final gearbox bearings - removal By godfeast (Read 1,191 times)

[godfeast]

One thing down, another to go:

Found out one of the screws to the final gear box had come out and all the fluid drained. Bearings all are shot.

I have a donor gy6 with solid gearbox cover and even good bearings inside - need to know how to remove and place these in the other engine without damaging the bearings.

Are these just heated and popped out or is a special puller used?

Also, we were talking about changing the gearing on this bike in another thread - which of the gears gets swapped out in doing that?

[alleyoop]

Remember heating something EXPANDS the metal, so you do not want to do that, you will need a puller or you can try heating eh case around the bearings.

Here is the info on the Gears to replace.

thescooterprofessor.proboards.com/index.cgi?board=trikecvt&action=display&thread=1962&page=1

Alleyoop

[godfeast]

Im looking around, but wondering if you know of anyplace that sells a gy6 counter shaft gear of that size already on the shaft?

[alleyoop]

This place will press them on for you and send you the whole thing just slap it on and the Final Gear and done. Little more expensive but
Alleyoop
.scootertronics.com/gy6150fidrge.html" rel="nofollow" target="_blank">.scootertronics.com/gy6150fidrge.html

[godfeast]

I couldnt get to a slide hammer and bearing puller today, so in order to get bike running again, I'm trying the torch thing to heat them out.

I cant say I'm not nervous - last thing I wanted to do is take a hot flame to a machine that constantly leaks oil and gas all over itself. MEH

Ill look into the gear change next week, but thanks for pointing me in the way alley.

[alleyoop]

Also count the teeth on that reduction gear that gets pressed on the Counter Shaft, they have different sizes.
Alleyoop

[godfeast]

alley - waiting on gearing still, but looking at my variator while I am at it.

I noticed that the belt isnt moving into the last 1/2 inch of the variator face, so thinking I need to upgrade my stock 14 gram wieghts, but wondering if I can I just buy a 115mm variator face off ebay with some heavier weights and stick it on the old variator body I have?

Ive looked at websites trying to explain how it works exactly, but its unclear if the belt is pinched the whole way by both sides of the variator, or if at the last portion of outward travel, its just rubbing against the outer variator face.

[alleyoop]

The outer Face Pulley is stationary, that is the one with the FINS ON IT for cooling. The Variator is the one that moves in and out on the BOSS(that is why they call it that) it Variates in and out and squeezes the belt up the two pulley faces.

Now the belt will only climb as high as the SMALLEST PULLEY and if you notice the OUTER FAN PULLEY is larger than a stock VARIATOR so in that setup the belt can only climb as high as the smallest of the two. That is why people get the 115mm Diameter Variator to match the Fan Pulley so that now the belt if possible can be squeezed enough to climb higher on the pulley which will give you more top end mph.
Alleyoop
Here is a good Demonstration of a how the CVT all works.

[godfeast]

I see.

I'd have to take my cvt cover off again to double check, but do I read this

That is why people get the 115mm Diameter Variator to match the Fan Pulley

to say that, in general, stock variators are made in such a way that adding a larger face will allow further travel on the belt with the proper weights?

I broke a fin off my variator the other day anyway, so I was wondering if buying the larger face would make a difference (why I am posting about this now rather than after I do the gearing).

[alleyoop]

Yep that is correct, with the proper weights and rpms you can get the belt to climb higher for more top end speed. But the bang for your buck is still the gearing just a little more work.
Alleyoop

[godfeast]

Yeah, but now ill also buy a 115mm pulley face by itself off ebay to replace the one I have with the broken fin.

[alleyoop]

Gogfeast,
Is your motor a 157QMJ? If so PM TVNACMAN he sells performance Variators and the Fan Face plate with it PLUS rollers.
And you cannot beat his price, as a matter of FACT I am running with one of his VARIATORS that I ordered from him. It is 115mm in diameter.
Alleyoop

GO CHECK THE PARTS OUT FROM JOHN(TVNACMAN):

thescooterprofessor.proboards.com/index.cgi?board=specials&action=display&thread=800