Need setup advice

[BrownStainRacing]

It's a 12T in the front and I'm not sure about the rear. I believe it's a big 72T.

For the cart, I don't see why a 60T 30 series wouldn't fit. It's 7.28" compared to the 7" that's on it now. It's not close to the ground, however a large stick or rock could hit it. I don't think anything normally in my yard would.

The issue is that I'd have to run a 12T drive sprocket (10T doesn't exist for 35 chain), so it'd have a 5/1 ratio. If you think that would work, I could order a new axle and have it running by next weekend. I'd rather swap the axle for ~$100 and have the freedom of adjustability. The saved time would be cheaper than my time + a welder.

I wouldn't trust a #35 chain and sprockets. There's a reason that heavy kart came with a #428. I would trust a #41, it's the smallest of the .500" pitch chains.

 

[joshw0000]

10t 35 chain c-sprockets for t/q exist unless you buy one with a 3/4 driven.. View attachment 136962

The Predator 212 I have is 3/4" driven.

 

[Thepartsguy]

The Predator 212 I have is 3/4" driven.

Huh? You buy an eBay t/q with either I thought? The only one you can’t buy is a 1” driven? I just figured you typed in what you wanted. I’ll have to recheck eBay.. but could of swore they came in both 3/4 and 5/8 driven...

 

[Thepartsguy]

The Predator 212 I have is 3/4" driven.

Can assure you there 18$ and you will need a 5/8 c-sprocket and required hardware to make this 5/8 driven work on a predator with a 3/4 driver.. edit: I read your post as they don’t come with 3/4 driven.. not you already have a 3/4 driven. sorry I thought you were saying they don’t make’em and I was like wait a minute...

 

[joshw0000]

Can assure you there 18$ and you will need a 5/8 c-sprocket and required hardware to make this 5/8 driven work on a predator with a 3/4 driver.. edit: I read your post as they don’t come with 3/4 driven.. not you already have a 3/4 driven. sorry I thought you were saying they don’t make’em and I was like wait a minute...View attachment 136963

Usually the T/C comes with a 10T and 12T sprocket. The 12T is for 30 series and the 10T is for 40 series.

 

[BrownStainRacing]

Usually the T/C comes with a 10T and 12T sprocket. The 12T is for 30 series and the 10T is for 40 series.

Correction, the tav itself is a 30 series, that fits small block engines with a 3/4" crankshaft. A 40 series tav is for big block engines that have a 1" crankshaft.
The 12t sprocket is for #35 chains and sprockets, the 10t sprocket is for 40/41/420 chains and sprockets.

 

[BrownStainRacing]

Well I'm back to where I started with no good direction to go. I have some choices but don't like any of them.

I can't fit a 60T sprocket. I found a 45T 40 series with 58mm bore that SHOULD fit my axle and not require any additional cutting/welding. With a 10T clutch sprocket, that's only 4.5/1 ratio. Somewhat better than I have now but I still don't know if that's enough to be fun/drive-able.

I found a 60T 35 series sprocket that SHOULD fit but I can only find a 12T clutch sprocket so that would be 5/1 ratio. This sprocket doesn't have a 58mm bore so I'd ultimately end up buying a new axle and other parts to mount the brake rotor and sprocket. The largest bore I could find is 51mm.

If I use a 60T 40 series sprocket with 10T clutch I MAY have to buy a new axle. The largest bore I could find is a 54mm. I could potentially grind it out to fit if the mounting holes line up. In order for that to work, I'd have to cut my frame and weld a supporting bracket. Alternatively, I could cut and move these back a couple inches. Again, neither of those are ideal.

What would you do?

Here, you say you found a 45t for 40 chain that fits the old sprocket bolt pattern and does not interfere with the frame. If that's the case, this is an ez fix.
45t/8t will be a 5.625:1 gear, this is the best so far. You jus need a sprocket spacer to move the new sprocket over to line up with the tav sprocket.
Am I wrong, or confused???? Maybe both???

 

[Thepartsguy]

Usually the T/C comes with a 10T and 12T sprocket. The 12T is for 30 series and the 10T is for 40 series.

I’m running a 14t 40 pitch CHAIN not series t/q sprocket. Your thinking the chain pitch is a series if I read the last couple posts right. There is 35 pitch chain 40 or 420 pitch chain. You can goof up and make a 41 pitch chain setup that won’t work to well? and so on... a 30 series t/q with a 3/4 driven can use ANY 3/4 whatever chain pitch c-sprocket.. and 5/8 can of course use any 5/8 whatever chain pitch c-sprocket. Edit: you can’t use a 30 series t/q belt on a 40 series t/q or vice verse. Here is the 14t 420 pitch sprocket I run on both modified 8hp’s.. it’s 5/8 bore

 

[BrownStainRacing]

Here, you say you found a 45t for 40 chain that fits the old sprocket bolt pattern and does not interfere with the frame. If that's the case, this is an ez fix.
45t/8t will be a 5.625:1 gear, this is the best so far. You jus need a sprocket spacer to move the new sprocket over to line up with the tav sprocket.
Am I wrong, or confused???? Maybe both???

Something like this that fits over your axle with same bolt pattern as your old sprocket. Thickness will have be where your tav sprocket ends up at.
A good machine shop can make this part for you, off your old sprocket. Then jus use longer bolts to bolt it to the hub. I would keep the old sprocket in its place to give spacer and new sprocket more surface area, contact patch, to hold to. Make sense???

Black Aluminum Rear Sprocket Pulley Spacers 1984-1999 Harley | eBay

Find many great new & used options and get the best deals for Black Aluminum Rear Sprocket Pulley Spacers 1984-1999 Harley at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[Thepartsguy]

Something like this that fits over your axle with same bolt pattern as your old sprocket. Thickness will have be where your tav sprocket ends up at.
A good machine shop can make this part for you, off your old sprocket. Then jus use longer bolts to bolt it to the hub. I would keep the old sprocket in its place to give spacer and new sprocket more surface area, contact patch, to hold to. Make sense???

Black Aluminum Rear Sprocket Pulley Spacers 1984-1999 Harley | eBay

Find many great new & used options and get the best deals for Black Aluminum Rear Sprocket Pulley Spacers 1984-1999 Harley at the best online prices at eBay! Free shipping for many products!

www.ebay.com

exactly what I did to solve multiple problems on an open axle kart before I swapped to a live axle. I had no extra parts at the time so a new hub and all was not an option. the bolt pattern of the sprocket I purchased did not match this hub. I drilled the new sprocket to match and used stacked nuts as spacers.. and bolted the sprockets together.. that pushed the sprocket wayyy over and allowed the bigger rear tires to clear the hub made for small yardkart wheels.. it was a 40 chain sprocket bolted to the welded on sprocket on this hub..

 

[BrownStainRacing]

exactly what I did to solve multiple problems on an open axle kart before I swapped to a live axle. I had no extra parts at the time so a new hub and all was not an option. the bolt pattern of the sprocket I purchased did not match this hub. I drilled the new sprocket to match and used stacked nuts as spacers.. and bolted the sprockets together.. that pushed the sprocket wayyy over and allowed the bigger rear tires to clear the hub made for small yardkart wheels.. it was a 40 chain sprocket bolted to the welded on sprocket on this hub..
View attachment 136966View attachment 136967

Yeap, exactly what I thought you getting at earlier today.
And jus think, it only took us all day to figure it out. I don't know about you, but I'm exhausted. I think I'll take tomorrow off, lmao.

 

[joshw0000]

Here, you say you found a 45t for 40 chain that fits the old sprocket bolt pattern and does not interfere with the frame. If that's the case, this is an ez fix.
45t/8t will be a 5.625:1 gear, this is the best so far. You jus need a sprocket spacer to move the new sprocket over to line up with the tav sprocket.
Am I wrong, or confused???? Maybe both???

I think you're onto something. I may give these a go:

45T SPROCKET for #40 CHAIN-
JT Sprockets JTR269.45 45T Steel Rear Sprocket https://a.co/d/fGNe13L

RISER PLATE FOR MOTOR-
Generic Torque Converter Motor Riser Plate for 196cc/212cc Engines on Coleman Mini Bikes https://a.co/d/hEfRfWd

TORQUE CONVERTER-
VEVOR 212CC Torque Converter Kit Go Kart 30 Series 6.5 HP Mini Bike Comet Clutch Set 3/4 Inch 10T #40 or 41 Chain Predator Driver Pulley Replacement Comet TAV2 Go-Kart Torque Converter https://a.co/d/0XUNXrg

8T SPROCKET
Azusa 8 Tooth 40 41 420 Chain 5/8" Bore C Type Sprocket with Keystock https://a.co/d/57bPvgz

#40 CHAIN-
#40 Roller Chain - 10 Feet #40 Chain with 5 Connecting Links for Go Karts, Mini Bikes, Scooters, Motorcycles, Bycicles, ATV, MTV, Dirt Bike and Other Industrial Machinery - 240 Links https://a.co/d/61E1iKz

 

[joshw0000]

I’m running a 14t 40 pitch CHAIN not series t/q sprocket. Your thinking the chain pitch is a series if I read the last couple posts right. There is 35 pitch chain 40 or 420 pitch chain. You can goof up and make a 41 pitch chain setup that won’t work to well? and so on... a 30 series t/q with a 3/4 driven can use ANY 3/4 whatever chain pitch c-sprocket.. and 5/8 can of course use any 5/8 whatever chain pitch c-sprocket. Edit: you can’t use a 30 series t/q belt on a 40 series t/q or vice verse. Here is the 14t 420 pitch sprocket I run on both modified 8hp’s.. it’s 5/8 boreView attachment 136964

I probably worded it wrong. What I meant is a 12T fits a #35 chain and a 10T fits a #40 chain but they're not interchangeable.

 

[joshw0000]

You guys rock! You've went above and beyond to help me figure this out. I'm going to sleep on it and if no one sees any issues I'll pull the trigger on the new parts.

 

[BrownStainRacing]

I think you're onto something. I may give these a go:

45T SPROCKET for #40 CHAIN-
JT Sprockets JTR269.45 45T Steel Rear Sprocket https://a.co/d/fGNe13L

RISER PLATE FOR MOTOR-
Generic Torque Converter Motor Riser Plate for 196cc/212cc Engines on Coleman Mini Bikes https://a.co/d/hEfRfWd

TORQUE CONVERTER-
Torque Converter Go Kart Clutch Set 1" For 10T 40/41 and 12T 35 Chain for Manco Comet TAV2 (30 Series) https://a.co/d/iRqCeY0

8T SPROCKET
Azusa 8 Tooth 40 41 420 Chain 5/8" Bore C Type Sprocket with Keystock https://a.co/d/57bPvgz

#40 CHAIN-
#40 Roller Chain - 10 Feet #40 Chain with 5 Connecting Links for Go Karts, Mini Bikes, Scooters, Motorcycles, Bycicles, ATV, MTV, Dirt Bike and Other Industrial Machinery - 240 Links https://a.co/d/61E1iKz

That's the wrong tav, you need 1 for a 3/4" crankshaft. Also, why the riser plate??? You seeing interference in something???? I'm not saying you dont need it, jus wondering what you are seeing.

 

[BrownStainRacing]

I think you're onto something. I may give these a go:

45T SPROCKET for #40 CHAIN-
JT Sprockets JTR269.45 45T Steel Rear Sprocket https://a.co/d/fGNe13L

RISER PLATE FOR MOTOR-
Generic Torque Converter Motor Riser Plate for 196cc/212cc Engines on Coleman Mini Bikes https://a.co/d/hEfRfWd

TORQUE CONVERTER-
Torque Converter Go Kart Clutch Set 1" For 10T 40/41 and 12T 35 Chain for Manco Comet TAV2 (30 Series) https://a.co/d/iRqCeY0

8T SPROCKET
Azusa 8 Tooth 40 41 420 Chain 5/8" Bore C Type Sprocket with Keystock https://a.co/d/57bPvgz

#40 CHAIN-
#40 Roller Chain - 10 Feet #40 Chain with 5 Connecting Links for Go Karts, Mini Bikes, Scooters, Motorcycles, Bycicles, ATV, MTV, Dirt Bike and Other Industrial Machinery - 240 Links https://a.co/d/61E1iKz

The description for that sprocket says it's a #428. I'm not sure it'll work with that 8t sprocket.

 

[joshw0000]

That's the wrong tav, you need 1 for a 3/4" crankshaft. Also, why the riser plate??? You seeing interference in something???? I'm not saying you dont need it, jus wondering what you are seeing.

Thanks, good catch. I fixed it.

I can bolt the riser to my existing plate to get the motor where I need it so it'll line up with the rear sprocket. With it having a little set back, I'm hoping it will land the engine further back so the 8T lands over the 45T. If not I'll have to cut the frame and weld a support so the chain can pass through it.

Is that not what you meant when you mentioned the spacer?

 

[BrownStainRacing]

Thanks, good catch. I fixed it.

I can bolt the riser to my existing plate to get the motor where I need it so it'll line up with the rear sprocket. With it having a little set back, I'm hoping it will land the engine further back so the 8T lands over the 45T. If not I'll have to cut the frame and weld a support so the chain can pass through it.

Is that not what you meant when you mentioned the spacer?

A Riser would not be a bad idea. As for the sprocket spacer, it's jus gonna move the axel sprocket over so the chain lines up with the tav sprocket. If you turn the clutch around where the sprocket is on the inside, that is where the tav sprocket will line up.

 

[BrownStainRacing]

Here is a tav facing forward. If you have room to put it this way, you would not have to worry about cutting the frame.

 

[BrownStainRacing]

I'm wondering if this will allow you to move the motor over to the left far enough to line up with you old sprocket??? I've never had to use 1, so idk. Maybe someone can chime in and let you know how far they allow the engine to move side to side.
If this would work, you wouldn't need a spacer for the new sprocket.

Engine Swap Kit for Baja DB30, Motovox, Fits Coleman CT100 to 6.5HP Clone

Adjustable Engine Mounting Plate for Predator 212cc Engines. Popular for the Baja Doodlebug DB30 6.5HP, but will work on any Mini Bike, Go-Kart or Trike.

www.ombwarehouse.com