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Thread: My newest toy (Dream 50 -> CB125T -> Dream 50)!

  1. #1
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    My newest toy (Dream 50 -> CB125T -> Dream 50)!

    So, I've always wanted an old cafe racer bike and I also needed a learners bike to help me get my sea legs back for the proper motorcycle test. As such, I've been keeping my eye on the Dream 50 for quite some time. Unfortunately, they are indeed pricey. I was waffling between getting this or trading my March in and getting an R31 Skyline. I was leaning very heavily towards the Skyline, but all the offers on trade in value for my March were frankly insulting (I had one place offer to give me 500 bucks for a 40,000 mile, twin charged, piece of rally history!). So I said, this has got to be a sign, decided to keep the March and pulled the trigger on this bad boy! It needs some work as it was indeed the cheapest one I could find for sale. But, I picked it up in Okazaki and rode it all the way back to my place, a 40 minute ride! Biggest problem I had along the way was that my hands went numb!

    Alright, enough gabbing, on with the pictures!



    The pictures are a bit blurry. One of the downsides of buying a bike in the middle of winter is that it's too damn cold to get the bike out for a good photo session.



    I just love that classic look!



    Here's me sitting on it right before I rode it for the first, nervous as hell!





    That was all a little while ago, so on the days that it was above about 5 C outside I started tooling around with it. First goal was to eliminate the air box. The problem with that was the battery. The bike itself doesn't need the battery to run, but it doesn't run very well without it. Also, the tachometer doesn't work without a battery. So, the best way to solve a lack of battery is lots of capacitance!



    That would be 6 50V 4700 uF capacitors connected in parrallel for a total of 28200 uF of capacitance. That's a lot of juice!



    All soldered up!



    I was also planning on dropping the rear fender and dropping in a piece of aluminum for a much cleaner look.



    So I took a piece of cardboard and folded and cut it to the shape I wanted. Then I took some simple measurements and transcribed them a nice piece of aluminum I picked up for 15 bucks at the local hardware store.



    Here's the finished product!



    Not bad looking at all!



    It still ran a little rough and had absolutely no power below about 8,000 rpm, which made launching very difficult. So a carb clean was in order.



    The carb itself is surprisingly simple and straight forward, using a sliding tube connected to a needle for both the throttle valve and fuel jet.



    Here's the throttle valve/needle.



    Here's a look down where the throttle valve slides.



    All apart!



    A close up of the little bitty parts!



    I also swapped in a new iridium plug!



    This completely transformed the bike! Strong, good power from about 6,000 rpm all the way up to 13,500 rpm! Launching is still a bit difficult, but I'll blame that on the fact that the bike was designed for Japanese guys that weigh about 20 kilos less than me! Didn't get any more pictures pictures because it started to rain and hasn't stopped since! As soon as it starts finally warming up and summer rolls in there will be much more happening to this little pocket bike!

    Big things on the list at the moment are to refresh the brakes, new tires an air filter and riding the hell out of it!
    Cheers
    David

  2. #2
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    Re: My newest toy (it's only got two wheels)!

    It's beautiful! Nice work on the clean fender as well. Shouldn't be too hard to get a little more power out of it? My old '81 Kawasaki 100cc was much more driveable after I got a buddy to do a little 2stroke magic on it.

  3. #3
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    Re: My newest toy (it's only got two wheels)!

    Quote Originally Posted by cat0
    It's beautiful! Nice work on the clean fender as well. Shouldn't be too hard to get a little more power out of it? My old '81 Kawasaki 100cc was much more driveable after I got a buddy to do a little 2stroke magic on it.
    Thanks for the comment (and sorry in the huge massive delay in reply, haha). If this were a two-stroke I could probably pull a bit more power out of it with a good carb and a big pipe, but since it's a twin cam four stroke, I'm pretty limited in options without tearing the whole engine apart! Fortunately, there are a few options that I will be exploring!

    I never really followed this up with proper pictures of it in its current state! So, I'm here to remedy just that!

    First up are two pictures I took right after I finished my fender delete.





    These next few pictures are of when I snapped some pictures of it next to my Mitsubishi 360!













    Not a bad looking bike if I do say so myself! The pictures actually make it look a lot better than it is, haha. I just rebuilt the front and rear calipers on it as well as dropped in some new pads and I must say she is a completely different animal now! She stops so much better, it was truly like night and day! The rear caliper was pretty seized and the front pads were almost non existent! Glad to get that sorted. Also, just picked up a new aftermarket C.D.I. and a new, slightly bigger carburetor! So expect some updates on those as soon as they arrive (my goal is to get her up to 15,000 rpm)!

    Cheers
    David

  4. #4
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    Re: My newest toy (it's only got two wheels)!

    Sweet looking bike. Love the simplicity of it.

    BTW, there is a Japanese Nostalgic Bike Garage here. :wink: You might think about reposting there. :tu:

  5. #5
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    Re: My newest toy (it's only got two wheels)!

    Thanks for the comments Toyotageek!
    I realized there was a JNM section after I posted this hereÖ Also, wasnít sure if this classified as a nostalgic as it was manufactured in 1997 (although the CR110 itís based off of is from the 60s). Maybe a moderator would be so kind to move it for me (hint, hint, wink, wink)!

    So I bought some supplies for the garage, got back home, stepped in and in the dark, I noticed something moving. I looked down and this bad boy slithered past my feet and under one of the Bellet seats!



    I canít stand snakes! After I turned into a little girl, and hid on top of my Bellet for a little while, we finally corralled him into a box and set him free in the field across the street. Spiders, cockroaches, rats, anything but snakes and Iím completely blasť, snakes thoughÖ

    With that out of the way, it was time to get down to work! I didnít particularly like my old fender eliminator plate. I cut some cutouts for the brackets and stuff, but if the plate didnít have a curve to it then the cutouts werenít needed. Here you can see the cutouts and the curve of the old plate.



    This was also the first time I have had the tank off, so I figured I would take a picture of what life under that tank was like. Appears to be the CDI, a bit of wiring and thatís about it, haha.



    After much cutting, hammering, bending and sanding this was the plate before I cleaned it up for installation on the bike.



    And here it is cleaned up and installed on the bike! I think it looks much, much better!





    From the side the new plate is almost completely invisible.



    I also figured it was time to pull my capacitor pack out, ditch the circuit board it was on and wrap it in tape so it was more compact and battery like. I wanted to make sure that it was held together strongly with solder and wires first though. So after much soldering, this was the end result. Nice and strong!



    Completely wrapped up in tape with a piece of rubber covering the terminals of the capacitors and mounted in the back of the seat.



    Clearance is tight, but it fits without hitting or rubbing. I think Iíll put a piece of foam on top of the red tab though just to make sure everything is held in place properly.



    I did all the above work because I was waiting on some new parts. Chief among which were these new pipes! A genuine set of Moriwaki performance pipes!



    I also had a PC20 carb on order as well. The extra 5mm of carb size should make a noticeable difference!



    I got excited and went for the carb first. I didnít get a snap, but the outlet of the new carb versus the old carb is completely different. I thought I would have to port the intake manifold (hard to call it a manifold as itís just a short pipe with two flanges) but it turns out that itís designed for a 20 mm carb from the go. The old carb was just choked down and two small for the intake manifold! A simple bolt-on affair from there!



    I then busted out my grinder with wire wheel and stripped all the old paint off the new pipes. Then, after a bit of a sand down, I hung them up and sprayed htem with some 600 C high temp black paint.



    And here they are installed! They look bloody fantastic if you ask me!



    I fired the engine up with the new carb and pipes on and it sound like a completely different animal! It sounds like a 150 cc single! It should be an utter blast to ride!



    Thatís all for now. More to come soon though as I got a new CDI, new turn signals and a new tail light on order that should be showing up any day!

    Thanks again guys!
    Cheers
    David

  6. #6
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    Re: My newest toy (it's only got two wheels)!

    LOL, well see, that shows you how much I know... I thought the bike WAS nostalgic :lol:

    Nice snake by the way :mrgreen:

  7. #7
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    Re: My newest toy (it's only got two wheels)!

    Killer bike, David. My local Honda shop has one of these on display. It's nice to see it get the same loving treatment as your other vehicles. :tu:

  8. #8
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    Re: My newest toy (it's only got two wheels)!

    Completely understandable Toyotageek, everyone thinks it's a proper nostalgic, and when you look at the Honda racing 50s of the 1960s, it's easy to see why! (http://www.elsberg-tuning.dk/honda.html) I wish this one was a 50cc twin though, that would be awesome.

    Thanks camshaft! Unfortunately, the Bellet is giving me dirty stares, haha. It's alright though, I'll be back on it soon! I just need to get my hands a good metal brake, and then I should be able to run with it from there.

    Alrighty, itís about time for another update!

    The CDI and tail light I ordered showed up as well as a few other things, but my turn signals still havenít made it (this would be the first item Iíve gotten on Yahoo Auctions that hasnít been dealt with extremely well). Theyíll get here eventually, so in the meantime, I figured Iíd get to work!

    Hereís the new CDI.



    And my new tail light.



    The reason I was going for a new tail light is that I was still using the old square-ish factory tail light, which was designed to mount o the fender. It looked a little out of place, so I figured it was time to get a proper, small, round one going. This of course required creating a new mount for it. So I bought some stock aluminum and cut and bent three pieces into shape. These all bolt together and then the license plate frame bolts to this, holding the tail light right in position!



    Turned out pretty good looking if you ask me!





    Hereís a shot of the bracket without the seat on.



    I was worried about a light so small being bright enough to see, but as you can see in this picture, it puts out tons of light! I think itís actually brighter than the original light even.



    So, I had my new tail light mounted and ready to rock, had my new carburetor on and I was pretty much all ready for a test ride. Then I remembered that I forgot to put the carb insulator on. So I took the carb back off, honed out the insulator, slapped it all back together, fired the bike up and rolled it outside to warm up while I put my jacket, helmet and gloves on. I head back outside, hop on, give it some throttle and then the whole thing dies before I make it 5 feet. I kick it and it fires up again and then almost immediately dies again. I keep kicking to get it to start, but the damn thing wonít run. So, dejected, I wheel it back inside and start to diagnose.

    Pulled the carb off, everything was hooked up fine and looked okay, so I put it back on and tried to get it to start again and sometimes it would run and sometimes it wouldnít. The whole thing was sounding worse and worse. So, Iím thinking itís the new CDI I put on, so I pull that out but nothing changes. Iím racking my brain and going crazy until finally I decide to put the original carb back on and see if that solves the problem. Miraculously, it does! So, now that I know itís a problem with the new carb I pick it up to look at it and hear a clinking sound coming from the inside. So I crack the carb open for the first time and the main jet and emulsion tube have fallen out. Thatís right, fallen out. So, I put them back in, tighten them down and try to put the carb back on and the threads on the carb for installation strip out, both sides. I almost threw the Taiwanese piece of junk across the room.

    I went upstairs and ordered a proper, Honda original, PC20 carburetor off of Yahoo Auctions. Genuine Honda/Keihin stuff.



    The build quality is completely different. This carburetor moves smoother, sounds better and is generally just of great quality. Lesson learned, when buying carbs, go with genuine stuff. Here she is installed on the bike!



    Since I was putting the bike back together, I decided to re-install my CDI. Interestingly, the CDI isnít a replacement CDI, itís just a piggy back unit. Itís supposed to change ignition maps, increase the strength of the spark and eliminate the rev limiter. Donít know how effectively it does all that, but it most definitely lets me rev to 14k now instead of having the whole thing stop the fun at 13,500. Here you can see the CDI unit ziptied to the frame (zipties are the preferred method of installation since the CDI unit comes supplied with two for installation!).



    So, I pulled the bike out for her first test ride since I went crazy with all this stuff.







    The bike ran terrible, haha. Then I thought about it and of course it did, the carb is meant for a 125 probably, so the main jet size is probably mega rich for a 50. So, out came the carb and the tuning process began! The main jet installed at factory on the new carb was a #95 and the original carb had a #75. I worked my way down to a #78 and it ran just a little lean, so I jumped back up to a #80 and the bike seems to be running pretty awesome! I still need to do some fine tuning with the needle clip, but I rode the bike for about an hour yesterday without a hitch!





    Not bad looking for a fifty!





    Unfortunately, rainy season reared its ugly head this morning, so I wonít get a chance to ride it again for a while.





    I still got a few more things to knock out and then Iíll be pretty happy with it! Most notably, the big ungainly turn signals are going to get replaced with much slimmer ones, if the slimmer ones ever get here (2 weeks for shipping is a little ridiculousÖ). Also, I picked up some front springs that slide over the front forks to stiffen up the front a bit (Honda original part). I also grabbed some Honda original rear shocks and springs from a CB250RS for cheap. Iím going to disassemble them and double check the spring rate before they go on though.

    Thanks everyone for the comments!
    Cheers
    David

  9. #9
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    Re: My newest toy (it's only got two wheels)!

    very cool bike!

  10. #10
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    Re: My newest toy (it's only got two wheels)!

    Alright, I suppose I should update this!
    This post is going to cover like 3 months of tooling around with this thing, but here goes!

    First things first, I received these in the mail... from Taiwan. They're pretty cheap plastic pieces, but they were just the right size.



    Here's the front's on.



    You can see they tuck up really close to the headlight, exactly what I wanted!



    Here's the rears on.



    Then I got my hands on an HRC lightweight flywheel and slapped that on, which made a decent difference! Unfortunately I didn't snap an after shot, but I did get a before shot of the rusty piece that got replaced.



    Then, for a little stronger spark I got a Kitaco coil and NGK plug boot (this also got rid of that ugly yellow piece that was the original piece).



    Here's the coil installed.



    I just made a short little L bracket to hold it in place bolted to the factory mounting tab.



    Then my girlfriend took a seat on a Honda Solo. I still retain that this is one of the coolest looking bikes out there. Unfortunately, it make the rider look completely ridiculous. Although she looks pretty good on it, maybe I should convince her to get one, haha.



    Shortly after, my friend from work picked up a Dream 50 as well. These pictures are from the day we got back to my place!











    And naturally anything that gets left in my garage gets worked on, so here's how it sits now!



    This is my next project, but that's still under progress, so more on this later.



    Just last week it was my birthday and so my girlfriend made this cake for me. She actually hand drew the Dream in chocolate! She did an absolutely amazing job! Notice the Moriwaki pipes, no rear fender and my custom rear tail light. She did awesome!



    My other present was a proper Dream 50 model kit! Not a bad birthday at all!



    That's it for now!

    Cheers
    David

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