengthen the bikes frame to create a unified structure.


    Don in Nipomo
    #15
  16. XL-erate

    XL-erate Been here awhile

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    Sorry, but I'm not going to be nearly as kind as others have been. I would have kept silent till I read that you planned to take the most precious cargo in the world for rides with it: your kids!

    What I see in those photos is a recipe for disaster, add in pain and death if it ever saw a human passenger. Pics aren't clear enough to tell for sure but that looks like hardware store all-thread as your main support structures? Do you have any idea of the actual metallurgy and strength of that stuff you used, that's possibly made in China depending where purchased? That is its strength in relationship to Grade 3, Grade 5, Grade 8 or ungraded?

    With the all-thread bolts hanging out in space what's supposed to support sidecar dynamic loads, cornering forces, flexion? The metal tab used on that front support clamp doesn't look nearly thick enough to function as a clamp, even enough to withstand necessary forces to tighten it in place, let alone support a load.

    The tubing dimensions look too small and too thin walled for any genuine structural integrity or load-bearing strength. There's a direct relationship between tube dimensions/wall thickness and structural load carrying ability. I'd say you need to do more research there. Also gussets are needed at all angled joints, especially the rear.

    As that's currently built I would hesitate to use it to hang a heavy saddle bag. I'd have kept my mouth shut if it wasn't for the possibility of that setup causing extremes of pain, injury and even death for whatever innocents get involved. Please do more research and accept the other member's prior suggestions and offers of guidance. I just don't want to see you or anybody else get hurt or killed, especially your children!
    #16
  17. Slade 330

    Slade 330 Adventurer

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    vWhy don't you wait untill finished I think this is early R&D
    #17
  18. claude

    claude Sidecar Jockey

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    Speaking of flex....some may say that sidecars do not create much stress etc on mounts in 'normal' use. This is really not true. Although one may not see a failure right away that does not mean it will not occur. Almost anything that flexes is prone to failure at some point. Bend a paper clip back and forth a few times and it will break. OVERBUILDING is far bette than underbuilding!! Good friend Hal Kendall used to say " build it stout out of things you know about" !! Not a bad thought.
    Anything that is fabricated does have some chance of failure. All the cars do not finish the Indy 500 every year. In racing crashes are inevitibale but the ones that come from a failure of a part do get the attention of everyone right away. There ar epictures of some pretty good builds here at ADV. DON'T SKIMP!! The pictures just posted by D. Batchel are definately on the right track.
    Again, I am not wanting to be critical but sometimes ya just gotta do what ya gotta do.
    #18
  19. XL-erate

    XL-erate Been here awhile

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    Believe me, Slade, I hate to be hyper-critical in public. However three things overshadow my holding back from comment. First, he said he plans to take his kids for rides in this rig! To me there's nothing more valuable in all the world than a man's children. I'd rather step on toes to protect them than be the cause of their inury or death by my silence.

    Second, I have no idea of knowing how fast the build will progress, so for all I know he could be taking the kiddies for a ride this afternoon!

    Third, if that is indeed hardware store all-thread, ungraded, possibly made in the orient of vastly inferior materials and production methods and heat treating, then no amount of waiting will make things get better. If that's what it is it's never going to be up to the task demanded of it and that's the main support of the whole sidecar rig!

    I mulled it over for awhile, after also reviewing his posts on another sidecar forum, and could not remain silent. It's unfortunate and I really didn't want to comment at all, but saw and still see it as necessary, for the sake of his innocent little kids if nothing else!

    Other than rare cases of Divine Intervention, you can't fix dead!

    .
    #19
  20. MILLENNIUM FALCON

    MILLENNIUM FALCON Been here awhile

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    I think these are all valid concerns that were voiced in a respectful and helpful manor. Being a novice hack builder myself....I hope I can swallow my pride and and listen to those that know more than I do. I look at everything as a learning experience. But I also hope and pray that my "learning" doesn't get anyone hurt. I'm sure this Bullet build will turn into an awesome little hack. I cant wait to see where he goes with the build progress.
    #20