Noob belt question
 

Hi. I've got a Carter spx with a comet 20(?) converter. I noticed the old 1/2" w belt was damaged, so I amazoned a replacement using the part number on the old belt. I received the new belt and its 3/4" w. In fact, when I search other vendors using the old part #, all the belts are 3/4" or wider than the original. For the heck of it, I installed it on the cart, and it makes it move at idle... Any advice/thoughts would be appreciated!

u need to adjust the motor . there should be a gap on the belt and driver pulley i thank its like 1/8" when you squeeze the belt around the shaft .

http://www.doityourself.com/stry/how...nverter-belt#b

Hey, thanks... I'll try this. I just want to make sure I've got the right replacement belt first. The new belt is the same diameter as the original, but it's wider. Seems to fit into the pulleys alright, tho. Just want to make sure it's alright to use, then I'll adjust the motor. Thx again.

if the old belt is 1/2" then there is 1/4" of wear on that belt . im surprised
it hasnt shredded. all the 20 and 30 comets use 3/4 belts the only diffrence in these belts are the lengths witch you measure the shaft to shaft distance . but i would say your good there just need to move the motor to get it set up right

About 4 of the teeth were gone. I thought these belts would wear at the teeth area... Never thought they'd wear width wise. It's almost like someone trimmed it.

Yeah they wear on the sides . Torq converters work by squeezing the side of the belt and making it Climb the sides of the pulley to change the gear ratio witch gives you a low range for take offs and climbing hills and a high range for top speed

Interesting. Appreciate your input. Wish it was easier to adjust, but at least I don't have to reorder a belt.

Hey, thanks! It worked. Very helpful link. Next question is, do I now need to adjust the drive chain?

I stand corrected
 

I stand corrected. Adjusting the engine doesn't seem to affect the distance between the pulleys. It only seems to loosen or tighten the chain.

Probly going to need some pics . Sounds like u have the set up that's not adjustable . Also is there a brass bushing on the motor side that the belt rides on when idealing . If there is it needs some dry lube like graphite .

here's a pic
 

Thanks for sticking with me, dragon. I uploaded a pic of my set up. I don't see an idle bushing. Looks like the belt just goes pulley to pulley.

Your belt looks loss enough but it does look like your missing the bushing .
http://www.mfgsupply.com/gomini/gomi...s/200349a.html

It's #10 in the diagram

There's a bushing there behind the pulley, but I don't see how the belt would sit on it at idle. I'll post another pic.

here's a another pic
 

Different view. This set up worked until I put on the new belt.

difference in belts
 

Old on left, new on right

Oh any btw u have comet 30 asymmetrical The comet 20 is a symmetrical system
Also what's the old belt part # I can barely read it

Gotcha. My fault. Belt # is 203589df

I'm pretty sure the bushing is for when the driver is under load and the belt has pulled down into the Low range of initial acceleration. at idle, the belt should just sort of bump and hang just above the shaft/bushing without grabbing.

As far as adjustment goes, if you need to change the C-2-c of the driver/driven pulleys, you need to loosen the jackshaft AND engine mount bolts and shift the jackshaft back. A lot of times, there's very little room to do so. You have to be careful with the realignment of the pulleys, beign a little off will chew up a belt pretty fast.

Thanks for your input. I think dragon is right. I think it's the right belt, but the idle bushing is missing and is probably causing the problem. I don't get how it ran ok missing this bushing with the old belt, but I've got this part on order. Wouldn't it be nice if it was easy as this?

here is a little info as far as belts go . and i was right there is no adjustment on that back plate so u have to have the right belt and that bushing .
here is the source site https://www.*****************/tcbelts.htm


Asymmetric 30 Series 3/4" Top Width Belts

Ignore the Letters A, C or DF Printed on Some Comet Belts, Match the Numbers Only

Part Number
Description
Center Distance
O.C.
Price
Add to Shopping Cart
6" Driven
7" Driven
12-8487
BELT 203589A
6 5/8 to 6 11/16
NO FIT
27.00
24.95


5959
BELT 5959
6-15/16 to 7
NO FIT
27.40
29.95


Belt #5959 is a Custom Belt by Manco/American Sportworks. Fits Go Kart Model 285, 286, 485, 486 & 606.
12-13053
BELT 203590A
7 1/8 to 7 3/16
6 1/4 to 6 5/16
28.32
26.95


12-10052
BELT 203591A
7 9/16 to 7 5/8
6 13/16 to 6 7/8
29.28
24.95


Comet Belt #203591A is also known as Yerf Dog Belt #Q43203W and Kartco Belt #7655.
12-13243
BELT 203592A
8 3/16 to 8 1/4
7 5/16 to 7 3/8
30.25
26.95


12-13050
BELT 203593A
8 11/16 to 8 3/4
7 3/4 to 7 13/16
31.23
26.95


Comet Belt #203593A is also known as Manco Belt #8192. Fits Manco Model 806B, 806-01E and 806U.
203594A
BELT 203594A
9 3/16 to 9 1/4
8 5/16 to 8 3/8
32.20
26.95


203595A
BELT 203595A
9 5/8 to 9 11/16
8 3/4 to 8 13/16
33.18
26.95


203596A
BELT 203596A
9 15/16 to 10
9 3/16 to 9 1/4
33.78
26.95


12-10042
BELT 203597A
10 3/4 to 10 13/16
9 13/16 to 9 7/8
35.14
29.95


Comet Belt #203597A is also known as Murray Go Kart Belt Number 37 x 98
203598A
BELT 203598A
11 11/16 to 11 3/4
10 15/16 to 11
37.11
29.95


203599A
BELT 203599A
13 1/16 to 13 1/8
12 1/8 to 12 3/16
39.77
32.95



These 30 Series 3/4" top width belts are flat on one side and angled on the other.
The Comet 30 Series has a Green Tension Spring in the driven pulley (rear pulley).


The Letters A, C or DF Printed After the Belt Part Numbers are Not Relevant.
The 20 and 30 Series Driven Pulleys Both have a #20 Stamped in Plain View.
The Number 20 Stamped on the Driven Pulley is NOT a Series Indicator at all.

still not working
 

Ok. I installed the missing brass belt bearing and I've still got the problem. When I start the cart, the belt slips on the bearing, then as far as I can tell, once the clutch gets spinning it locks and the cart bucks forward.

here's a pic
 

Here's of a pic. Thx in advance for any help!

if you're not giving it gas and the belt is engaging, then your idle might be set too high.

Hey, thought of that too. Don't think I can get it to idle lower than it is. Will take a look at that again tomorrow. I'm getting &%$# frustrated!

idle is not adjustable
 

Hey. I down loaded the manual and looked over the carb and the idle seems to be set at the factory and not adjustable. It still moves/engages at idle, but runs great other wise. Any other ideas are appreciated!

I don't know if you found this already or not, but this is a breakdown of all the parts on the Carter SPX 2936.

http://kartingdistributors.com/pdfs/.../2936-4015.pdf


Your new belt looks correct to me in the pictures. Make sure you have the belt installed in the correct direction. I'm pretty sure you know this, but the TC 30 belt is angled on one side, and should not be put on backwards.

We own a few Carter SPX karts. We didn't run them this year, but I can look at our karts this weekend for a comparison to your pictures if you'd like.

If it is too frustrating to figure out your problem, you could have a bad or worn torque converter set up. Perhaps a previous owner messed with the springs. New, complete TAV 30 / TC30 units run about $100 on ePay. Your chain should be #40. They're not Comet units, but they should be just fine. I'm not sure if Comet is still around.

Luke

Luke, thanks for your feedback. Please check out your carts this weekend and let me know. Any chance an over tight chain could be the problem? I've got a feeling it's a bad tc as well, but I'm hoping to avoid spending the $$. It runs great except for this problem.

Your belt is correct. Your setup also looks like mine. I don't think adjusting the chain will make a difference.

I'm pretty sure your hub TC needs to be disassembled and cleaned. Videos like this will guide you:

https://www.youtube.com/watch?v=C9yPHtfJO9w

Here is a manual for the comet:

http://www.*************/PDF/Comet_TA..._Converter.pdf

Try cleaning the TC setup.

Thanks!!! Video will be super helpful. Is there an easy way to know if the comet unit needs replacing vs. Just needs to be cleaned up? Or is it something where I'll clean it up and if it still doesn't work=replace it. Also, is there a comparable product to the comet lube? That stuff is expensive!

While your cleaning everything inspect everything, make sure the inside if the pulley is smooth and doesn't have any steps in it, no flat spots in the rollers things like that

Will do. Thx for the help!

I didn't buy Comet lube when I cleaned ours. I don't remember what I used. I think it was just something off the shelf. You can try searching other youtube videos about cleaning TCs. Maybe another one will give you an alternative choice for lube.