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Post by cunning on Nov 25, 2005 14:39:26 GMT
Hello! Having just had my moped stolen, I have invested in a new retro Boatian scooter. I have read with interest the comments about de-restricting/improving performance and just wanted to get some clarification as to what constitutes de-restricting and what doesn’t. Where is the line drawn? I realise that tampering with the carb and/or unplugging the pink wire may be dodgy if I’ve only got a moped licence (although if unplugging the pink wire in isolation only gives a small improvement in performance is o.k?), but what about changing the rollers? Can anyone give me a bit if guidance as to what I can do ‘legally’ and what I can do ‘not so legally’? Also, is it common practice for people to re-restrict even though they aren’t supposed to? My immediate thought is ‘how would anyone know?’
Thanks very much. Great site by the way.
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Post by Gavin on Nov 25, 2005 15:11:46 GMT
There are strict guidelines on moped classification and if you want to remain legal, these must be observed.
The max speed allowed for a moped (and this includes going downhill) is 50 kph (about 30 mph). You ask how would anyone know if the moped had been deristricted, well imagine you are driving down the road on your moped at 65 kph, and a police car is following you, they check your registration on the police computer and it comes back as registered as a moped, the police then know that the moped has been deristricted, because it shouldn't be able to do 65 kph as a moped. The same thing could happen if you got caught in a speed trap.
On Men & Motors, it showed a 16 year old lad being pulled up for speeding by a patrol car, they noticed that he had an exhaust that was not legal so they checked more closely, and found out he was only 16, then did him for more than just the speeding, but I can't remember the exact details.
I don't think changing the rollers to lighter ones would be illegal, as it probably does not affect the BHP, or speed, only increases the revs.
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Post by cunning on Nov 25, 2005 16:55:45 GMT
Thanks very much for that – I’m not sure I explained my point properly though. I’m not really that interested in going more than 30mph, and I don’t want to lose the moped (or car) license that I’ve used for 20 years, but if I want to improve the performance of the scooter to make it a bit safer pulling out of junctions or to get up hills a bit easier, is the only choice to do this by de-restricting? I didn’t understand where the line was drawn, and not being massively technically minded I couldn’t see how making improvements to make it run better could be illegal. I guess what you’re saying is that you can do what you want to improve things like acceleration, as long as the scooter is still limited to 30mph? I think what started me thinking about this was how easy all this looks to do – I’d always thought de-restricting was some massively complicated/expensive process!! Thanks again for your reply though.
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Post by hypojam on Nov 25, 2005 17:24:14 GMT
You can tune a 50cc moped as much as you like aslong as it doesnt go above 30mph there isnt any problems
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Post by hypojam on Nov 25, 2005 17:26:29 GMT
You can increase your performance a bit more by fitting some lighter variator rollers.
But no one has ever fitted lighter rollers on a restricted bike before so it might not work properly
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Post by BillyGreen1973 on Nov 25, 2005 17:33:08 GMT
Lighter rollers on a restricted bike would be terrible!!
This is because the lighter rollers increase the engine revs, allowing better acceleration, however, the bike is restriced by the rev limiter. This would have the effect of the engine reaching max revs earlier, meaning a lower speed, maybe even to the point of only getting around 10Mph!!!
Hope that makes sense.
The alteration to the carb will be legal, and allow you to have more power, but as before, only upto a certain rev limit set by the CDI (i.e. equal to 30 mph top speed)
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Post by BillyGreen1973 on Nov 25, 2005 17:34:08 GMT
By the way, altering the carb settings would not be classed as derestriction, because the bike will still only do 30 mph.
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Post by Gavin on Nov 25, 2005 19:08:06 GMT
By the way, altering the carb settings would not be classed as derestriction, because the bike will still only do 30 mph. The only stipulations I can find for a moped are that the engine size must be under 50cc, it has a maximum speed of 30 mph, and it must not weigh more than 250kg. I thought originally that there was also a power restriction, but this is for learners riding motorcycles up to 125cc. On a technical note, altering the carb settings 'might' enable the moped to go over 30 mph, even with the rev restrictor still in use. I have noticed that when going down steep hills, I can exceed 30 mph, not by much, but maybe 3 or 4 mph, and I am wondering if this is why the carb is also restricted. |
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Post by hypojam on Nov 25, 2005 23:05:32 GMT
Some Chinese scoots don't have an electrical restriction
mine didnt and hasnt
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Post by BillyGreen1973 on Nov 26, 2005 0:14:16 GMT
Some Chinese scoots don't have an electrical restriction mine didnt and hasnt Your quite right. some have a limiting ring in the drive pulley. this preventing the bike from reaching top gear and therefore limiting overall speed. I know yours doesn't have this ring, cos you changed your rollers a few times. Did you have the bike from new, as i'm wondering how it was restricted since it must have been at some point. |
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Post by hypojam on Nov 26, 2005 10:35:08 GMT
Some Chinese scoots don't have an electrical restriction mine didn't and hasn't Your quite right. some have a limiting ring in the drive pulley. this preventing the bike from reaching top gear and therefore limiting overall speed. I know yours doesn't have this ring, cos you changed your rollers a few times. Did you have the bike from new, as i'm wondering how it was restricted since it must have been at some point. My Bike has been able to go 40+mph since it was brand new  I haven't seen any type of restriction on my bike, so i guess they didn't put one on  |
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