de-restricting 125cc

[randomideal]

Just wandering where the restrictors would be, my friend who is fixing my bike (after accident ) said that they would be in the exhaust and the Carb hopefully I can find a Suzuki gn / gs Carb non diaphragm. Would be any other restrictors anywhere else, cheers all. Bike is a keeway rkv 125cc.

[Conzar]

This is the best form of removing restrictors

https://www.the1stgear.co.uk/img/Our-Promises.jpg
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Current ride: ZX6R 636 ------- Previous:KTM EXC 450 Supermoto --- ZX6R B1H --Hornet 600--CBR 600--SV650
11:05:35 Rob Fzs: i just wanna own an rd350 valve before they send us to war with durkadurkastan

[SQL]

Its not restricted, its naturally gutless.

[P.addy]

They aren't restricted, its just a shit bike to start with, as above.

[randomideal]

I'm aiming to do my das asap but I need something to use now, if I passed my test I would get a bigger bike, cheers

[andy_uk]

[Piercee100]

It probably isn't restricted, but the carb's on those are usually tuned to run very lean due to other country's petrol quality and EU environmental restrictions. My younger brother has a Sukida sk125-2? something like that from 2007. Basicly a near copy of a CG125. He fitted an early carb from a 1980 CG model I think it was, and the exhaust and it will happily sit at 70mph now. Handles terribly but its quick for what it is and accelerates up to 50 as quick as my Suzuki 250 but then again he weigh's half of what I do .
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Rides: Honda H100a (Retired), VT500e (Sold), Kawasaki ZX400 (sold), Kawasaki GT550 (Sold), Suzuki Inazuma (Daily), Honda CD185t (Broken), LML Star 2t (Last run edition).

[Rogerborg]

[smegballs]

A common fault on these chinese engines is an excessively strong spring on the automatic camchain tensioner. Too much tension and it starts to put stress on the main bearings, as well as soak up what little power the 125cc engine is putting out.

Take the camchain tensioner out and see if the bikes performance improves. If it does, try and find a slightly weaker spring, swap this for the stock spring on the camchain tensioner and re-install. You don't want to run the bike for too long without the camchain tensioner as it might cause engine damage. Just a quick ride to see if it is any better will do.

Once you've found the state of play of the camchain tensioner, you might want to have a look at the powerband. Since the bloody Euro-3 laws, most bikes have to be fitted with green (fuel economy) powerbands to satisfy emissions regs and be eligble for type approval and import. If it is green, you might want to swap it out for a red one (top end power - good for motorways) or maybe a brown one (lose a bit of top end for a strong midrange) if you ever fancy trying a bit of off road.

[randomideal]