What are the options? Anything close? Euro options?
Hobbit variator alternatives
Re: Hobbit variator alternatives
We have our Six roller setup that is pretty sweet on kitted setups. Check it here!
If stock, notched is fun or you can do a stock 6 roller for more weight options. I have a few stock euro 6 roller variators kicking around if that's more your speed. If you have a stock crankshaft, its definitely better option.
Re: Hobbit variator alternatives
TJT with the treatland rumpus plate is the best I've tried
Re: Hobbit variator alternatives
Thats what im running but am looking for something slightly larger diameter. Have
lathe and mill available also cnc water jet.
Re: Hobbit variator alternatives
Sounds like you need to install a set of malossi gears for a taller final drive gear range.
Re: Hobbit variator alternatives
> Chris Carleton Wrote:
> -------------------------------------------------------
> Thats what im running but am looking for something slightly larger
> diameter. Have
>
> lathe and mill available also cnc water jet.
I made one, and frankly have been worried to put it on anything because its probably so big I'll break a crank in no time.
Re: Hobbit variator alternatives
You aren't thinking right.
You can't go much higher because of the fixed cheek on the clutch bell.. You gonna go above that?
Can't do it
Even if you cut the vari you can't go much higher than the bell allows.
then not to mention probably not varoating enough in the rear pulley.
If the front pulley goes farther than the rear it fucks up the crank and bearings.
A cut TJT is about as high as you can go.
Re: Hobbit variator alternatives
Are you referring to cutting the back side of the tjt so it will open further for the belt to sit deeper?
Not suggested if you're running a thin belt.
But you should definitely modify the rear pulley so it has more Gering range so you don't stress our break the crankshaft.
If you don't do this you're going to have to run the belt loose
Re: Hobbit variator alternatives
You can do whatever you like,
Cutting the rear allows a fatter belt to fit all the way down to the boss,
If you're using a thinner belt after this mod no big deal. Just add fiber washers between the ramp plate and vari
But to get the belt higher you have to cut the tjts pulley face to be more steep. I went as far as possible and a lil too far recently, making holes. I'm gonna fix it with that zinc brazing rods and recut the cheek.
Re: Hobbit variator alternatives
Yes the stock combined and pulley cheek angle is 28 degrees.
And what I need is a 30 degree angle belt but nobody seems to make one without it being at least 17 mm wide.
I need a 15/16 max mm wide belt with a 30 degree combined angle.
The AX BX series belts happened to be 36 degree's so you lose a lot of power due to friction
Re: Hobbit variator alternatives
Belt angle doesn't mean shit.
I cut variators to steeper angles all the time and I've had zero problems. Belts are malleable
Re: Hobbit variator alternatives
> JBOT Admin Wrote:
> -------------------------------------------------------
> You aren't thinking right.
>
> You can't go much higher because of the fixed cheek on the clutch bell..
> You gonna go above that?
>
> Can't do it
>
> Even if you cut the vari you can't go much higher than the bell allows.
>
> then not to mention probably not varoating enough in the rear pulley.
>
> If the front pulley goes farther than the rear it fucks up the crank and
> bearings.
>
> A cut TJT is about as high as you can go.
Exactly,
I had thoughts of making a custom rear pulley with more travel, so I made the biggest variator I could. using this to its full variation will require me to weld up the clutch bell and machine the edge sharp. Then make a rear pulley with more travel.
Re: Hobbit variator alternatives
I will warn you,
It can be done, but it also can warp really really bad if you get it too hot.
Most likely you could true it up mostly in the bell and on the cheek, but in my experience it's awfully dicey at high rpm unless you have crazy good welding skills.
Its a much easier and better way to add race gears. Then when you get to the top of the range you're about as far as you could go.
Re: Hobbit variator alternatives
Do you happen to know if the Derbi bells are any larger OD? I see treatland just added some to the site.
Re: Hobbit variator alternatives
I've successfully cut the fixed cheek pulley at a more extreme angle and it works really well. I pushed back the base at the boss like 4mm.
Helps it variate much faster if you have the power.
Re: Hobbit variator alternatives
Derbi bells are cast.
Not so great.
Re: Hobbit variator alternatives
I just put a whole scooter transmission on them.
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