Scooterotica

Is a Cosa clutch any lighter than a normal T5 clutch, I mean lighter by pulling the clutch lever. bought the engine to replace existing PX engine, rebuilt the engine earlier this year and it has been a bitch pulling the lever to change gear.

And is it a 20 tooth clutch that would be used.

Cheers Bruce

Yes a cosa clutch is far lighter at the lever ,even with competition springs fitted. They are not without problems now so many different makes are or have been available but i havent had any trouble with genuine or newfren , i have had a genuine in a malossi T5 engine since the late 90s and i currently have a reinforced newfren one in a 200 motor .

http://www.sip-scootershop.com/en/produ ... n_93032000
(couldnt find a 20 tooth one)

T5's are 20 tooth standard i think but will take 21 and 22 , the more teeth here the slighter higher the gearing, but if it's a standard engine i'd keep to 20.
You can buy the separate clutch gear cogs too to swap about.

I agree with cit205 . The cosa clutch is much easier to use than a standard T5 one . The only issue I've had is drag but that can be cured by filing out the turrets to 22mm deep from the edge in . I've had to do this on the 2 newfren cosa clutches I've used . With a pattern piston which is lighter than the piaggio one and has wider cutouts either side , my T5 has no problems pulling a 21 tooth clutch . Ok.... it's not the quickest up hills or into headwinds but in fairness , only kitted T5's can deal with hills and wind anyway . The sito plus exhaust helps a little bit if you can put up with the headwrecking noise !

Another thing to watch causing drag is the the clutch gear boss being slightly sub-flush instead of slightly proud, but like the window filing i've never had this problem, and they are easily enough rectified.

mine u can pull in with one finger but there a noiser than the standerd clutch worth it though

a cosa clutch is definately a lighter action but a well set up standard old type clutch should not be "a bitch pulling the lever to change gear"

i set up a malossi 172 using a genuine old type clutch and it is smooth and light - it has done loads of miles and is thrashed through the gears constantly

if it is such a problem pulling it in I think there is something else wrong - cluch not assemble correctly, plunger, cable badly routed/adjusted.

Dont be in a hurry to spend £100 on a cosa clutch

gaz

Eventually got round to looking in to this properly. In the end all I had to do was change the push rod and pressure plate. These were both badly worn when compared to new ones. Clutch now works easily. Good result only spent £5 instead of £100 for a new clutch.

Just to let you know in case anyone has same problem

Cheers bruce