after fitting my new polini racing 50 kit today, and getting it running, ive noticed it runs slow, slower then my standard engine, i have a 12mm carb on the bike atm i guess thats whats wrong but how long should i run it in for ? and apparently im supposed to use 3/4 throttle Thanks Joe :cheers:
Take it easy for the first 50 miles especially.. after that just dont be stupid with it.. i.e full throttle for minutes on end, people always go way ott with runnin in kits... 150/200 miles should be fine :good:
always best to go for a 17.5mm over a 12mm i guess... spesh if uve got a sport 50 12mm is barely enough for a standerd 50 LOL Make sure it isnt running lean either.. that will make it run super shit
bad move geting a racing 50 kit as all there built for is racing...and ther as illegal as having a 172 engine in there infact having ur ped derestricted is as ilegal as havin a 172 engine in it but this kit is for RACING so will need a better carb im not too sure but id say even 17 would be too small for this i wuda thought more 20.5-21 would be a minimum tbh jus go get a polini sport or sumin better speed and just as ilegal and if this kits 1 ring more reliable too
it may run fine but simple fact is your carb is holding your kit back get a bigger carb...its like having a fully ported 183 engine with a good exhaus etc then using a stock 20.5mm carb it will work but it will hold it back
On a 50cc cylinder you can run the 12mm carb but it should be upjetted to suit! Although a 17.5mm carb will work alot better. And I dont think a 50kit is illegal, its illegal to increase bore size. Not illegal to increase power. Not 100% sure on this but I THINK a racing 50cc cylinder is legit providing the bike was previously 50cc. Should have just got a 70kit though mate, those 50 kits are supposed to be prone for going bang due to the single ring piston and higher RPM's. And in some cases on the polini sport 50 the piston ring scrapes the exhaust port and ruins the kit. Although its probably a good kit, these problems might be from noobs who couldnt fit/setup the kit correctly.
50 racing kit is not like a stock 50 cylinder a 12mm carb WILL restict the full potential and as soon as the bike is derestricted it DOES become ilegal wether 50 70 125 172 183 whatever you like your insurance becomes void soon as bike is derestricted and you tax becomes invalid to plus assuming hes 16 he is now riding without a liscence tax or insurance so he may aswel have got himself a 2 ringed 70 kit where he would be just as ilegal as he is now and he wouldnt have to worry about his kit fucking up
this is nothing like having a fully ported 183 with a good exhaust?! it's a 50cc sport kit waste of money and he was stupid and should have bought a 70 sport kit and just told his dad it was a 50.
u missed my point i was talkin bout how his carb is holding him back i think i moved on from sayin racing 50 kit was bad idea
u still compared a fully ported 183 to a 50cc sport kit, a 17.5 is ideal but not worth it unless u up it to a 70 sport kit and get a 17.5 or 19
no i said running a kit designed for a 50cc racing class and running a small carb is as stupid as owning a fully ported 183 with a stock carb and remember this is a cylinder designed for racing so i would advise going for 20.5 carb and above
yeah but it's not as stupid isit really, the onyl way it would be fair is saying running a 20.5 ona fully ported 183 and a 17.5 on a evo 3
i have polini sport 70 on my rox. does about straight down top speed which is about 62mph which is ok ish. acceleration is wank tho. my mates standard aerox is just as good. i have a standard gurtner shite carb as well mate. wanna get rid asap. i'd get a bigger carb tho mate ffor sure
In terms of the legal side, a 16 year old cannot go above the power of a moped, or 49cc. The definition of a mo-ped is infact something which can only go 50 km/h...although technically if it's the power of a 49cc, and it goes 50mph, you could argue that it is still 49cc. Also remember though when youre 17 you can ride a 125cc, at which point it is completely legal to de-restrict a 50cc. However - in theory you would then be riding not in accordance to your insurance, unless you informed them about your de-restriction and probably upped your premium. But lets be honest - the police have better things to do than stop 16/17 year olds who have scooters which can actually KEEP UP with the traffic flow they find themselves in.
