moby performance mods...

so, i've heard rumours of performance mods that can be done to stock 50v clutch/variators?

just curious if anyone has attempted/succeeded at any mods on a stock variator, and if so, what did the mod entail?

Re: moby performance mods...

by the way, i've seen the thread about wari's spring-pulley monstrosity, though i found it difficult to understand without photos...any light that could be shed on that using everyday dummy terms would be awesome.

Re: moby performance mods...

fish_SHARK /

you can take material off the plate allowing the bike to variate completely, pushing the belt up a little more, resulting in a few mph's. you can also remove a ball out of the variator, same sort of effect as tightening the springs on a centrifugal wet clutch.

Re: moby performance mods...

Well you have some options. If you have a clutch pulley then you can do this . If you want to keep some clutch function you can do this . Thing is with that they don't mention is if you remove the two big arms inside (the starter clutch part) then you can't start the bike anymore. They mostly have kickstarters so it's not a big deal, but we don't. There are ways around it and if you are interested you can email me.

They remove the starter clutch to reduce weight and to allow the main clutch to be tuned. If you cut the tabs like the say without removing the starter then as soon as the bike starts to move they lock up and keep it from grabbing at higher rpms like you want it to. And as you know they grab at a walks pace.

The other nice piece the the Malossi Varioplus plate that replaces the ball ramp piece. Elliot's thread the best on it. Otherwise you want to get a 4 ball plate and run 2 in it, running 2 in a 3 ball will make the balance very very wrong and can cause crank breaking issues along with crazy vibration. And that's all there is to them.

Re: moby performance mods...

fish, i've heard of this mod, and must say i found it the most intriguing. how do you go about taking the material off the plate?

Re: moby performance mods...

oh, yea the belt thing. Well, there are different widths of belt. Skinny belts will sit at the very bottom, can slip before the variator move out to grab it and will not ride all the way at the top of the plate, losing top end speed. Wider belts may not sit all the way at the bottom losing take off power, but ride higher on the plate giving you better top end, or maybe riding higher than the plate face. A belt that rides too high or is too short can cause the clutch to crash into the pulley wheel. Since this is a french bike and most likely metric belts standards do apply, most of the belts we get here are not quite right. So people either shim the plates out or cut the inside of the plate so that it will close together closer and give you more top end.

But if you do any machining on your plates, you need to remember to always buy the same belts. If you switch brands then you might find it crashes now when before it didn't. So it's a mod that you have to be careful with. Even though you are buying the same size belt every time, they all slightly different sizes and lengths. At that point though it is pretty fine tuning of the bike. Worry about bigger things first.

Re: moby performance mods...

table grinder.....don't grind too far or you will loose your weights....also, keep in mind that removing a ball only causes your variator to open later rather than sooner and has no real effect on your overall top speed.

Re: moby performance mods...

exactly what i was thinking, allen. thanks.

Re: moby performance mods...

dude, you guys are sick. thanks for all the great info!

« Go to Topics — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account