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I´m still in the garage putting my SuperBravo sprint racer together and I still have some thoughts and ideas about the clutch.
If I want the clutch shoes to engage later it could be done by removing some weights off the clutch shoes.
That way´the rpm must be a little higher to press the shoes to engage the clutch bell, right?
The idea is to allow the engine revv up a little higher before the clutch beginn to pull the machine.Has anyone tried that before me and what is your experience with that?
At what RPM can I expect the stock clutch to engage?
Don’t know the exact revs on what your clutch will grip, but this will work since people did this before. Also this way it’s easier to replace the clutchsprings all together. Keep in mind there are some bolder springs to get the same results as lightening the shoes.
Photo taken from Tonni
Thanks for the reply Martino,
One problem with bolder springs may be to know what to get and how much it will affect the action.By reducing the weight step by step I can stop where the desired function is present.
Depending of what type of Clutch you have. There are many different clutchsprings variating in the strongness. Most of the time they come in 3 sets of 3x springs. So you have some finetuning to do till your desired effect is found.
An example.
http://www.jmpbonderdelen.nl/ciao/motordelen/variodelen/trekveerset-a-kopp-malossi-vespa.htmlOK, I didn´t know, good to learn new things every day.
Will these springs also fit my aftermarket clutch?:
http://www.jmpbparts.com/ciao/motordelen/variodelen/achterkoppeling-cpl-imi.htmlOops,:boos unfortunately you have the one clutch who is not ready for this type off springs. So your option could be what was your first question of this topic. The problem lies in a different kind of springs. In which this aftermarket clutch has one circled around keeping the shoes tightened.
Better yet, try to find an originally Piaggio clutch.;)
Too bad, I bought this clutch new just before Christmas before I had learned anything about those bikes.
At what rpm´s does the stock clutch engage, roughly?
About the “poor” cluth I have, will I gain anything by using the yellow pressure spring that came with my Malossin Multivariator? I think that the taps of the Malossi spring has to be ground off or holes in the dics have to be drilled.
Now I know a little more but I still have a lot to lean, I realize that.
It’s very difficult to say at which revs this stock clutch will engage. It also depends on how strong your motor is?
For instance. I personally should find the right revs at which your motor is the strongest and try to find this moment in engaging the clutch.It could be useful to install the yellow pressure spring from Malossi and the Multivar. Both the changes will result in somewhat higher revs of engaging, but the pressure spring mostly does the effect of a slipping belt go away. Since using a 43mm bore cylinder. This pressure spring is almost a must.
As you said, in combination with this aftermarket clutch you need to do some work on spring or pulleys.OK, I had to open my clutch to see what I was working with…
I found this wich I see don´t have the same kind of springs.
By comparing my picture to yours, Martino, is seems like this clutch have a lot more material to connect to the drum.
It also seems like my option is to find a useful Piaggio clutch and use the harder springs or to fiddle with the weight of the shoes on this clutch.It should be possible to put on the yellow Malossi spring that came with the variator to gain some pressure on the belt disc but I must either remove the taps or to make spacers that will take care of the taps and also put even more pressure on the disc.
I will have to see wich way to go.
UPDATE:
Will the tap ends on the yellow spring make any improvements?In theory it will make the moveable disc spin with the axle and support the fixed disc in gripping the belt.
Does anyone here know if the problem with slipping belt is bigger on my kind of clutch where the disc can spin freely?On the other hand, the vatiator also have one fixed disc and one disc that is spinning freely so a one side disc may be enough to grip the belt?
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