Anyone tried the new 10G kit yet?

Ya, got a pic of that?
I am trying to picture how high you had to put the base to fit that big a sprocket on.

Sure.

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Since the sprocket is #35, it is considerably smaller than it would be if it used ½" pitch chain. It clears the SBP mount base anyway.

Sprocket diameter is roughly (Tooth count * Pitch / Pi), so a 76T #35 is only about 9.2". This is ¼" more than a 56T #41/415/410.
 
Sure.

Since the sprocket is #35, it is considerably smaller than it would be if it used ½" pitch chain. It clears the SBP mount base anyway.

Sprocket diameter is roughly (Tooth count * Pitch / Pi), so a 76T #35 is only about 9.2". This is ¼" more than a 56T #41/415/410.
Thanks for the pic and tip.
I hadn't considered using #35 chain for the JS to BB sprockets but it makes sense to get more gear reduction, how is yours holding up?
 
It has over 6K miles on it in this configuration, it hasn't needed anything but chains lubed. I also have the clutch-bell bearing mod (no bushing).

As of yesterday, my 4G's rear pulley bearing is about shot. It does have nearly 10K miles on it tho! I'll be on the lookout for a replacement bearing.
 
Nice numbers Alemen, I'll see what I can find in in a ketket procket for the 15mm shaft, where did you find your 5 hole pedal sprocket?
 
That 76T #35 reduction sprocket is a modified aluminum blank purchased online from JSE.
link: http://www.jackssmallengines.com/equipment/go-kart/Go-Kart-Sprockets/

The teeth needed sides beveled and the bore enlargened to fit my SBP freewheel.
I'm a CNC Laser Operator by trade, so the big cutouts were easy to get done at the shop.

My actual pedal sprocket is a standard SickBikeParts 44T with the center vinyl'd in red.
 
Since the sprocket is #35, it is considerably smaller than it would be if it used ½" pitch chain. It clears the SBP mount base anyway.

Sprocket diameter is roughly (Tooth count * Pitch / Pi), so a 76T #35 is only about 9.2". This is ¼" more than a 56T #41/415/410.
I was thinking about this last night...

Chain size and teeth count is meaningless in the reduction between 2 circular gears or pulleys, it this their diameter that matters.
Be it a smooth belt, a bunch of little teeth or a handful of big teeth does not change the reduction, only sprocket diameter changes gear ratio.

I can see #35 chain being helpful for a little sprocket so you get a couple more teeth on the chain, but that's it.
A 1/4" increase in the big sprocket is what you gained, I can do that with a 410 chain sprocket as well for the same result but keep all the chains the same.
 
Chain size and teeth count is meaningless in the reduction between 2 circular gears or pulleys, it this their diameter that matters.
Be it a smooth belt, a bunch of little teeth or a handful of big teeth does not change the reduction, only sprocket diameter changes gear ratio.

Not necessarily. If I used a 76T #41 sprocket, it would have been ~12" diameter and the ratio would be the same as it is now with the ~9" #35.
Tooth count and pitch play every bit as much into the ratio as sprocket diameter.

I can see #35 chain being helpful for a little sprocket so you get a couple more teeth on the chain, but that's it.
A 1/4" increase in the big sprocket is what you gained, I can do that with a 410 chain sprocket as well for the same result but keep all the chains the same.

Wrong here, too. Fact is, you couldn't do what I did with 410 chain, without resorting to enormous sprockets or complicated secondary reductions.
12" sprockets look a little ridiculous. No, you'd have to decrease chain pitch. An interesting alternative might be #25 chain.

#25 chain is only ¼" pitch. This means sprockets are a much smaller diameter despite their tooth count. An 80T #25 is only 6½" diameter.
Driven gears are available as small as 9T. Link: http://www.electricscooterparts.com/sprockets25chain-wheel.html
 
Your point is with smaller chain and more teeth you can get a sprocket diameter in-between what a tooth on 410 has, but it doesn't change the actual reality of gear ratio, that is the inside U diameter of the sprocket the chain rides in.

"Yes, 410 sprockets have longer and fatter teeth, enough to add what, ~2mm to the sprockets outside tooth end diameter measurement, or are you saying the smaller tooth size is enough for a 1/4" reduction in overall outside diameter sprocket size which sounds pretty close?"

I see that, I just want to make it clear that the inner U circle diameter of sprockets determines ratio, not what connects them.

Thank you Almen.
That was entirely my only point.
It's the size of the circles.
http://science.howstuffworks.com/transport/engines-equipment/gear-ratio2.htm

You can't magically get a different ratio by teeth count, what you can do with a belt or a lot of small teeth on a chain is make BOTH circles proportionally smaller in diameter and get the same the reduction.
 
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Your grasp of this simple fact is clouded with your perception that tooth size or count means anything in ratio.

It doesn't matter whether the outer crank sprocket is 6" in diameter or 12", it will have the same ratio if teeth count are the same, providing the same output.

The teeth and pitch dictate how fast the sprocket turns. You need to have a better look at your own "grasp of this simple fact".

Diameter is directly related to teeth count and pitch, and tooth count+pitch are what influence ratio in the case of sprockets.

You can decide to just use diameter as a figure, but you cannot discount teeth and pitch when discussing sprockets.

Divide the drive pulley diameter by the load pulley diameter.
The result will be the pulley and belt ratio.
For example: a 2-inch drive pulley and a 4-inch load pulley yields a pulley and belt ratio of 1/2. This means that for every 1 turn of the drive pulley, the load pulley will make 1/2 of a full turn.

Pulleys are not sprockets. They do not have teeth. Diameter means everything to a pulley. Pitch has no influence on them.

It simply does not mater what connects the two sprockets unless you think somehow a 2" sprocket to a 4" sprocket can somehow make something other than 1:2 gear ratio reduction by the chain or belt that connects them, they are one with each other regardless.

I never said otherwise. My point is that keeping the jackshaft output tooth count the same (here let's say 10T), one can change the pitch
of the chain to dictate how large of a reduction sprocket (here let's say 56T) is desired. The output sprocket will be a different diameter
as a result of pitch (1.59" #41, 1.19" #35, 0.79" #25) and so will the reduction sprocket (8.91" #41, 6.68" #35, 4.46" #25).

You claimed you could do the same thing with 410 chain that I did with #35. You simply can't, because ½" pitch has limitations. 8T is available, but hard on chains.
All you can do is engineer a second reduction system or run a huge outer crank sprocket.

Your point is with smaller chain and more teeth you can get a sprocket diameter in-between what a tooth on 410 has, but it doesn't change the actual reality of gear ratio, that is the inside U diameter of the sprocket the chain rides in.

Yes, 410 sprockets have longer and fatter teeth, enough to add what, ~2mm to the sprockets outside tooth end diameter measurement, or are you saying the smaller tooth size is enough for a 1/4" reduction in overall outside diameter sprocket size which sounds pretty close?

I see that, I just want to make it clear that the inner U circle diameter of sprockets determines ratio, not what connects them.

For a guy who claims "Your grasp of this simple fact is clouded with your perception that tooth size or count means anything in ratio."
you sure do a great job painting yourself in ultracrepidarian colors.

I was one of the first people to shift-kit a 4G back in 2010, and I've put nearly 10K miles on it since. I've played with a _lot_ of gear ratios.
It is of course your right to think I don't know what I'm talking about. But I've hashed it, rehashed it, done it, and I'm wearing the damn t-shirt.

Good day to you.
 
I was thinking about this last night...

Chain size and teeth count is meaningless in the reduction between 2 circular gears or pulleys, it this their diameter that matters.
Be it a smooth belt, a bunch of little teeth or a handful of big teeth does not change the reduction, only sprocket diameter changes gear ratio.
.
You are just plain wrong.
Teeth count on sprockets is the only thing that matters to ratio.

Diameter on toothed sprockets is irrelevant to gear ratio.

A 20 tooth sprocket driving a 100 tooth will be a 5 to 1 ratio no matter
what diameter the 2 sprockets are.

Also the chains could be 1/4" pitch, 3/8 pitch or 1/2" pitch and of course
the ratio would still be 5 to 1 even though the diameters would be different.

However on pulleys using smooth belts diameter is what makes your ratio.

You need to use the gear ratio calculator and lay off the booze at night!
 
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