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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    Congrats Dave.... glad to hear things are working out good for y'all, it's a good thing when a great paln comes together.

    Good to hear the copper gasket is working out also.

    Map
     
  2. Davezilla

    Davezilla New Member

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    Thanks... yeah, I'll be busy for the next several weeks for sure, and since it's been so long since I've worked in the auto industry I have a lot of classes I need to take so I can get my certs back. Mainly the state inspection cert and I got my son and I set up to go to that class and test on tuesday, then I need to get the AC cert since that's a big money maker here in Texas so I'm also studying that material in whatever free time I have. I still need to interview and hire at least one mechanic who hopefully has those certs as well. Then I spent most of the afternoon on the phone with the bank getting the credit card machines ordered and set up... I've never had to deal with that issue before and thought it would just be a quick phone call, but they ask for Everything when you call them, then they forward you to someone else... who asks you for all that info again... then they email me a whole pile of stuff to sign, scan, and send back

    So far I got about an hour of run time on the gasket I installed and there's no issues at all so it looks like they'll hold up to just about anything... once I come up with an efficient way to cut them on the machine.. lol


    For the copper gasket, I cut 2 of them at 1/8" thick and then I annealed both of them dead soft... one is on my bike and the other is going to your address for you to put thru the ringer as well, then I got a few that were cut out of the .030" thick copper and I sent one along with that head with instructions how to anneal it, and have a few of them left over that I'll just send out to people when i send them stuff. I really need to perfect the cutting process with these since the copper tends to work harden as it's being cut, but I got an idea that might speed things up. I was cutting another 1/8" thick one and it was going good then started to chatter really badly and broke an end mill before I could hit the emergency stop, I checked everything, put in a new end mill thinking the first one was dull, ran the program and as soon as it hit that one spot it broke another one... I ended up getting it cut but had to slow the feed speed down to a crawl. Afterwards I was reading about how copper has a very poor machinability because it work hardens so I'm thinking if I cut out one, then stop and anneal the piece before cutting the next one I can avoid all that, or I'll need to cut the sheet down and cut out one at a time, either way I'll come up with something that works... As I get more time on the machine I'll be looking to make some adapters and brackets etc out of aluminum since the aluminum don't have that type of problem the copper does and the machine can rip thru it like butter.
     
  3. mapbike

    mapbike Active Member

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    Good deal man.... all that sounds like a winner to me..

    Map
     
  4. Cyclin

    Cyclin New Member

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    Awesome! That is a great price. I ended up ordering the Wheel Master Wheel you posted .wee.

    I also ordered the MM Sprocket Adapter w/ 36T Sprocket, a JNM X-Port, and a NGK BPR7HIX Spark Plug, so this weekend I should get some good work done.

    Yesterday I installed the mirror and speedometer, and found this new build is only pushing about 20mph. The engine definitely needs some tuning, it is past break-in and really should be pulling more speed. My old build easily reached over 40mph, even though it was a major "learning" project.
     
  5. Davezilla

    Davezilla New Member

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    I've been working on this on and off in my free time but i got my Girvin/Noleen fork finished and put back together. Got this thing off ebay a few weeks ago and it was pretty easy to tell it was about 20 years old so I took it all the way apart, cleaned everything and re painted the fork legs and all the previously painted parts as well as re lubed all the bushings, then the original polymer that they used as shocks back then I replaced it with a modified go kart shock and a custom wound spring for this fork.
    It's ready to install now and needs to be partially disassembled in order to install it, but this thing is rock solid and weighs less than half what the stock Roadmaster front suspension fork weighs.
    I went with this type suspension since it's a very old design and been proven with superior handeling charicteristics as well as being unique and cool looking. Hopefully I'll be able to install it tomorrow, and it won't be raining so I can test it out.

    [​IMG]

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    #7305 Davezilla, Jun 25, 2014
    Last edited: Jun 25, 2014
  6. Cyclin

    Cyclin New Member

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    Looks great bud :)

    Nice restore too that thing looks brand new!
     
  7. greaser_monkey_87

    greaser_monkey_87 New Member

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    Today I'll be installing a 23t pedal cog on my rear wheel. Currently running a 36t chain ring to an 18t cog, so this will lower my pedal gearing from 2:1 to 1.6:1.
     
  8. Davezilla

    Davezilla New Member

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    And one more stroke of good luck... Right as I was checking my email earlier I get a message from Treatland that they have the dual variated Morini engines in stock again so I did the right thing and bought one... I like these because they have a CVT built into them so it's just twist the grip and go. These engines make about 4.5 to 5hp stock, but there is a 70cc big bore kit available and with the CVT and the right gearing it should make my next project nice and fast, not to mention there's still plenty enough room for improvement as far as compression and port timing and pipe design. These engines usually sell out fast when Treatland has them in stock so grab one if you got the money and want one...

    https://www.treatland.tv/franco-mor...start-eng-p/franco-morini-complete-engine.htm

    First time I saw this engine available I was going to put it in the bike I got now, but I'd rather start with a blank canvas like maybe an older Proflex frame with full suspension or do something similar to the motoped...
     
  9. mapbike

    mapbike Active Member

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    Very nice Dave.... the forks and the Morini score..

    I'd like to have one of thos engines to toy with myself but I better hold off for now, are those NOS..? just wondering since they have point type ignitions.

    Map
     
  10. Davezilla

    Davezilla New Member

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    I'm thinking they're NOS myself since I've only been able to find them on Treatland and when I looked for that engine on other sites it seems to be non existant... I've just been particularly interested in this one because it has the CVT transmission built in so it should have a good combination of acceleration and speed... and let me get away with a more peaky powerband once geared right.
    Now I need to look for the right frame to put it in...
     
  11. survive1990

    survive1990 New Member

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    Just installed this walbro 813 kit from jnmotors runs great for twenty min then dies becuase i have no impulse line fuel drains from carb... but what a MAJOR improvement though!! Any ideas diagrams links pictures i need help thank you for your time
     

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  12. Davezilla

    Davezilla New Member

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    Those type carbs are Very nice because you can fine tune them without taking them apart and it's that fine tunability that's why they run and perform so well. I've seen a few people who drilled and tapped a hole in their case near the transfers to install a niple and run a pulse line which makes these work even better. Somewhere I've heard the JNM wlabro type carbs have been modified so they don't need that pulse line but I'm not sure how that's supposed to work. I know on a lot of chainsaws and other small 2 smokers they sometimes have a spacer plate that channels the pulse line into the manifold to eliminate needing a separate line.
     
  13. greaser_monkey_87

    greaser_monkey_87 New Member

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    Nothing, except gonna ride it back and forth to work tonight. Might even take the long way home. Almost at that point where it's just general maintenance, gas in the tank, change the oil, air in the tires, keep the clutch lubed, that's about it. Ordering new heavier clutch shoes tomorrow and possibly mirrors as well, depending on how much my paycheck is.
     
  14. Greg58

    Greg58 Well-Known Member

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    Theon is a member here that has run carbs that use the impulse line, he posted about it a few weeks ago. He may be able to help you out.
     
  15. Theon

    Theon New Member

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    I've found that these carbs will work without pulse line relying just on head pressure from the tank, but much better to have it though.
    By putting a good dob of grease to catch swath on the inside of the transfer ramp the pulse pick up could be drilled with out splitting the cases.
    But pulse pick up can be taken from inlet manifold also but would not be as strong.
    Also may need a return fuel line from carb to tank?
    These type carbs are generally probably better suited to WOT style riding, I have only yet played with the $15 barrel carb, and like it.
     
  16. tinnes2

    tinnes2 New Member

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    I went to a car show what to look at the cars but nobody would leave me alone long enoughI bet 3 people order motors last night at least one of them is going to need a bar welded and I already saw his bike
     

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  17. Cruise

    Cruise New Member

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    In the depths of winter here. Thinking of joining a motorised canoe forum and changing my everyday vehicle! Maybe a massive wheeled motorised aqua trike like we used to see floating around in the 80's.
     
  18. Cyclin

    Cyclin New Member

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    Today I received my JNM X-port and went to install it, but it would not fit on there stock. Pulled out the workstation attachment for the Dremel and used it to cut a couple mm off 4 of the wings and it was good to go. Trimmed the gaskets on the same setup then adjusted the support bar on the frame for the rear of the expansion chamber.

    Didn't really change much but I did feel a little more torque on the acceleration. Should be good to go when i step down to the 36T sprocket as soon as it arrives next week :)
     
  19. xseler

    xseler Well-Known Member

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    Everything feels right with the world when you can mod a mod!
     
  20. survive1990

    survive1990 New Member

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    i have added a impulse channel to the transfer i can get it to run but it bogs at wide open trottle it seems even with the pulse line the carb gets robbed of fuel you sad i have to add a return fuel line to the tank?? how do i do that when both needles on the carb are in use?
     

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