Piaggio NRG 50 cc scooter query
Discussion
Hi All
I have just bought a Piaggio NRG 50 cc scooter for my lad and i am just trying to get my head round how it works as it isn't great at pulling away form standstill but once it going its ok
It has a exhaust on it and is derestricted to some extent as it will hit 47mph.
A quick google seems to show this is not unusual but nothing hints towards a solution.
I wondered if the clutch is the issue and was just not taking up well and needed adjustment but i now see there is no adjustment and its just weight or spring strength tha makes a difference
Any experts on 2 strokes on PH that could gimme some advice on where to start and whether its all part of the big picture due to the exhaust being changed and moving of powerband etc.
I have just bought a Piaggio NRG 50 cc scooter for my lad and i am just trying to get my head round how it works as it isn't great at pulling away form standstill but once it going its ok
It has a exhaust on it and is derestricted to some extent as it will hit 47mph.
A quick google seems to show this is not unusual but nothing hints towards a solution.
I wondered if the clutch is the issue and was just not taking up well and needed adjustment but i now see there is no adjustment and its just weight or spring strength tha makes a difference
Any experts on 2 strokes on PH that could gimme some advice on where to start and whether its all part of the big picture due to the exhaust being changed and moving of powerband etc.
Pando99 said:
Hi All
I have just bought a Piaggio NRG 50 cc scooter for my lad and i am just trying to get my head round how it works as it isn't great at pulling away form standstill but once it going its ok
It has a exhaust on it and is derestricted to some extent as it will hit 47mph.
A quick google seems to show this is not unusual but nothing hints towards a solution.
I wondered if the clutch is the issue and was just not taking up well and needed adjustment but i now see there is no adjustment and its just weight or spring strength tha makes a difference
Any experts on 2 strokes on PH that could gimme some advice on where to start and whether its all part of the big picture due to the exhaust being changed and moving of powerband etc.
Well, it's a 50cc twist and go so it's not going to be breaking any acceleration records. With that in mind:I have just bought a Piaggio NRG 50 cc scooter for my lad and i am just trying to get my head round how it works as it isn't great at pulling away form standstill but once it going its ok
It has a exhaust on it and is derestricted to some extent as it will hit 47mph.
A quick google seems to show this is not unusual but nothing hints towards a solution.
I wondered if the clutch is the issue and was just not taking up well and needed adjustment but i now see there is no adjustment and its just weight or spring strength tha makes a difference
Any experts on 2 strokes on PH that could gimme some advice on where to start and whether its all part of the big picture due to the exhaust being changed and moving of powerband etc.
If it has had an exhaust, what else has been interfered with? Is the gearing standard? Has someone maybe changed it to obtain a greater top speed, at the expense of acceleration?
Unfortunately, it is common to find bikes and scooters that have been messed about with, where the messing about hasn't really worked, so the bike gets sold on.
Probably not the clutch as such but the variator rollers which are in the front variator. Check that they're not flattened - if they've got the tiniest of flat spots replace them. Remove the cover to expose the transmission, lock the front variator so you can undo the nut. Remember the order of the washers, spaces and what have you as you pull the front variator off, outer half first, remove belt and then slide off the innner half. The rollers are on the back of the inner half and held in place with a piece of metal. There should be nylon sliders on the metal plate which line up with guides - it'll be obvious when you see it.
Those weights roll outwards with engine revs, which then pushes that inner variator cone towards the outer and increasing the diameter of the pulley. This is held in balance with the contra spring which is inside the rear variator, and the rear variator has the clutch on the outside. If the rollers are perfect and that front variator slides as it should then look at the contra spring. That rear variator is held closed by that contra spring and you'd struggle to move the outer cone. With the belt off, grasp the outer cone and clutch - fingers into the variator and palms on the outer on the clutch bell - and try opening that gap between the cones up. It'll be pretty hard. If it's a piece of piss to move have a peek in there to see of the spring is busted or something. It'll more likely be the rollers which are knackered so they should be your starting point.
If the rollers are knackered it'll feel like you're starting off in top gear (if it had gears) as the front variator doesn't return properly as the revs drop (i.e. when coasting and coming to a stop) and effectively put you in "first gear".
The variators might be the wrong weight so check that too.
Those weights roll outwards with engine revs, which then pushes that inner variator cone towards the outer and increasing the diameter of the pulley. This is held in balance with the contra spring which is inside the rear variator, and the rear variator has the clutch on the outside. If the rollers are perfect and that front variator slides as it should then look at the contra spring. That rear variator is held closed by that contra spring and you'd struggle to move the outer cone. With the belt off, grasp the outer cone and clutch - fingers into the variator and palms on the outer on the clutch bell - and try opening that gap between the cones up. It'll be pretty hard. If it's a piece of piss to move have a peek in there to see of the spring is busted or something. It'll more likely be the rollers which are knackered so they should be your starting point.
If the rollers are knackered it'll feel like you're starting off in top gear (if it had gears) as the front variator doesn't return properly as the revs drop (i.e. when coasting and coming to a stop) and effectively put you in "first gear".
The variators might be the wrong weight so check that too.
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