14 replies to this topic

[minidan]

Hi everyone,

does anyone on here have knowledge on mini dirt bikes? i just bought a second hand one and was wondering what i can do to tune it up a bit.
i was also wondering if anyones knows what are the best parts to buy and where to get them from?

any help would be greatly receieved!

[Timify]

I had a few Thumpstars and x-sports... used to race them on the Mallory track for mini's

Most people start by loosing the battery and electric starter, new zorst will help a little too.

[minidan]

I had a few Thumpstars and x-sports... used to race them on the Mallory track for mini's

Most people start by loosing the battery and electric starter, new zorst will help a little too.

this ones just a normal 50cc with a pullstart, no battery any idea where to buy good parts from?

[Timify]

sorry not for the 50's... Mine where 120cc 4 strokers.

[-scott-]

I had a few Thumpstars and x-sports... used to race them on the Mallory track for mini's

Most people start by loosing the battery and electric starter, new zorst will help a little too.

this ones just a normal 50cc with a pullstart, no battery any idea where to buy good parts from?

dont waste your money, it will break. They are cheap chineese things and last like 5 mins. If you want a mini dirt bike get like a 125cc 4 stroke one, like xsport or a thumpstar. They are good fun and break a lot less often.

[minidan]

Dont just generalise all bikes in one sentance. And they are not all Chinese. It depends how you maintain and ride it.

If you dont have anything useful to say i suggest you dont post anything.

[luiji89]

perhaps something like new fuel filters, spark plug, airfilter etc may help?

[mighty mini jack]

They use the same engines as mini-moto's, gopeds and the such but i'm not too sure you can do much to improve the performance!

I'll have a dig around, see what i can find out and let you know.

[-scott-]

Dont just generalise all bikes in one sentance. And they are not all Chinese. It depends how you maintain and ride it.

If you dont have anything useful to say i suggest you dont post anything.

Well i am speaking from experience, spent years messing around with these things, and unless it is a Blata one, which i doubt it is because he doesnt say it is, it will break and it is chinese. They are just made from crap materials thats why they are so cheap.

I can garentee it will be one the same as this.




i am just trying to help him so he doesn't waste his money because i have been there and wasted money. So i would appreciate it if you dont tell me when i can and cant post.

[minidan]

Look Scott, you can post in here, i didn't say you can't. I would just find it a lot more useful if your advice doesnt sound so 1 sided. Its like me saying 'Don't buy a VW Beetle it will break, they're crap!' having owned just one. its not helpful

My bike doesnt look anything like that bike you posted up. the only bits that i think are the same are the engine and kickstand and maybe the wheels, but not the tyres. The frame is entirely different.
Im sorry you seem to have bought a dodgy bike in the past that lasted 'like 5 mins' but i am a competent engineer and mechanic with a whole workshop of tools to hand so if anything looks like its going to break i'll get it sorted. Besides it depends how you treat the bikes and how you ride them. Im not doing jumps or anything like this and it just ridden on smooth ground. just a bit of a laugh at work with my mate who has a Husqavana 50cc mini dirt bike. (not chinese)

I know how to get more power out of the engine im going to fit a modified cylinder head next week and do some other bits too.

what i really wanted to know was decent places to buy parts from and any tips from people who own/ride these things.

Edited by minidan, 26 June 2010 - 09:12 AM.

[davidv]

Nice picture above.I did buy a Chinese 50cc small plastic Scooter Cheap, a road use bike with Plate and did some work on it for hobby.Twist and Go 28MPH.It was good never used it sold it mate.Finding parts is hard.
Most These Type of Bikes to gain a bit more power Buy a New Race full exhaust System a New Carb and Air Filter .Some will Take Jetting up.If it is Auto Lube for oil you can remove it all and mix fuel in tank that gives a bit more.
If you Know what you are doing you can also file the ports in the head.

[minidan]

Nice picture above.I did buy a Chinese 50cc small plastic Scooter Cheap, a road use bike with Plate and did some work on it for hobby.Twist and Go 28MPH.It was good never used it sold it mate.Finding parts is hard.
Most These Type of Bikes to gain a bit more power Buy a New Race full exhaust System a New Carb and Air Filter .Some will Take Jetting up.If it is Auto Lube for oil you can remove it all and mix fuel in tank that gives a bit more.
If you Know what you are doing you can also file the ports in the head.

yea i have a modified head already i just need to fit it.
what carb would you recommend?

cheers

[davidv]

I can not help on the Carb. I would look on the Web to match the original with a Modified one.Some will not take new Jets due to a tight design thats a shame .The Exhaust is the best one you can set them Rich to a Point for more Fuel in .
When i was a young man at 16 my Dad bought me a brand New Yamaha RD 50 cc Sports road bike a 1978 Restricted Bike for my Birthday Gift and also the fact i had found my first Job to get there on at a Car Garage Scrap Yard.20 Miles there and back at 27 MPH on a 60 MPH Road i could fall asleep on the straight bits.Good old Days?.
A young local lad tried to sell me a great Micro Bike it was a Kwaka Green Full Race Replica very fast on the path.I had to say NO.It would have looked great in my home as a Show Model.To old to risk a go on it.

[rob#155]

Any piccies of your bike, or at least the engine?
I used to race Mini moto's (polini engined DM) however i did own 3 chinese ones for a laugh and tuned them up, I used racing reeds, air filters, ported the engine , swapped the carb, boost bottle, and racing exhaust. it'll never be as good as a polini, but I still had good fun messing with it.
The reason i did this was cause the class my DM was in was very tight with the rules on modifications.
Anyway, lets see some piccies and I'll see what i can find that may be of use to you.

[davidv]

Yes pictures on you Subject would be great we all love pictures on Members Hobbys it helps on the Chat.
When i was Young with my best Friend we had to use old Bikes One was a 50cc very small Classic Vespa for Park Runs it was Tiny but i could swash on the back.Then he turned up on a tatty 250cc Lamb. in the snow we enjoyed loads of GOBITS on that before it passed away.The next bargain he found us to enjoy was a very old Honda XL 250cc for the Cannel runs.The good old Days the Ps could not catch us on there BMWS.WE carried on for years Playing when we moved to aYamaha YZ 465 Full Race Srambler No Road Tickets Lights,Speedo,Plastic tank,Off Road full Nobs Tyres Etc. got caught after a couple of months and changed Hobby to Minis.They took the bike and said a lot.I did say we thought about a No. Plate to make FUPIG but thought it was a crime so best you no us both with are V sign by hand signals