what did you do to your motorized bicycle today?

Discussion in 'Motorized Bicycle General Discussion' started by Skarrd, Oct 25, 2010.

  1. mapbike

    mapbike Active Member

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    small town Texas is a whole nother world for selling things like this, I know I could sell a couple bikes probably, and I will in the future, but this is a small town area 20,000 population and loads of people here ride motorcycles.
     
    #8021 mapbike, Apr 12, 2015
    Last edited: Apr 12, 2015
  2. Davezilla

    Davezilla New Member

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    Got a few things done today... First off I got my customer's bike done and started for the first time, like usual, the first start on a new engine took some effort but afterwards it was starting easier and easier, I just did a few heat cycles on the engine by starting the engine and reving it to keep it frfom sitting at one rpm, did this for about 15 minutes and shut it down once it reached about 300 degrees at the head. second start I did the same thing but rode it around in my parking lot until the engine got nice and hot then let it cool down. Tomorrow I'll check everything out and re tighten anything that may have worked loose as well as readjust the chain but otherwise this one's just about ready to give back.

    Went to work mine some and ported out another new jug close to the same as the old one but with much wider exhaust port and intake port, I also knife edged both sides of the transfers on this one as well as opening up the transfer tunnels a lot wider. I still need to split the cases and match the transfers to the jug since originally I never bothered to do this... this engine was supposed to be a temporary fix until I could get my other engine done up right and the crank trued and balanced, but the Dax engine proved to be superior and the old engine is just for mock up builds now.
    Once the porting was done I put the jug on the engine that's still in the frame and started to take measurements when I noticed something not so right about my frame's lower tube... Took the engine all the way out to investigate and saw the frame had a nice sized crack under the mount so with this bike having such a tight frame it makes it hard as **** to work on I decided to cut out the damage to weld in some fresh metal when I got the idea just to cut the bottom tube all the way out and put in a new tube that's smaller diameter but with thicker wall thickness... the original frame tubing was a LOT thinner than I thought... like 16 gauge exhaust tubing... Anyway, I got a new tube bent and ready to notch then I'll have to run and refill my argon bottle tomorrow and I'll weld in the new bottom tube along with some serious gusset work to make sure this frame is up to the task of going 40+ on a daily basis.

    For my other build... I didn't get my OCC stingray frame this weekend so I couldn't do much there except clean up the wheels and re grease the bearings etc... I may also re lace the rear wheel with thicker spokes even tho I'm planning on using a Manic type rear hub adapter instead of the rag joint, those 14 gauge spokes just look really thin on that big fat wheel..
     
  3. Davezilla

    Davezilla New Member

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    Here's a little frame carnage to show just how thin those Roadmaster MTB frames really are... I noticed a crack starting and decided to weld it up with my mig and blew a hole thru it... This told me that the metal was a lot thinner than I expected so I cut out the damage so I can weld in some fresh metal, but after seeing how thin it was I decided to go ahead and weld in a whole new bottom tube with a bend in just the right spot so I'll actually have some engine clearance on this thing...

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  4. boxcar

    boxcar New Member

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    Oh I duno..... maybe drain the tank and the carb before you stuff the bike in the trunk of a car....
    The remark wasn't pointed in your direction.
    It was in the direction of the guy , the trunk and the rain filled fuel tank......
     
  5. mapbike

    mapbike Active Member

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    Ouch... Dave yeah they changed those Roadmaster MTBs when theyquit making them in the USA, I have an older one that is a brute, heavies5 bike I have, I think its proba ly an old American made Murray, heavy tubing and all but just came with Caliper type brakes and its a 10 speed, it was my first build and still a solid old bike, just needs a fresh better balanced engine to be a good comfortable rider.

    Great idea on putting a new heavier wall tube in, that should do the trick.
     
  6. DRBS

    DRBS New Member

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    lol you guys are the vest!!!!!!!!!!!! I know that there are a ton of better stories on customers bikes any one want to start a new thread saying customer blunders go ahead and lets see what comes up LOL
     
  7. Panhead

    Panhead New Member

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    A close-up of the absolutely great angled manifold by FFV8 being used on my 4 cycle engine with an NT carburetor. This set-up works so much nicer than the stock carb I'm actually making plans on what to do next.
     

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  8. Panhead

    Panhead New Member

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    A rear wheel shot showing my new adapter & 44t sprocket from Kings. The 1" adapter fit a hub measuring .988" perfectly, and I believe could have taken something even a bit smaller. Beautiful piece, especially compared to the stamped-out kit part.
     

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  9. Davezilla

    Davezilla New Member

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    I really like that manifold... Excellent job by FFV8... I'll probably need to fab up one like that to get my Mikuni carb to fit in my bike's tiny frame...
     
  10. Panhead

    Panhead New Member

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    Brad, the man that constructs these manifolds does a great job, plus he sent a set of gaskets & all the fasteners I needed to do the job. Everything fit very well, & the NT carb I installed rather reminds me of what I once had on my Yamaha trail bike 40 years ago.
    A big plus has been that so far I haven't had the needle jam as it did on the stock carburetor, which leaked more gas onto the ground then it ever sent through the engine.
     

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  11. Panhead

    Panhead New Member

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    As long as I'm on here I recall someone asking what was being done about blow-by when using a 2 stroke carb on a 4 stoke engine. Here's a photo of what I thought was a temporary solution - a section of clear yellow fuel line shoved into the air cleaner & leading to the hose on the engine. This seems to work so well I might make it permanent with a dab of silicone.
     

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  12. bluegoatwoods

    bluegoatwoods Active Member

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    I made a rain/Sun/weather cover for the duffel bag that rides on my rear cargo rack.

    DSCN0449.JPG

    Now I'll just leave it on there most of the time. Rather than carrying stuff I'll need everyday, I'll just carry the stuff that I want handy but do not need often.
    Rain gear, batteries for my tail lights, stuff like that.

    The everyday stuff will go in the two backpacks that mount up front and I'll carry them in and out everyday.

    That cheap tarp material isn't all that Sun resistant. But if I Armor-All it regularly then it ought to be as waterproof as I need it to be for, say, a year maybe. That'll be good enough.

    The only question left is whether or not I'll get tired of lugging that big old thing around. But I'm lashing the duffel on and off that bike everyday as it is.

    And I've always maintained that, for me anyway, two-wheeled transport must have cargo capacity. Otherwise I'll be back driving my car half the time. It means some inconvenience. But it's worth it.
     
  13. Panhead

    Panhead New Member

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    After looking at my photos, I snugged down the adapter on the rear hub, then went around doing a general tighten & inspection. Then, I went for a ride - around the 'hood a couple of times, then took it out on the main drag here in my section of town while we still had daylight. Adding the angled manifold so I could ditch the stock carb & swapping that stamped wheel sprocket has made this into a whole 'nother machine, and that is largely thanks to ideas I picked up right on this site.
    .wee.
     
  14. mapbike

    mapbike Active Member

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    ride safe and enjoy, glad everything is working out good for you on the bike.
     
  15. Davezilla

    Davezilla New Member

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    Got my frame and forks for my newest project in today... finally... I think I had enough time today to get these out of the box before I got slammed with work today... but I need as much work as I can get in order to fund this project quicker... lol..

    Anyway, I'm gonna take my time on this one and make sure everything is just the way I want it before moving to the next step in the process... I got a GT5 Super Rat engine in the buildup process for this frame that I'm working the port timing and squish clearance out on as I get time to mess with it... which for the most part is just on the weekends or if I have a really slow day at the shop...

    Here's how it all starts...

    [​IMG]

    get a good look at it because it's not gonna look like this next time ya see a picture of it... hopefully...

    [​IMG]

    [​IMG]
     
  16. mapbike

    mapbike Active Member

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    Ill sure be watching Dave, best wishes on the chopper build.
     
  17. allen standley

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    installed Turbobuick tensioner with Mapbike Custom Roller. Real Sweet! Thanks you guys for quality American Made products.
     
  18. mapbike

    mapbike Active Member

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    Excellent, post a pic for us visual folks if you get a chance.
     
  19. allen standley

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  20. jazz2561

    jazz2561 New Member

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    moved one step closer to finishing my steampunk btr
     

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