Description
Single set of Polini clutch springs.
Tuned engines usually reach their maximum power only higher up the rev range, the engine will suffer from a loss of power at low revs though, resulting in slower acceleration. Polini offers this set of clutch springs in different strengths for stock clutches to bridge the gap in the power band. Should be included in the order if you’re purchasing a sport exhaust!
Black (weak)
Tuned engines usually reach their maximum power only higher up the rev range, the engine will suffer from a loss of power at low revs though, resulting in slower acceleration. Polini offers this set of clutch springs in different strengths for stock clutches to bridge the gap in the power band. Should be included in the order if you’re purchasing a sport exhaust!
Black (weak)
Questions about the product
Notes and Safety
Polini Speed Clutch
The Speed Clutch series from Polini covers the entire range of scooter clutches. Here you will find clutches for 50cc scooters and maxi scooters that not only improve clutch performance, but also the service life of the clutch compared to the original.
This series also includes several other variants, such as 2G, 3G, 3G Evolution and For Race. All clutches are reinforced to cope adequately with tuned engines.
As the name suggests, the For Race clutch is designed for the most powerful racing engines.
Clutch springs
No matter what kind of clutch is used on your bike (multi-plate wet clutch, centrifugal clutch ...), springs are always needed for clutch engagement. These springs do not all look the same, but they have more or less the same function, namely fot the clutch to engage / disengage.
In multi-plate clutches like those found in supermotos, motocross bikes, and motorcycles with manual transmission, the springs fatigue and shrink over time, and when they eventually become too small, the clutch will slip.
On motocross bikes, you also see diaphragm springs (KTM type) more and more often. In this case, the spring is a sort of large, domed disc. It needs to be replaced when it gets too flat, which also leads to clutch slippage.
There are also dry clutches (Ducati type) that are sometimes found on tuned 50cc bikes. The springs are similar to wet clutches.
On scooters with a centrifugal clutch, the springs will gradually lose tension, making clutch engagement increasingly spongy.
Technical details
| Clutch springs Polini Speed Clutch Minarelli 107mm, d=1.7mm, black (weak) | |
|---|---|
| Article no. | U245.013 |
| EAN | 8054705080043 |
| Weight | 0,02 kg |
| Series | Speed Clutch |
| Brand | Polini |
| Product type | Clutch springs |
| Clutch diameter | 107mm |
| Spring rate | +20% |
| Colour | Grey |
ATU
Adly (Her Chee)
Aprilia
Amico 50cc AC (1991 - 1992)Amico 50cc AC (after 1993)Amico GL 50cc ACAmico Sport 50cc ACArea 51 LCGulliver 50cc ACGulliver 50cc LCRally 50cc ACRally 50cc LCScarabeo 50cc AC (after 1998)Scarabeo 50cc AC (before 1998)Sonic 50cc ACSonic 50cc LCSR 50cc AC (1994 - 1997) - Minarelli horiz.SR 50cc AC (before 1994) - Minarelli verticalSR 50cc LC (1994 - 1997) - Minarelli horiz.SR 50cc Netscaper LC - Minarelli horiz.SR 50cc Racing LC (before 2000) MinarelliSR 50cc Stealth LC - Minarelli horiz.SR 50cc WWW AC (after 2000) Minarelli engineSR 50cc WWW AC - before Minarelli engine
Baotian
Benelli
491 50cc GT AC (before 2003) - Minarelli horiz.491 50cc RR LC (before 2003) - Minarelli horiz.491 50cc RR Replica LC (before 2003) - Minarelli horiz.491 50cc Sport LC (before 2003) - Minarelli horiz.491 50cc ST LC (before 2003) - Minarelli horiz.K2 50cc AC - Minarelli horiz.K2 50cc LC - Minarelli horiz.Naked 50cc AC (before 2003) - Minarelli horiz.Pepe 50cc AC (before 2003) - Minarelli horiz.Pepe LX 50ccQuattronoveX (49X) 50cc 2-stroke AC
Benzhou
Beta
CPI
Aragon 50ccAragon GP 50ccBingo / Tennessee 50cc (before 2003)Formular R 50ccFreaky 50ccGTR 50cc LC - Minarelli horiz.Hussar 50cc AC (after 2003) - Min horiz. (pin 12mm)Hussar 50cc AC (before 2003) - Min horiz. (pin 10mm)Oliver 50cc AC (after 2003) - Min horiz. (pin 12mm)Oliver 50cc AC (before 2003) - Min horiz. (pin 10mm)Oliver City 50cc AC 2-stroke (12mm) (after 2005)Oliver Sport 50cc AC 2-stroke (12mm) (after 2005)Popcorn 50c AC (after 2003) - Min horiz. (pin 12mm)Popcorn 50cc AC (before 2003) - Min horiz. (pin 10mm)
Diamo
Eppella
Explorer (ATU)
Forstinger
Garelli
Generic
Candy 50ccClassic 50ccCommodo 50ccCracker 50ccEpico 50cc 2-strokeEvolution 50ccHi 50ccIdeo 50cc ACIron 50ccJump 50cc 2-strokeKallio 50ccOnyx 50cc 2-strokePandora 50cc 2-strokeRace 2 50cc 2-strokeRace 50cc 2-strokeRace GT 2 50ccRace GT 50ccRoc 50ccSirion 50cc 2-strokeSpeed 50ccSpin GE 50ccStroke 50ccToxic 50cc 2-strokeVertigo 50cc 2 strokeXOR 2 50cc 2-strokeXOR 50cc AC
Jonway
Kallio
Keeway
Agora 50cc 2-strokeArn 50cc 2-strokeEasy 50cc 2-stroke after 2009F-Act 50ccF-Act 50cc 2-stroke after 2009F-Act NKD Naked 50cc 2-strokeF-Act Racing SP 50cc 2-stroke after 2009Flash 50ccFocus 50ccGoccia 50ccHacker 50ccHurricane 50ccMatrix 50ccMatrix SP (V3) 50cc 2-stroke (2007-2008)Matrix SP (V4) 50cc 2-stroke (after 2009)Pixel 50cc 2-stroke after 2009RX8 50ccRY6 50ccRY6 50cc 2-stroke after 2009RY8 50ccRY8 EVO 50cc 2-strokeRY8 Racing 50cc 2-strokeRY8 SP 50cc 2-strokeSwan 50ccVenus 50cc 2-stroke
Kreidler
Longjia
Digita 50cc 2-strokeEstate 50cc 2-strokeExcatly 50cc (2 stroke)F1 50cc 2-strokeFirefox 50cc 2-strokeGrido 50cc 2-strokeLJ50QT-F 50cc 2-strokeLJ50QT-K 50cc 2-strokeNew Pach 5cc 2-strokeSpeedjet-Evo 50cc 2-strokeSpeedjet 50 LC 2-strokeTrevis 50cc 2-strokeTwo Liquid 50cc 2-strokeVersus 50cc 2-strokeZero One 50cc 2 stroke
MBK
Booster 1992 - 1999Booster after 2004Booster before 2004Booster Next Generation after 1999Booster Next Generation before 1999Booster OneBooster TrackBooster X 50cc 4-strokeEqualis 50cc ACEvolis 50cc ACFizz 50cc ACFlipper 50cc ACForte 50cc ACMachG 50cc ACMachG 50cc CAT LC (after 2003)MachG 50cc LC (before 2003)Nitro 50cc 4-strokeNitro 50cc CAT LC (after 2003)Nitro 50cc LC (after 1999)Nitro 50cc LC (after 2013)Nitro 50cc LC (before 1999)Nitro Naked 50cc LCNitro Naked 50cc LC (after 2013)Ovetto 4-strokeOvetto 50cc AC 2008Ovetto 50cc AC before 2008Ovetto One 50cc (after 2013)RocketSorriso 50cc AC (after 1996)Stunt 50cc ACStunt 50cc AC CAT (after 2004)Stunt Naked 50cc AC
Malaguti
Centro 50cc (until 2008) (Minarelli-engine)Centro 50cc ACCiak 50cc ACF10 CAT 50cc AC (after 1999)F10 Jet Line 50cc AC (before 1999)F10 Wap 50cc (CPI after 2008)F10 Wap 50cc AC (after 2004)F12 Phantom 50cc ACF12 Phantom 50cc AC (after 2004)F12 Phantom 50cc AC (CPI after 2007)F12 Phantom 50cc LCF12 Phantom 50cc LC (after 2004)F12 Phantom R 50cc ACF12 Phantom R 50cc LCF15 Firefox 50cc AC (after 2004)F15 Firefox 50cc LCF15 Firefox 50cc LC (after 2004)Yesterday 50cc AC
Mawi
Meteorit (ATU)
Motobi
Motofino
Motowell
Motoworx
MuZ / MZ
Anthony 50cc 2-strokeMax 50cc 2-strokeMoskito Classico 50cc 2-strokeMoskito FB 50cc Base 2-stroke after 2003Moskito FB 50cc Base 2-stroke temps (until 2002)Moskito RX 50cc 2-stroke (after 2003)Moskito RX 50cc 2-stroke (until 2002)Moskito SX 50cc 2-stroke (after 2003)Moskito SX 50cc 2-stroke (until 2002)
Nova Motors
Powersports Factory
Qianjiang
REX (Jinan Qingqi, Shenke)
RIDE
RS Ultima
Revonec
Rieju
Sachs
Seiran
Sprint
Tauris
Yamaha
Aerox 4 50cc 4-strokeAerox 50cc LC (after 1999)Aerox 50cc LC (before 1999)Aerox 50cc LC CAT (after 2003)Aerox Naked 50cc LC (after 2013) Aerox Naked 50cc LC CAT (after 2003)Aerox R 50cc LC (after 2013)Axis 50cc ACBreeze 50cc ACBW's 50cc ACBW's 50cc AC (after 2004)BW's Bump 50cc ACBW's Easy 50cc 2013BW's NG 50cc AC (after 1999)BW's NG 50cc AC (before 1999)C3 50cc 4-strokeGiggle 50cc 4-strokeJog 50cc ACJog R 50cc ACJog RR 50cc LC (before 2003)Jog RR 50cc LC CAT (after 2003)Neo's 50cc 4 strokeNeo's 50cc AC 2008Neo's 50cc AC before 2008Neo's Easy 50cc 2013Slider 50cc AC (before 2004)Slider 50cc AC CAT (after 2004)Spy 50cc ACTarget 50ccVino 50cc 4-strokeWhy 50cc ACZest YE 50cc ACZuma 50cc ACZuma II 50cc AC
Yamati
Znen
Bob 50cc [ZN50QT-25F] (2-stroke)Bobby 50cc [ZN50QT-25C] (2-stroke)Bomb 50cc [ZN50QT-25A] (2-stroke)Eyas 50cc [ZN50QT-25D] (2-stroke)Falcon 2 50cc [N50QT-7A] (2-stroke)Falcon 3 50cc [ZN50QT-7B] (2-stroke)Falcon 4 50cc [ZN50QT-7C] (2-stroke)Falcon 5 50cc [ZN50QT-7D] (2-stroke)King 50cc [ZN50QT-19C] (2-stroke)Owl 50cc [ZN50QT-25E] (2-stroke)Snail 50cc [ZN50QT-A] (2-stroke)Sun 2 50cc [ZN50QT-11C] (2-stroke)Sun 50cc [ZN50QT-11C] (2-stroke)Wacky 50cc [ZN50QT-25] (2-stroke)ZN50QT 50cc 2-stroke
4
1 Ratings