Kimjon

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Everything posted by Kimjon

  1. Had some time on my hands today, so I wasted it on doing something pointless. New tank for velobike: Not bad. Best use for one of those disposable gas cylinders...no use for welding as they only last 5 minutes! Only made that mistake twice
  2. Would love to see some pics please. I have some reed valves off another two stroke, when time allows I will have a go at milling something up for this motor.
  3. Here's another one of mine. This is a fast goped...but not as fast as the one in this build thread. In the quick and nasty YouTube clip, I'm only about half throttle as there isn't enough room to flog it. My latest one bogs at low speed, so it's pointless riding that one unless you have more room to hit the higher rpm's. Anyway, thought it would give you an idea?
  4. Just dumping a few of my projects from the last year on here. Most come under the category "pointless yet fun"... A mate I work with (civil engineer, genius who designs bridges) showed me this YouTube clip: https://m.youtube.com/watch?v=MFzDaBzBlL0 I couldn't help myself, so with a little bit of tinkering in the shed...3hrs later I whipped this bad boy up. I left it wrapped in gift wrap with a giant bow on his desk...he was blown away, which made me very happy. Yes, it is impossible to ride. Yes, guaranteed to make a total cock out of yourself, and yes pointless yet fun It got noticed and found its way onto TV3, which was cool. http://www.newshub.co.nz/home/new-zealand/2016/03/riding-a-backwards-bike-should-be-easy-right.html Our next mission is to leave it in public places in the hope some shit bag tries to steel it...we'll be over the road in a pub watching the big fail - should be priceless! Kj
  5. Does about 50kph....maybe more? but it gets there super quick! Its direct drive, no clutch. So once started, you've gotta keep moving. It doesn't like you dumping gas into it from uber low revs, but if you bring it up to a running speed then flog it...you'll pull wheelies!
  6. At high school there was kid who had an"American pie" moment with a Swedish exchange student...poor guy saw out his days at high school with the nickname "2-stroke"... sorry funny story that always comes to mind if someone says "2-stroke". Anyway, I've always had an affinity for 2 strokes. My parents weren't rich, so my love affair with these engines wasn't realised until I had an income of my own. My first purchase was a MX bike. A 125cc then moved on to 250cc of craziness! Then a 12A rotary RX7... technically a "2-stroke". Cheap speed, fun times! And although I'm more into my V8's now, I'm not afraid to admit the odd rotary catches my attention, and makes me smile. Next was a Kt100 gokart. You'd wonder how a 100cc engine could produce so much power...actually I still do wonder how - absolutely incredible! Then came gopeds. I have 5 goped sports, all in various extremes from near stock to insanity! This is my dream build...this bad boy will be nuttier than squirrel shit! I just finished the motor today, its a hybrid...I won't bore you with details, but lets just say it will be fast:) The expansion chamber is a work of art! Anyway, the above is the result of the dangers of the internet and a paypal account;)... let this be a warning! Oh and while my wife and three kids are away on school holidays...hell yes this gives me the right to build a gas engine on the kitchen table! Started off as an already high spec little engine at 22.5cc. The cylinder head had 4 transfer ports...these have been port mapped and ever so slightly ported to change the port timing a tiny bit. The head has been replaced with a hemispherical dome head specially calculated to the right volume to run on 95 octane gas/oil mix. The new cc rating is now 28.9cc due to larger bore of new top end. The flywheel has been lightened. The timing has been advanced. Massive dominator tuned expansion chamber. Huge walbro carburetor. Velocity stack. K&N filter. 0.7" drive spindle. Third bearing support added. Chrome fan cover and pull start. Yes...lost the plot...but everyone needs a hobby eh. You'll have to use your imagination a little at this stage. But this pile of "parts" will be made into a goped roller...the motor will go on it. Will be badass! The frame I picked up didn't quite live up to the trademe description...but beggars can't be choosers. These aren't that easy to come across in NZ. So rather than dwell on negatives, I welded up the broken bits, and stress fractures. Next came a trial fit, a few extra holes were needed. And with the magic of a mig welder and a grinder...a few holes disappeared! I've got to figure out forks and some form of head set arrangement to hold it in place. Handle bars will then be the next headache. But I like a project and an idea (cheap idea) will come to mine:) Frame all finished. Found more stress cracks, drilled holes in the ends of the cracks (old trick, logic being that a crack will stop at a hole) then ground out a v into the crack and welded it all back again. Finally ground the welds back flush and you'd never know any different. I took it all back to bear metal, and dropped it off at local car painters for a coat of etch primer and some 2 pak paint. I looked at other options briefly...then thought paint is as good as anything else, and secondly it is just a big kids scooter after all, not a show car. I milled up this plate up. The rear fender was snapped of the frame, I could have replaced it like for like...but I had this idea in my head for something a little different. I think I will look the part once final assembly takes place. Started the motor for the first time today. It roared into life with relative ease. I soon realised it was starving for air, so tore it down again looking for reasons why. Didn't take long to see why, the velocity stack had an internal diameter of 15.4mm, but the carb internal diameter is 19mm! I bored out the inside, then while it was dialed true in the lathe, thought I'd contour the shape to aid flow. Pretty happy with how it turned out. Okay, things are happening fast with this one. Here's a before pic of what I was dealing with: And after: Chrome "bothy" forks DDM Racing third bearing support My milled aluminum rear fender: Tank, with billet DDM cap all installed with my own lathe turned aluminium spacers. That's it for now. I've ordered a few parts off ebay that I'm waiting on to complete this project with. I'm going to machine/weld up the handle bars this week while waiting on ebay parts to arrive. I'm pretty happy with the silver...I've been known to say unkind words about silver in the past...basically it does suck as a paint colour, but for this project I think it compliments the chrome nicely without being overly tacky? I'm going to put some blue parts in the mix too break it up a little... all will be explained later.:D Had a cool idea for a kickstand. The originals had a large two sided loop. Hard to explain, but irrelevant as I didn't have one anyway. So I welded this up: And lean it to the right and it automatically "springs" up under tension. The spring holds it out of the way...pretty trick! It's the devil in the detail:) MKII model: I had to make it clear the part where the deck bolts on, as I forgot about the rubber isolator. Looks a bit more shapely now with a few more curves:D[/QUOTE]
  7. One to start smaller hole usually has a 4mm bit left in it, other does the bigger holes... just kidding :-). I first brought a little one as it was all i could afford at the time...bigger one came later. Weird, but both do get used.
  8. Bunnings. $70 from memory, comes in white only...red paint fixes white
  9. There are a few things in life that are never big enough...ummm yeah, well that too... But other than wishing I was hung like Dirk Digler, a mobile workbench was pretty high up on the list. Something to store tools in, be able to roll around, and assemble stuff on top of. But at around $4000 to buy one, it only left two options for someone like me...make one, or go without. So I'm making one: Collection of 3 draw filing cabinets. I cut about 60mm off the total height of each one. It would have been way to high otherwise. Some were also 4 draws, this didn't matter as I just cut them down to match the size of the others. Next was to mig weld all 5 cabinets together. I stich welded them around the edges. Then made up an angle iron base that it will sit in. 8 caster wheels were added to support the weight. Yes this is epic over engineering...but they are cheap, so I don't see any negatives in this. And paint time... Mounted on roller chassis. It wheels beautifully! All the casters are the type with brakes, so it can also be locked if you don't want it to move. Draws painted And assembled....Boom!!!! Pretty happy with it for the money. Basic cost breakdown: Filing cabinets off Trademe total $70 Caters x8 total $106 Steel $50 Paint $77 Grand total $303 Not bad considering the cost of anything remotely similar is $3000 - $4000. My brother makes kitchens, so the top is on order from his scrap pile. So it will be a freebie for me. But it's still very usable as it for now:-) Kj
  10. Poo brown metallic at this stage...but may change my mind?
  11. Frame is an ultima product and welds are all tig welded.This gives a good base to build off, but enough room to tweak proportions to put your own style on it. I used a 4" over front end, to compensate I balanced the rear with a 17" wheel as weirdly this gave a higher overall diameter compared to other available choices in that width tyre due to aspect ratio. The taller than normal rear wheel lifts the rear up to level its stance (close enough). Kj
  12. Go on...only good things can come out of it
  13. Te Miro school, where it's remote enough to escape the PC curse that is taking fun away from kids "since ages ago". That project was done with minimal tools (okay I did use a lathe, but i could have done without). The welder i used was an old arc welder worth about $150, it even handled the thin pipe on the roll bar by basically doing a start/stop technique. I do have a mig... but I like to use the old arc welder whenever I can.
  14. Photobucket sucks balls. Can't be bothered updating the pictures, and without them this thread seams pointless. So revised; long story short I've made a hardtail harley motorcycle. Started with nothing, now looks like this!
  15. Deleted all my old posts as photobucket wants to extort me and the posts make no sense without the photos.
  16. Hey, yeah guilty of recycling. But this forum maybe the better place for such things eh?
  17. A few spills and frills later, we entered the local schools Trolley Derby. Where she got 2nd place in her age bracket. Don't worry, the other girl was fine. There were plenty of crashes...but no one was hurt. Its so cool that a school allows such things to go ahead in this crazy risk averse world. Kj
  18. Deleted photobucket pictures, as they (photobucket) suck balls.
  19. I wasn't happy with my first attempt at making a drift trike...so I made version 2.0 There's well over 30hrs put into making this bad boy. I started with a kids drift trike, and there really isn't that much of it left untouched. I won't bore you with a step by step...but there were many. Its a tad underpowered, but in saying that...its got enough to get you into trouble Crazy fun for something so simple! Kj
  20. First post on here, so more testing how this works? Picked up Pete's velo bike. It has appeal, as I'm very much a 2-stroke fan. I've made similar projects myself in the past...and hopefully I can get this bad boy going again? Mocked up for inspiration, will get onto in as time allows. Kj