mopeds


custom

nick made tri-tip ($2 a pound vs. $4 for ground beef), and we made another pie. The berries were a bit more ripe, and I made more crust so I wouldn’t have to crappily weave it. Jon Kho added more sugar and we rounded it off with some vanilla ice cream. 10000x better than the last one.


Tony liked it a lot so he liked everyone’s plate cream as well as the tin.

Next I decided I wanted to build a new bike (never mind all my broken bikes and far-off projects). It’s Freespirit mixed with the beautiful c5/laguna tank. The freespirit seat pan fits the lines of the tank beautifully, so time to get custom. Lower the seat, put on a bar, build holders and weld it all up. Mockup with wood is best.

I didn’t know what size shocks were in stock, so each potential length was marked. 370s in stock, so less custom work required.

Sean did a good job welding it. Not 100% pro-status, but certainly better than I could do. Its not going anywhere. Some more mods in store, as well as a motor build, pipe mod, fork swap, wheels fixing and probably other stuff I’m forgetting right now. It’ll be done by the end of the weekend.


Motor is gonna be a bit boring. 65 hero kit, 19 phbg, selettra, 75cc derbi zen all on my kickstart e50. I want to ktm clutch it eventually and put a better cylinder on. It should be a torque monster.

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Derbi CDI installation step-by-step
June 11, 2009, 3:58 am
Filed under: Uncategorized | Tags: , , , , ,

So derbi owners have pretty much always only had one ignition choice: stock (points or for some the electronic ignition found on the ds50). Now I’m going to show how the CDI treats sells can be adapted to fit your derbi. This is going to be for piston port bikes, but the same procedure will work for pyramid reeds, and should work for flat reed as well, just ignore the coil flip.

Buy CDI here

Ok, so you got your CDI which has a new stator, flywheel, cdi box/coil and maybe a regulator. This was on my race bike, so I pulled the lighting coil just to clean up the wiring a tad. Your going to need a dremmel or files to slightly modify the stator, a m4 tap and appropriate sized drill bit, and maybe some lock-tight.

The first obvious complication is mounting the stator in place of the old one. You’ll notice the diameter is a tad smaller, and you want it centered as well as possible for the best pickup to be sent to the box. So you are going to have to slightly enlarge the center hole (towards the lighting coil). Next you need to enlarge one of the screw holes so you can use two screws to hold the stator to your cases. I ended up using 2 screws, one just to the right side of the main ignition coil, and the one right above the lighting coil (see photo). The one above the lighting coil needs to be enlarged about 5mm to the left. You may need to pull the lighting coil off to mount the stator to your cases, but you can just re-install it once mounted.

Basically the lower screw is tightened and the plate shifted as far counterclockwise as you can get, so just enlarge the hole above the lighting coil so you can rotate the stator to that position and screw in the bolt. This position (with the pickup relocated) got me right at 1.8 mm btdc)

So now the stator is lined up, but the case is getting in the way of you wires out of the stator. You need to dremmel open the little supports for the crank bearings/seals (see photo). I believe you will only need to open up 2, the one just above the lower screw hole, and the one to the left of it.

With those done, the stator will just bolt on with the cables out of the way. You will still need to relocate the pickup (tap and locktight) and possible flip your ignition coil. I am running a za50 cdi box (counterclockwise spin), and had to flip my coil (note the position of the blue wire from the coil to see which direction). If you have an e50 box, I don’t think you will need to flip it, but always check with a timing light to make sure it sparks through the range.

So thats it, just a little modifications and this wonderful and cheap cdi works, and quite well at that. It really brought my bike to life, and is a nice departure from points. Now your only issue is figuring out where to mount the cdi box and coil. Also note, on one of our 5 piston port derbis, the cases were super weird with extra large supports for the crank bearings, thus not allowing the flywheel to fit inside. You could likely dremmel everything out, but I’d be careful.



upjetting is for losers
March 2, 2009, 7:38 am
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I still haven’t tuned my shit (wind, rain and other obligations), but I decided to get a 24 oko for derbi. I got a bigger intake from benji (24.3mm inner diameter), and the oko and all the jets and stuff. Everything fit right up except the throttle cable, so now I need a new one, and am waiting on that. After riding 3 race bikes (mine, creature jimmy’s and tom’s), I feel like I’m doing well. My bike performed similarly to Jimmy’s decked out peugeot, but both pale in comparison to tom’s derbi. I think the bigger carb and actually tuning the carb and ignition should get mine to pull as hard as his. Front wheel lift is unavoidable if you dump the throttle through turns! Oh yea, new TJT belt seems to have removed any/all variator lag, so now it won’t be scary to ride anymore. I should have it running tuesday or so, basically as soon as the new cable comes. Race practice was cancelled today due to rain. We are hoping to get some track time this week.

Some new parts for the flat reed motor came as well, so I’m getting excited. Benji is the parts master. I sent him a wishlist, and the next day, seemingly reading my mind, what I wanted arrived in treatland. I want a derbi rear wheel for herbi because the 5 star hub may cause some issues with sprocket alignment and tabs have to be added to the swingarm. I’ll update if I get anymore parts or make any progress.

Also, I got my magnum back up and running. I needed a moped running last night, so I’m using my brown frame, ups tank and other goodies, 2 speed polini and more. Its pretty quick now, very fun!



running
February 27, 2009, 9:36 pm
Filed under: Projects | Tags: , , , , ,

yea, it runs now. so sweeet! My decomp cable snapped, so starting its a little awkward, but it runs pretty decent. I need to double check the timing, get rid of a little exhaust leak, and dial in the jetting, but already it pulls to high speeds and has pretty sweet acceleration. I’m currently utilizing bungee mount technology for the pipe. I also need a new belt.

so stoked! Race practice on sunday!