My minimoto

Hey everyone, great to see this new section for these cool little bikes. Here's mine. I'm in the process of fitting a different exhaust and trying to change it to a 6/64 gearing instead of the 17/54 it runs stock (goes through a 3:1 reduction from the motor first). Should be fun if I can get it to go fast enough, I've bored and ported the carb and might fit a 4 petal reed kit one day but first I have to cut the swingarm pivot so I have room to move the carby back. It has suspension both ends which makes it nice to ride off road, though I'm not game to jump it as I would probably snap the frame

nice is that a cag engine with cvt ?? and are those 2 piece rims

How fast does it go?

what did you pay for it? i wana get a minidirtbike

did you add those decals? and also, when folded up does the kickstand extend past the rear wheel? im gonna buy one of bikes soon

No, its a standard aircooled Cag motor with a duplex primary chain reduction of 3:1 inside that thing that looks like a CVT (see attached photo). It runs final gearing of 17/54 which even with the reduction is still a bit high. I'm trying to see if I can get rid of the transmission and just run a stock 6/64 gearing.

I haven't fitted a speedo to it yet, but I'd say I've had it up to about 30kph. Damn thing is geared so high that I keep running out of space to test it. I was thinking of taking it on the road in this industrial estate where I was riding it, but the screws holding the muffler on vibrated loose and the muffler nearly fell off so I didnt get a chance. If you had enough space so the motor could really rev out, I think it would go surprisingly fast. It's a genuine 49cc motor (has a 44mm bore) and I've bored and ported the carb and veloctiy stack so it goes pretty good.

I paid $352 including shipping from eBay.

The stripes and stuff are actually part of the plastic. The plastic is white and it's been painted black with the stripes and stuff left unpainted. Still looks neat though. When the kickstand is up, it only protudes a little bit past the rear axle, it doesn't hang out the back of the bike at all.

did you change the front forks??? they don'T look like the originals???

and how did you mod the pipe to fit the dirt bike?

They are the forks mine came with. I have seen the same bike on eBay but with slightly different forks, I guess it depends on which of the 8 billion Chinese pocketbike manufacturers was making it.

Cut and weld, there is no other way.

are the front shocks oil shock??? gas shocks or only springs???

I'm 99.99% sure they're spring only. On the weekend I took it off road a bit and somewhere there (I don't know where) the silver "bolt" in the top of one of the forks popped out. They're only a cap made up to look like a bolt. There may even only be a spring in one fork leg too. I've considered putting Pee wee 50 forks on as they're fairly cheap but I doubt I'll bother, I think I'll just stick to smoother areas from no on!

Nice bike, I just ordered same one off ebay. couple questions if you wouldnt mind answering, how well do you fit on the bike, how tall are you and how much do you weigh? and is a decent bike for the price? I mean you cant expect too much for the price, but the accel,speed,brakes are decent?

I'm roughly 6'1" and about 190lbs and I fit on the bike fine. I was getting my knees stuck under the bars a bit on really slow turns but I angled the bars forward more and that solved the problem. For the price they are ok, I paid about $350 Australian, but that was a fair while ago now, they've dropped and mostly in the US around $190 seems to be the go.

They accelerate pretty good for a 50cc bike with 85kgs of weight on it If you know what you're doing they can easily be tweaked to go better. Like any Chinese bike you will probably have to tune it properly right out of the box (well that's how they were when I bought mine, they might have improved quality control but I'd be surprised). The brakes are fine too, bit of flex in the levers, but you get what you pay for.

thank you kind sir. Got any more pics?

im planning these mods if you have any information that would be great.

-Port match exhaust and intake,
-add a tach and maybe a speedo
-a light, is it possible to run the light off of an alternator or sometype?
-maybe change the tires to a more motocross looking tread.
oh and definately loc tite all the bolts, and make sure the tank is clean, and paint the fairing black.

No worries. Sorry, no more pics at this stage. I haven't touched it for months, been busy with other projects, though I did strip it the other day and go over some of the welds around the headstem and I beefed up the welds for the shock mounts because I'm probably going to ditch the shock and go rigid due to the chain adjustment varying wildly depending on the amount the shock (which is a bit of a joke BTW) is compressed. I also painted the frame and swingarm satin black, it looks pretty nice

For sure you should definietly match the velocity stack to the carby. Actually what I did was bore the carby and black plastic manifold out, ground a big bellmouth on the carby and bored the veloctiy stack to match. There is a detailed article on this site under Chinese Pocketbike FAQ or something like that, it tells you all you need to know. For the exhaust, the port is ok as is (can be improved, but I don't know if I'd bother) but look up the CAG exhaust modification on this site for how to chop bits out of a stock cag exhaust (like the one I patched onto my bike) as those are better than the exhaust my bike came with originally.

For a tacho I dunno, the only options I've seen were too dear so I never bothered. Speedo is easy and I added one to my bike, just get the cheapest bicycle speedo you can find, program it up for the wheel diameter and stick a magnet on the disc rotor. I got my bike up to 50kph, for real 50kph as the bicycle speedo is 100 times more accurate than those dodgey Chinese pocketbike speedos.

Since it's a magneto ignition there's not really anywhere to tap in for lighting, and anyway, direct lighting sucks bad. Every time you idle the lights dissapear. If you really want lights, I'd go a cheap battery operated bicycle halogen headlight.

For tyres you might be screwed, I dunno. The knobby ones that came with my bike say 12" on the sidewall but they're wrong! I bought some 90/65-8" grooved tyres that fit perfect. I don't know what other mini dirt bikes take 8" tyres, you might have to ask your bike shop.

Funnily enough after reading the Chinese air cooled pocketbikes FAQ on this site I did the same as that's what they advise, but there was nothing in my tank and all the bolts were ok too. I didn't bother loctiting them and none have fallen out though my exhaust bolts came loose a few times due to crappy spring washers. The main thing was the needle position was set too high so it ran rich. I dropped it a notch or two and it was sweet.

thank you for the info.

www.planetminis.com has a ton of info about minidirt ballers....... imo

u got the front mudguard wrong.. lol