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| monkeymanjaso... |
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 monkeymanjaso... Borekit Bruiser
Joined: 04 Mar 2011 Karma :     
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| Nope. |
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 Nope. World Chat Champion

Joined: 17 Feb 2011 Karma :   
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 Posted: 17:35 - 17 Jul 2011 Post subject: |
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Well, thats one of the most incomprehensible things i've ever had the pain of reading.
What you have is a Moped. By law it is restricted to 28 MPH. Assuming that you have a full motorcycle licence you CAN remove the restrictors but you would have to re-register it as a motorcycle and possibly submit it for testing at a VOSA center.
Assuming that you dont care about that particular part of the law (Not many people do) you can derestrict it by removing a washer in the variator. HOWEVER, dont expect it to do more then about 35. Its a 20 year old moped, not a speed machine. That engine will NEVER get it to do 50 let alone 60-70 (Well, it might if you spent a lot of money and time tuning it but you would wreck it very quickly). You would have to change the engine to get it to do any sort of decent speed and then your talking a lot of work just to get it to fit. If you were to get it fitted and riding straight then your trying to get a machine designed to do 28mph to go more then 50, this means that the wheels are too small, the tyres are underrated, the breaks aren't good enough and a few other things. This makes for a pretty dangerous machine that I certainly wouldn't want to be riding.
For the work that it would need to get it there its not worth the money or the time. Flog it and buy a two stroke 125 if you want to do that sort of speed. ____________________ Former: Derbi GP1 50, Sachs XTC 125, Suzuki GSXR 400 GK73A, Kawasaki ZX7R, Suzuki DR250, Yamaha RD350
Current: 2011 Yamaha XT660Z Ténéré, 2003 Yamaha YZR-R1 5PW (In Build), 2009 Kawasaki ZZR1400 |
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| Martay |
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 Martay World Chat Champion
Joined: 20 May 2009 Karma :     
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 Posted: 17:48 - 17 Jul 2011 Post subject: |
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I have a City Express which is a simmilar thing from similar era. As far as i remember, they are not restricted, just slow. Live with it or get a bigger bike! ____________________ Eat well, poo hard
Drives: Cavalier 2.0 16v
Rides: Slightly ratted Honda City Express  |
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| monkeymanjaso... |
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 monkeymanjaso... Borekit Bruiser
Joined: 04 Mar 2011 Karma :     
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| Nope. |
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 Nope. World Chat Champion

Joined: 17 Feb 2011 Karma :   
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 Posted: 18:26 - 17 Jul 2011 Post subject: |
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| monkeymanjason wrote: | hi, i am a professional welder. so fitting a new engine doesnt bother me with new fitting mounts, and when i said 60/70 mph i meant with a new engine in it...I have a full bike licence i was thinking of putting a dio engine in it..!! Its a 1980 its 30 years old, by the time i have finished with it it will be a speed machine just getting a few pointers, If i cant get hold of a dio engine because they are all abroad when you look on the net then im just gpoing to mount a pit bike engine in it and do all the swing arm,,, It be a little hobby to do, just be funny making a bike that small go that fast iv got a r6 and a robin reliant with a gsxr 750 engine in it and my normal car im doing it just for fun...Thanks for everyones help so far..Jay |
Right, first things first. PLEASE START USING PUNCTUATION. Its rather difficult to read your posts without it.
As I said, if your really intent on fitting a bigger engine your going to have to up rate a few things:
Tyres
Nuts and bolts
Strengthen the frame
Wheel bearings
Fork internals
Suspension
Breaks
You will need to put support bars and struts throughout the frame and across the step through part in order to strengthen it up.
Of course, if you put a bigger engine in it, you have to re-register it and get it into the right tax class. This will probably mean submitting it to VOSA for testing and probably putting it through an IVA (£450).
If you chose to go through with it, good luck and I hope you dont die. But the last guy I know to put a big engine (600cc) in a 50 (Derbi Senda) Died going around a corner on his 4th ride. Small bikes aren't made to take big engines and I really dont see the point.
Good luck anyway. ____________________ Former: Derbi GP1 50, Sachs XTC 125, Suzuki GSXR 400 GK73A, Kawasaki ZX7R, Suzuki DR250, Yamaha RD350
Current: 2011 Yamaha XT660Z Ténéré, 2003 Yamaha YZR-R1 5PW (In Build), 2009 Kawasaki ZZR1400 |
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| unitynotsocri... |
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 unitynotsocri... Banned

Joined: 29 Jun 2011 Karma :     
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 Posted: 19:13 - 17 Jul 2011 Post subject: |
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If your that mad for it and a welder to boot ,you could have a good look at chinese scooter/moped engines.They can be bought new for a few hundred quid with carb n accesories up to about 150cc.just watch the forks and brakes though if you intend to go above 40moh plus. ____________________ nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS |
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| monkeymanjaso... |
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 monkeymanjaso... Borekit Bruiser
Joined: 04 Mar 2011 Karma :     
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| Johnser |
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 Johnser Renault 5 Driver
Joined: 19 May 2011 Karma :     
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| monkeymanjaso... |
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 monkeymanjaso... Borekit Bruiser
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Old Thread Alert!
The last post was made 15 years, 86 days ago. Instead of replying here, would creating a new thread be more useful? |
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