mopeds


they all work!
December 24, 2011, 6:15 pm
Filed under: repairs | Tags: , , ,

All my bikes that can run are ! Newport still needs a tube and the frev needs the 19t sprocket put on and the chain run, but still, 4 running bikes plus my bros tomos. The frev turned out pretty decent. It runs fine, brake light works, and a 55w headlight! The seat mount isn’t perfect but it looks pretty good. Changes will come later when its all dolled up, but for now I’d like to just ride it. I can’t wait to take it for a spin! Riding chappy around again was a blast, especially after seeing some kids scooting around the hood on a pair of fa50s.





dellorto SHA, dumb; running derbi, awesome

Just before the reno rally I spent a few days trying to get my thrown together derbi variant running. That should have been a relatively simple process figuring that the motor was running fine about a year ago in stock form. This clearly wasn’t the case. I did change a few things, primarily the top end, to a stock jug bored (long ago) to 60cc. I threw on the stock intake and carb and it ran rather well with decent pep and seemingly unlimited top speed. I went to ride it home (as I built it at Matt’s house way back in January) and it made it 1 float bowl in the stupid sha. I pedaled the rest of the way home.

So I tried cleaning the first carb, taking compressed air and carb cleaner to it twice. Same result, it died. So I tried a second 14.12 body with the same result. I asked Tom to borrow one, and this was even worse. It would kinda idle, but when reved it sounded like it was burping like there was a huge leak, but the seals were fine. So I tried cleaning that SHA again today to no avail (and why should anything change, the derbi has a spotless plastic tank).

Pissed off I finally decided to throw on Tom’s custom intake, his first from 3 or 4 years ago, 19mm funneled down to 14mm. My least favorite task on mopeds is running throttle cables, so I just pulled the throttle off ferbi which conveniently was already hooked to my dellorto phbg cap. I didn’t feel like routing the cable through the frame just yet, but I got it all bolted on and of course it fires right up and rides like a dream. It also fits in there super easy! Lesson learned: never use a SHA.

While working I also fixed the wiring which I kludged together back when I built the bike. Everything is much cleaner, the kill switch works as do the lights. So now the bike is almost done. It still needs fine tuning because all my dellorto jets are missing and my randomly picked phbg (84 main, 48 idle, needle ?) only works so well. The variator also needs some fine tuning to fully variate and reach higher RPMs. Despite it all, I think its a pretty cool bike that is fun to ride. With an air box it will keep the neighbors happy as well.


I’ve seen some stuff asking about switching derbi mags between bikes, and because all derbis have very subtle differences, the solution you come up with may be unique. This bike is older (PP) and had spoke wheels. Late bikes, or at least the Variant Sports, have brake hub tabs that are longer (they go lower towards the axle). I switched to a set of lowers from the variant sport so that the tab better held the revo hub, but the wheel couldn’t be properly centered. We then ground the hub down a bit so it all fit together. Fortunately rear wheels are easier as it seems just about all (but of course there are exceptions) have the same size tab for the hub regardless of the swingarm configuration. The biggest issue going to the revo mags is the cables as the ends on the newest variants are different. This is nothing some strong knarps cannot fix.

Finally a note if you are doing this: buy the fork lowers for whatever set of wheels you are switching to. All Derbi variants have the same fork uppers which allow all lowers to be 100% interchangeable. Tom had a spare set of revo mags and conviently forks, so he just swapped the lowers over and avoided ugly half-assed attempts at removing forks and grinding hubs.



whoa what happened
June 23, 2011, 6:15 pm
Filed under: repairs | Tags: , , , ,

I don’t know what happened, but here I am. Back from Reno, living the dream right now. On the topic of reno, it was pretty rad. I liked riding mopeds around and meeting cool peeps, but my pipe mounting bracket decided to snap so I had to rig some fencing to hold it on. After amazing clutch blasting and the broken pipe I decided it was time to change the fluid and switch pipes. Fluid was black, now I have some fresh synthetic 10w-50 in there and its still slipping like a dream, but with the n8p it needs to be geared shorter. Also, its really freaking loud, but the cop I rode by didn’t seem to care.



Check out the custom clutch puller. Also the perfect clutch shoes.


Here are some photos of my trials today. The heat is gone and it’s nice out, so now I can hang out in my shed without dying. I’ve got 2 projects in the works, if one of them actually comes together be ready for the craziest bike ever?

Oh yea, got the G3 running but it needs a choke and some type F. It sure looks pretty though.

Finally, if you haven’t seen Fast 5 yet, GO NOW! Saw it last night and wow, it was way better than I expected; almost as good or maybe just maybe better than tokyo drift. You be the judge.



’tis the season

hello fellow readers, sorry for the lack of updates the past few weeks. Well I am back from Hawaii (1st trip there, so much fun!), and that moped rally in reno is happening this weekend. There should be 6 of us superteens there, so get ready for some crazy fun times.

yesterday we had a little fix-it bbq at my house, and in typical fashion we didn’t get all that much done. Well that’s a lie, Bret got his maxi running after some silly wiring snafu, and Tom got his sweet new variant sport going but it is really really loud and I don’t think my neighbors were all that excited about it.

My green derbi is still being a turd, and after 2 different carburetors and some cleaning I think its time for a 3rd. Hopefully I can get one from Tom tonight, then I can throw that on with the sweet ninja pipe I am borrowing, then it should be able to rip for prolonged periods. When it was running (for exactly 1 float bowl before dying), it was fast. The bored out cylinder, ninja and clutch springs (+TJT) along with a 20t front and super small 32t rear make this bike quick off the line with a predicted top speed over 45 (maybe more downhills!). So yea, I’m excited but not in that its not running now. If I can’t get it dialed I’ll just bring my boring old magnum

Sean is building what may qualify as the ugliest maxi ever. He got an old newport frame out of Matt’s yard (rusty, faded, ugly), is reusing his grungy 5-stars with custom (crusty) white-walled vm100s, some faded old red freespirit forks, some rad bicycle bars, and some random pug shocks. Power wise its solid, with his old athena kit, 21 phbg (he was gonna build an intake, but why do more work when you can just trade parts with Tom?), and a really really chromed out biturbo. All in all practical, ugly, and probably structurally questionable.

Sorry, no photos were taken because we were working super hard, or maybe we were just drinking beer. I’m not sure, but the sausages sure were tasty. See ya’ll in reno.



Poor Minivan
November 29, 2010, 12:00 pm
Filed under: repairs | Tags: , ,

Our beloved 1999 Toyota Sienna minivan suffered a devastating blow 2 fridays ago as my brother drove to work so I could go pick up goodies from tony in Sacramento. Turns out their office had a moving company in to move one of their labs, and of course one of the big moving trucks backed right into it. We had the damage assessed, and of course it will cost more than its worth to fix.

We’ve had this van pretty much since we moved to california, so essentially most my memorable childhood. We would pack in and take it to the skatepark, to the mountains and snow, to school, field trips, etc. It’s hauled furniture between apartments and houses, from dorms to new apartments and back home again. It has transported countless new mopeds from their buyers to our shop, around town, to rallies and races. In 10 years of ownership it has never left us stranded. We cleaned it up real nice one last time for fun. We will miss you old van.


In other news, we brewed a kolsch for christmas, I got the derbi fired up, blasto is 23 (kinda), the snow was amazing on wednesday, and this weekend was amazing.



stupid electrical
February 25, 2009, 5:23 am
Filed under: repairs

so my ignition is being stupid. I’m using the stock stator with a new condenser (also was using an external for extra awesomeness) with good looking points and clean looking wires. 3 come out, red, green and blue. Green is spark, the other 2 are grounded for now (straight to the motor as the original harness was grounded). I’ve tried 3 coils many plugs and what have you. I am getting intermittent spark. It’ll spark right when it begins to turn over, then stop and spark once or twice every now and then then nothing. when it does spark its super fat and jumping a big gap. So what gives?

Possible issues:
-improper point gap
-improper plug gap
-busted coil (in stator)
-short in one of the wires from the stator
-bad condensers
-other

I’m thinking its either a short (which is weird cause the wires are in a harness and not pinched or bad looking (awaiting further inspection) but am leaning more towards a potentially blown coil in the stator.

At this point I should provide some back-story. Maybe 3 months ago I was riding in Santa Cruz and the bike was doing 36 or 37 all day. Then on the way back to maitland’s it started going super fast (45+), then just nearly soft seized, the bike was overheated. Then the bike wouldn’t spark well and did some crazy fire filled backfires. I figured it was a condenser issue and added the external and had just intermittent spark. A few days later no spark.

Ok, if you read all this give me some ideas. I think I have a new coil I could use but will again regap the points/plug and quadruple checks the connections and grounds and again examine for shorts (this has been done 5 times now) and see if that helps. Switching the coil out is the next step.

This is dumb, I want to ride derbi.



Step Back
January 12, 2009, 7:10 am
Filed under: Projects, repairs | Tags: , , , , , , , , ,

So 2 blown magneto seals. This sucks, but turns out you don’t use rtv or sealant on seals. Stupid me, now I get to rebuild 2 e50s. Its not that thats hard, its just annoying making a dumb mistake like that then being down both of my motors. Tom was nice enough to lend me his magnum that we hopped up and its ripping. Currently there are 3 magnums in the shed.

Check the seals, no pinch!

I got 1 of 2 frames I decided I wanted today. First up is the hobbit frame, no need for anything else on there. I’ve got some ideas, we will see how they materialize. Look for those updates coming in 1 big chunk later.

I still want a pinto frame, and would love to get a rigid. I’m not sure if I’m ready to pay what they cost (plus tank), but I might. I’m sick of maxi’s and want something different, and way cooler. An orange swinger would be awesome!

I also painted the magnum frame (finally). I might paint the forks, we’ll see. Something needs to happen with the tank as well, either glossy black or repaint the chalk for ultimate awesomeness. I might even do it flat black but that seems a little lame. Ideas?