De-restict Qingqi QM50QT-6A (REX RS450)

[qingqi]

Hi, I looked everywhere but could not find a video guide for de-restricting a QM50QT-6A Chinese scooter, there's only some info for the similar, but newer model - the '9' - and I'm not sure it'll work for mine. Also, do I really have to mess with the CDI, the fuel needle thingy and the air intake?

I saw few videos showing similar looking scooters, but I was not sure if it's the same machine so I didn't want to experiment. My scooter is branded as REX RS450 (I'm in Germany), but in its registration documents it's written Jinan Qingqi QM50QT-6A. Here's how it looks:



Thanks in advance, greets from Berlin and pls excuse my poor English.

[inuyasha]

Hi
Welcome aboard
Pleased to meet you
Nice looking scoot, are you sure shes restricted? What top speed can you achieve with her now?
If she can go over 50 kph shes most likely not restricted
Take care and ride safely
Yours Hank

[Deleted]

Its a pretty generic bike with lots of different names but they are all considered a 'Sunny QT-3'

How much faster you are going to go depends on how much money you have to spend.
No 1 thing you can do to it is gonna make it fly..its several changes that are all related to each other that will make it faster.

[qingqi]

Apr 15, 2012 13:15:16 GMT -5 inuyasha said:

Hi
Welcome aboard
Pleased to meet you
Nice looking scoot, are you sure shes restricted? What top speed can you achieve with her now?
If she can hit 50 kph shes most likely not restricted
Take care and ride safely
Yours Hank

Apr 15, 2012 13:15:47 GMT -5 stroker said:

Its a pretty generic bike with lots of different names but they are all considered a 'Sunny QT-3'
How much faster you are going to go depends on how much money you have to spend.
No 1 thing you can do to it is gonna make it fly..its several changes that are all related to each other that will make it faster.

Thanks for the nice words and for the warm welcome guys! I bought it few days ago for only 250EUR, it's 6 years old (2006) and it is restricted to only 45 kph (28 mph) as required by law here, I already tested it few times. Unfortunately some car drivers get very aggressive while driving behind me and I would love it if I could make it run just some 10 to 15 kph (6 to 10 mph) faster. I read some forums stating that the very same model goes without a problem to 70-75 kph (43 - 46 mph) without the restriction, but there was no explanation or a tutorial. I think the same engine is also used in the Peugeot V-Clic, but not sure.

[inuyasha]

Hi
Your most welcome
Most are restricted with a spacer/ washer in the variator so it doesn't open all the way, a restriction plate in the exhaust system, and on some a rev limited cdi
This video shows a basic setup and how to remove restrictions on a genuine scoot , but the same principles apply to most scoots
vimeo.com/2575002
Hope this is of help
Take care and ride safely
Yours Hank

[qingqi]

Apr 15, 2012 13:38:59 GMT -5 inuyasha said:

Hi
Your most welcome
Most are restricted with a spacer/ washer in the variator so it doesn't open all the way, a restriction plate in the exhaust system, and on some a rev limited cdi
This video shows a basic setup and how to remove restrictions on a genuine scoot , but the same principles apply to most scoots
vimeo.com/2575002
Hope this is of help
Take care and ride safely
Yours Hank

Thanks, I'll watch it carefully. Do you think I can achieve +6 mph by only removing the spacer and not deal with the exhaust plate?

[skuttadawg]

A larger main jet can deliver a dip more of gas , unrestricted exhaust will have more flow , lighter roller weights will help . Remove yours and weigh them to see what you have and try 2 or 3 grams less . A NGK irdium will fire better than the other spark plugs . A BBK will have more power to play with