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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    This might help but then agian.....?

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    This can easily happen even when all available options have been used

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  2. mapbike

    mapbike Active Member

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    Worked on the Green machine bike build yesterday, still have a couple things to work out on it to get it where it needs to be, but its coming along good so far.

    Had a strange thing happen to me on it yesterday though, first I found out the a standard NGK B6HS spark plug will not work with this type cylinder head when the cylinder deck has been shaved down to allow piston to reach optimal TDC.

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    Luckily I had a good Champion J8C laying around which worked out to be the perfect reach plug for my set up.

    second thing that went sour was that the CDI and the mag coil went out after the second short ride, first time since 2009 I have had either of these two parts go bad on me, First I thought maybe it was just the CDI, I had an extra so I replaced it and still no fire, so I hooked the other CDi back up and pulled a mag off of one of my old broke down BGF engines, cleaned it up good and installed it, still no spark.... so I got the other new CDI and hooked it up again and bingo she busted right off and is running great.

    I had kill switch hooked up Red wire to blue and Black wire to Black right where mag and CDi hook together, this was done with good sealed type crimp on spade connectors, engine was running fine, I pulled up out front of house hit kill switch, went in house for a few minutes to let it cool down some, then took off for another ride and she wouldn't hit a lick, so it seems that the last time I hit kill switch to shut it off is when they both fried.

    Normally I always hook one wire from the kill switch to the Blue wire from CDI and the other to enginess rear mounting bolt as ground, never had an issue with it hooked up that way but the one and first time I hooked both kill switch wires to both of the CDI/Mag wires it knocked both of them out the second or third time I ran the bike..??????

    Didn't imagine that would have caused an issue, but I wont do that again..LOL!

    So, the engine is running great, best running engine I have had yet with a stock exhaust pipe on it, it does lack a little grunt power down low, but on the flat this engine really scoots even pulling the 41T rear sprocket I went with on this build, I'll have to check to know for sure with my GPS later but i think I'm getting upper 30's with this GT5 wtha stock exhaust that has been match ported to head as good as possible, a standard NT carb with jet drilled with #71 bit, the pedal Chopper type head, jug deck shaved to give .025" squish clearance between piston and heads small squish band and the 41T sprocket, it also has a "Fred Piston" that has small ramps machined in at the transfers and the skirt has been trimmed on the intake port side to allow the port to be open at TDC.

    low vibes all the way through revs and the higher it revs the smoother it gets, this is the first GT5 long rod 38mm stroke engine I have had and I have to say that so far I'm really liking the way it runs, I think this engine will really come alive with a good free flowing exhaust taht will let it breathe like it needs to.

    I'm thinking I will either keep this bike now or put a different engine on it and keep this GT5 for one of my other bikes, I was trying to set this bike up to be a good runner at 25-30mph and that is why I put the 41T sprocket on the rear and installed the stock kit type exhaust, yeah i did some other mods to help it out and hopefully make it a bit more reliable, but I didn't expect that it would possibly be a 40mph bike even with the stock muffler and a 41T sprocket...lol!

    I'm not gonna sell a 40mph china girl build to someone, if they wont to mod it up for that they can, but I'm not gonna sell one that way.

    I'm thinking my old Huffy may end up being the bike for sale since it runs great in the 32-34mph range as max speed and is a very comfortably cruiser at 28-30mph.

    in the 20's &30's F here today and I have to work the next two days so my bike work is on hold until warmer weather allows.

    Happy safe riding all and those of you who may be a bit on the fence about the GT% geometry engines, I can tell you based on this one that I have just got going that it has real potential and is way smoother than I had expected it to be, I pleasantly pleased so far with how its acting.

    Map
     
  3. GoreWound

    GoreWound New Member

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    Took my bike for a ride today, and I'm pretty sure we are through the break in!
    [​IMG]
     
  4. Intrepid Wheelwoman

    Intrepid Wheelwoman New Member

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    How big was your smile :)
     
  5. GoreWound

    GoreWound New Member

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    Ear to ear, with road salt thrown in my teeth!
    I felt it right as I passed a group of kids throwing fist pumps into the air at me.
     
  6. Davezilla

    Davezilla New Member

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    Yup... that's when the fun starts... after it's fully broken in and time to decide whether to ride it as is or start tuning on it to get it set up just the way you want whether that means screamin fast or nice quiet and comfortable...

    I had a guy actually come by my shop today while I was doing an alignment for another customer so I came up out of the pit to see what the guy needed and he just asked me if he could take a closer look at my bike because he saw me riding it earlier in the morning and saw me pull into the shop etc... Come to find out the guy also has one but it's not working so he was asking me if I could fix his. I told him to just bring it by whenever and I can look at it and that I probably got enough spare parts in my stock room to fix just about any issues his bike may have. he also informed me that he has a lot of spare parts at his house like tanks and a few other parts so I think I'm gonna try and talk a deal for some of his spare parts in trade to get his bike up and running for him. From what he was telling me it sounds like he toasted his mag coil and I got a few spares at the shop already, but he was also saying something about he may have overheated it so I may have to give up my last stock piston to get his going, but I do need to order more goodies anyway.
     
  7. Semaj

    Semaj Electric Enthusiast

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    so thats the sign? when your motor breaks in Groups of children start fist pumping at you?
    You guys may have just swayed me to get a Gas motor for the experience of it...
     
  8. fatdaddy

    fatdaddy New Member

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    laughing so hard I almost pee'd myself. A theif would take one look and just keep walking. Some things just aint worth it. laff
    fatdaddy.usflg
     
  9. mapbike

    mapbike Active Member

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    something about the gas bikes that really get peoples attention, its similar to EC cars and trucks.

    I have three intro powered vehicles that people go nuts over when I pull them out and go blasting off and up to about 50-60 mph blue smoke from the burning Castor oil jetting from the exhaust.

    Pull out even a nice quality battery power EC vehicle and they see it as more of a toy rather than something awesome like the loud smoking screaming Intro powered vehicle.

    Actually the higher end electric rc vehicles will out perform the Intro poweredin speed and quickness, but the whizzing sound of the battery power trucks doesnt do it for people like the intro powered ones do.

    Yep you need you a well built good running 2 smoker build.....
     
  10. Trey

    Trey $50 Cruiser

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    Well, since I'm so used to riding past gas stations, I ran it out of gas!
    Pedaled on back and spent a whopping $1.40 to go another 100+ miles.
     
  11. boxcar

    boxcar New Member

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    I to went for a ride. 60 deg's and wonderful.
    I love global warming....
     
  12. Davezilla

    Davezilla New Member

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    Didn't do anyting to mine today, but showing it off at the shop has got me a new customer... not to fix his cars, but to fix his bike :D The guy who visited the shop the other day came back today and dropped off his bike for me to get running. I hadn't tried to start it yet, but he was telling me it has no fire. I got a spare mag coil over here but his CDI is also cracked, and it looks like somebody took a sledge hammer to his exhaust pipe. The engine is a 49cc of unknown origin and it's totally stock from what I saw. It does look like it's been stored outside and could have been rained on so I'm going to have to educate him a little on keeping certain areas dry, but I'll also seal up the new mag coil really well too... Now let's just hope the cylinder and piston are still in good shape...
     
  13. Rudz

    Rudz New Member

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    Used water weld on my old 4L tank, let's see if it seals up the leak so I can use it again.
     
  14. GoreWound

    GoreWound New Member

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    (for the record this happened yesterday)
    I went out for a ride and had my first run in with the law!
    he gave me the ol' whoop whoop so I pulled over.
    "what've you got goin' on here?" he asks.
    "A moped sir" I say.
    after walking halfway around the bike looking it over "hm, a moped, so it is"
    then after looking at the front end for a seconds he adds "is this a, er, an, umm... it's a chopper then?"
    "oh ho, yeah" I reply.

    overall I think he just wanted to double check what drove past him, he had a few more questions about it which I was happy to answer (China, Schwinn, around 2 maybe 3 HP)
    he seemed oddly satisfied with my answer of "I do not know" when he asked how fast it was (told him about how the rear sprocket can affect that, showed him my 48 tooth and said that some people get them doing 40 with a thirty tooth)
    he took a good look at my entrenching tool, I told him it's the coolest looking counterweight I could find. (I think he mostly just wanted to check if it was safely stowed/ was not meant for self-defense)

    he told me it needs lights if I wanna take it on the main roads, and to wear my helmet (I have one but it won't fit over my hat so while it's so damn cold I've been going without [I know, I'm stupid])
    I let him know that I plan to try and get my exhaust quieter, he said that was a good idea. I let him know I live near where he pulled me over (gave the vague general direction)

    as he let me go he said to be careful driving it with snow on the ground, he seemed slightly incredulous about needing to say it. and told me to keep the pedals on it so it stays legal, I thanked him and let him know the bike wouldn't work without the pedals.


    all-in-all I am really happy the local PD are not mad at me.
    in conclusion: politeness goes a long way with the police.
     
  15. mapbike

    mapbike Active Member

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    yep always best to be nice and helpful, never come across as rude aand acting like a jerk, make them feel good about it and point out the things you've done to improve safety.

    Best to never act defensive as if your doing something wrong, just be nice and act like you're being very responsible for your own safety and also for all the others who are on the road.

    Tell the officer about this forum and tell him if he wanted to build himself one that you'd be more than happy to lethim know where you got you engine and parts to help him out, talk primarily about how it gets good fuel economy and not much about how fast it will go, main thing is I think its a good idea to avt as if it so enjoyable to ride that you wish the offi er had one also.

    Good job GoreWound, sounds like you handled that very good and glad he was nice to you about it.
     
  16. GoreWound

    GoreWound New Member

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    Thanks, I too am glad he was nice.

    I was a little worried before now about being pulled over by a cop who hated fun. I like finding out I was worried about nothing.

    The police around here drive new-ish Impalas, and this one was an unmarked car.
    It's a good thing I hand signal all the time, I didn't even realize it was a cop car until the Whoop.

    He made a slightly impressed sound of acknowledgement when I told him that I am just riding around near my house to break in the motor as I finish up the build with lights and a speedometer and stuff.

    also he seemed to have a good grasp of how to deal with mopeds in general once he saw it was one. as of now I can assume that the local PD has had at least one meeting on what to do with mopeds and that would appear to be make sure it has pedals, if not it needs a plate. also general safety checklist.
    dance1

    shouldn't be too long before I start posting the fulfillment of that checklist...
     
  17. fatdaddy

    fatdaddy New Member

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    As per CVC 5030, Motorized bicycles do require a "SPECIAL PLATE"In california. DMV does not consider this a regular registration, SO, there is a code that says registration is not required for motorized bicycles, And a regular registration is not required, BUT a "SPECIAL PLATE" IS required. Yeah, it can get confusing. But, heres the law in California.
    http://www.dmv.ca.gov/portal/dmv/detail/pubs/vctop/vc/d3/c1/a8.1/5030
    Of course I'm assuming MB laws are pretty close to the same all over. Most places that are OK with MB's kinda tend to make the same laws. I suggest you go to YOUR DMV website and do a search on Motorized Bicycle. I bet yer gonna find a lot of stuff the Cops dont even know about

    Yer also required to have a M-1 or M-2 license here. Good thing the cops dont really know the laws, because I've NEVER had a bike license of any kind.
    Most times I was pulled over the cop just wanted to check out the cool bike. Once in a while ya get a idiot cop that wants to just find a reason to give you a ticket. Headlight, tail light AND brake light, mirrors AND dont get caught doing over 30mph and you'll be fine. I made a cop turn purple one day trying to give me a ticket. He finally gave up and walked off muttering to himself. I wished him a pleasant day, which seemed to make him even madder for some reason.LOL Sometimes ya gotta be the teacher, Even with cops, Just do it with a smile and be polite.
    fatdaddy.
     
    #7777 fatdaddy, Feb 19, 2015
    Last edited: Feb 19, 2015
  18. Trey

    Trey $50 Cruiser

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    Gore, like Map said, it sounds like you handled it well. Gotta do it. Like fatdaddy said, you need to be informed on the law. Gotta do it. ;)
    I've never been pulled over, but I live in a relatively small place. I do on occasion walk up to any law enforcement agent I see, introduce myself, ask their opinion on MABs, and give them a card for this website. (Hello if you're here!)
     
  19. xseler

    xseler Well-Known Member

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    No excitement here ---- just replaced a front brake cable that had slightly frayed where it clamped to the caliper. I didn't know until the other day that you could just buy the inner cable......the mechanic at the best bike shop in town clued me in. I was actually there to look at a Felt 1909 to see if it would be a suitable platform for my 'new' old Briggs motor. Opening looked a little too small for this particular motor. I did spy a Schwinn that would probably work.
     
  20. Davezilla

    Davezilla New Member

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    Sounds like you handled your encounter with the law the right way and told him the right answers etc... I dunno what the laws are like where you're at, but over here we can ride them without too many restrictions... The few times I've seen a cop when I was riding they either just smiled and waved or gave me a thumbs up, which was really cool.
    I've only talked face to face to 2 others who have these and they both said they get about the same response, usually they just wave or act like you're just another bicycle.

    For me, again, way too busy to do anything with my bike today and the guy who dropped his off for me to fix came by the shop to give me the rest of his parts stash to see if it'll help get his back on the road. The other engine he has is another 49cc but the jug is severely scratched up inside and so is the side of the piston like something broke off and got trapped between the jug and piston so I won't be using anything off that engine, but it might have a better mag coil and the exhaust pipe is in a LOT better shape so I'll modify it by opening it up and drilling more holes thru the end cap, or I might just cut out a bigger hole and weld in a fresh outlet that's twice as big as stock, just to keep it stock looking.
    I'm probably gonna need to put a new CDI on it but I'll test his first, and I got one of those Rocket cdi's stashed away somewhere too, I may just put it in something better looking than an old pill bottle and use it on his.
    I mainly want his to run really good when I give it back to him but I may buy another KTM pipe and make him one similar to mine since he keeps telling me how much he likes mine... either way, it'll be nice when I give it back for sure.
     

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