what did you do to your motorized bicycle today?

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

  1. DRBS

    DRBS New Member

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    i use the duplicolor metalcast paints and there regular engine paints all the time there great paints for these engines try the universal chrome they have its the BEST CHROME PAINT I HAVE EVER USED also try the clear effex paint its a prysmatic paint that will turn you paint job into a rainbow paint job and ive been painting for a loooong time i use to paint hot rods for the autorama here in detroit check out www.scarryfnlarrys.com
     
  2. Panhead

    Panhead New Member

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    My Skyhawk frame is now a (barely) functioning ride. Tires, tubes, & front wheel arrived the past couple of days. I created a rim strip from an old tube, got everything mounted, replaced the rear axle with one that gives me some room, & dug through parts until I found a seat post, chain, and a unmatched set of pedals.
    I've almost forgotten what it's like to use a coaster brake! Definitely some refining to be done, but the bicycle is here. Pretty soon it will be time to begin on the motor-bicycle.
     
  3. Panhead

    Panhead New Member

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    Pretty creative - worth remembering.
     
  4. fatdaddy

    fatdaddy New Member

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    I found out the hard way that the factory will use mismatched parts. If they got the wrong cylinder or a piston rod too long they'll just add gaskets to keep the piston from hitting the head. ALL they care about is getting yer money out of your account. EVERYTHING ELSE is YOUR problem. And yeah, ya gotta inspect everything.
    Red.usflg
     
  5. xseler

    xseler Well-Known Member

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    Only changed the name of my ride --- sorry, Shan.....

    [​IMG]
     
  6. Davezilla

    Davezilla New Member

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    Replaced throttle and clutch cables on customer's bike and readjusted clutch, added a few more coats of grabber green to the specialized frame's front triangle, then I will redo the rear triangle in semi flat black, I've also stripped the original yellow paint off the rear spring so I can powder coat it lime green.
    Got the presta valve adapters in the mail today so I could put air in the fixie's tires, and hopefully this weekend I can have an engine installed in that one so I can have something to ride while I'm redoing the mountain bike.
     
  7. knightscape

    knightscape Member

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    Xseler, can you tell me about the direction your head is facing? I thought slant heads were supposed to have the plug facing forward for some reason? I don't know it if matters and I realized I don't have any idea why I thought that. Does it not actually make any difference?
     
  8. Greg58

    Greg58 Well-Known Member

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    You can run the head either way, I found on one of my engines that it runs better with the spark plug to the rear. I don't know if the head mates the cylinder better or what the difference is but I can tell it.
     
  9. fatdaddy

    fatdaddy New Member

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    I've done it both ways. It doesn't seem to make a difference. I did it usually because of the CDI and where I wanted it mounted. To keep the plug wire off the head. But performance wise I could tell no difference at all.
    fatdaddy.usflg
     
  10. Panhead

    Panhead New Member

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    The project is now a ride-able bicycle. Now awaiting motor mount. . .
     

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  11. knightscape

    knightscape Member

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    Took a sanity ride after work today. Bout 12 miles to my folks' and back. Gorgeous summer evening here in Maine. Just what the doctor ordered after a nutball week. First long ride since jetting and intake mods. Defintely added mid range power. I think I'll try up another size on the jet and see what happens.

    [​IMG]
     
  12. Davezilla

    Davezilla New Member

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    that's a really nice looking bike you got there...
    All I've done today so far was air up the tires on the road bike and flip the rear wheel around so it runs off the freewheel side, but I'm still at the shop so I'm getting ready to put a rear sprocket on the fixie side of the hub and hopefully get an engine together and installed before I run out of steam for the night...
     
  13. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    Nothing....just plain old nothing. Nothing needed doing as usual. Plug-n-play is the way I like to roll ;)
     
  14. Legwon

    Legwon New Member

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    tightened up some bolts, installed a new muffler ;)
    will have to be modding it though... not what i was expecting :s
     
  15. xseler

    xseler Well-Known Member

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    I've ran it both ways. However, I've got a theory --- the bike runs slightly faster this way because of less air resistance.



    :D xct2
     
  16. Panhead

    Panhead New Member

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    The John Deere paint scheme is cool. I think I need to hike my jet size, too. Thank goodness I ordered a carb that came with an entire box of different sized jets! Kind of like playing Jeopardy, one day I'll hear >ding< and Alex Trebeck will smile and say, "Panhead, you're today's winner!" dance1
     
  17. Davezilla

    Davezilla New Member

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    Tonight I actually made some decent progress with the road bike project... first I had to decide how I was going to install the rear sprocket so I decided to open up the center hole just enough to fit the flange of the fixie cog in thru the hole then made sure everything was centered up, clamped the 2 together then welded the 44 tooth sprocket onto the fixie cog. Problem solved, no rag joint, no adapters, perfect chain alignment, no complaints here...

    I was just going to do that and go home but decided to choose an engine for the bike, temp installed the super rat then decided to go with a Dax engine instead. Grabbed a brand new Dax bottom end from the stock room, got a cylinder I previously ported, did a quick hone job to get the right cross hatch pattern, and put a piston on with the rings removed, trial fit the cylinder and the piston was protruding by about 1.5mm... I definitely didn't want to stack head gaskets so I grabbed the degree wheel and some copper base gaskets as well as a .040" thick spacer.
    Stacked the gaskets and spacers until I got a 0.6mm squish clearance using a .025" thick copper head gasket, then checked the port timing to see if I needed to cut any more on the jug or not. After setting up the degree wheel I ended up with 164 degrees of exhaust duration, 122 degrees of intake and 132 degrees on the transfers so no piston ramping or cutting of the skirt will be needed or done.
    I still need to take the top end back off to put the rings on the piston and then do a final assembly. The pipe of choice for this one will be a kx65 pipe since it fits really well with minimal modification and should hit where I want it to for a good combination of acceleration and top speed. For the carb I'm leaning more toward the mikuni vm18 for this engine since it's still fairly easy to tune and I want this bike to be not only fast but able to get up to speed quickly as well.
    here's a pic of the progress I've got so far... this frame makes it a lot easier to work the engine without having to take it out of the frame so I've been able to set up the port timing and squish clearance, the head is temp installed so I could see what it's going to look like and to protect the internals until I can finish everything else I'm doing to it...

    [​IMG]
     
  18. Tony01

    Tony01 Active Member

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    It's running good! Like scotto said plug n play... Changing the oil..

    Davezilla that should be a screamer... Watch out for those road bumps laff
     
  19. Davezilla

    Davezilla New Member

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    Yup... this one's gonna scream but after a short ride in the parking lot I'm already looking at a shock absorbing seat post, cloud 9 seat, and shock absorbing stem for it... this one does ride just a bit rougher than my other bikes but luckily I got lots of smooth pavement to ride on
     
  20. DRBS

    DRBS New Member

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    i took my cylinder off today and added the third transfer port boy did that add some more power!!!!! now i can really notice the reed valve working no more burb burb out of the carb my air cleaner is dry and it feels better at mid to high range cant wait to build my own expansion chamber next weed getting some .035" sheet metal and going to use my pressure washer to expand it out should be pretty good for a home built expansion chamber ill post pics of the finished exhaust when im done with it
     

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