Our First Two Carts

[Blazkowiez]

The motor should sit flush to the back jack shaft, you should see 2 holes drilled centrally where it was positioned from stock.

No, a LONGER belt is not needed. There is a way to use the belt you ordered as it will be the correct one for your kart and will be cheaper in all instances. The 203591 and 203589 belts are the 2 most common belts from the Comet series of production, therefore these had mass production, given these cost a very small amount compared to all other Comet belts now.

The price difference was only 3 dollars 2 years ago, now the different may be 20-30 or more.

 

[Hybrid]

Oh well this belt cost more than any of the others on BMI Karts. It doesn't fit. The motor is completely butted up against the jackshaft and it can not be any closer. I will take pictures tomorrow to show you what I mean. I don't see how I could be doing anything wrong, I put the belt on and try to roll the cart and it catches on the clutch and turns the motor. I can't even start the kart or it will drive away from me. The clutch is completely disengaged and the belt is too tight around it. I don't know how else to make that belt work. I'm assuming that the jackshaft and or engine was swapped at one point for a different one and the new one was not the same. I'll take pictures to varify later. The chain is also pretty sung and the jackshaft is moved as far ahead as it can be. Everything is as close as possible, and nothing fits. I say the chain is okay, but it needs a "bigger" belt because the 203591 is too small. It is a lot tighter when it is sitting there than on the Carter, they should be roughly the same tension, no?

 

[Blazkowiez]

The two belts should roughly be the same on your carter and the yerf-dog in terms of tightness, both should have the ability to be squeezed. You are correct with this. I agree, they may have altered something along the line to where you may require the 203593 belt. Throw up some pictures so we can be 100% sure.

 

[Daveon]

Yerf Dog manual link
http://www.yerf-dog.com/manuals.html

 

[Daveon]

Model 3203

 

[Hybrid]

Is there any way I can take a cutoff wheel to the jackshaft and cut notches so I can move the motor back closer to it to get less distance between the pulleys? I don't see how it could hurt it...

 

[Blazkowiez]

Dude, if you have a 7" driven and it is a 6.0hp Tecumseh there should be no way it is not back enough to work with a Comet 203591 belt. The measurements would be correct...

On rare instances you will need an aircraft washer in your drive clutch to prevent constant engagement. A single washer may be all that is necessary, the deal is that the clutch needs to be able to open fully, the washer's outer diameter should be no larger than the hub so that it can slide fully into the clutch when engaged.

 

[Hybrid]

Haha, I'm telling you its too small, it is going to be raining tomorrow so I'll take pics when I can.

I am determined to figure this out.

 

[solomon]

Blazkowiez, these karts were used, it is very possible it has mixed parts.

 

[Blazkowiez]

I'm fully aware of that. Go back to his first page and look at the kart. Both the engine and mount plate are stock. Something is wrong here, there is a spacing issue under the motor, there is a spacing issue in the drive clutch, or there is a belt issue.

 

[Daveon]

Is the engine laying directly on the jackshaft plate or are there spacers in between the two?

 

[Hybrid]

Its laying right on top. no spacers at all. Was raining when I went home for lunch, hopefully okay weather soon so I can take it apart and take some pictures.

BMI said I can't return the belt because I mounted it already - How am I supposed to know its the wrong one if I don't mount it? helllllllooooo. Oh well, with how much it would cost to ship it back, restock it, and ship a new one it will equal the cost of the belt so i'm going to keep it regardless of if it works or not.

 

[Hybrid]

 

[Hybrid]

I know the sprocket was changed at one point by the previous owner. So the chain is loose on the bottom, but I don't think it should be a problem riding it unless you think it it will break from the tension on the top.

Any ideas on bringing the engine closer to the jackshaft? I'm just going to buy a bigger belt.

 

[Blazkowiez]

Your chain is loose at the bottom because it is worn out, not because the sprocket was changed. I'm confounded by your situation here, the 203591 belt is the correct belt, you do not need to move the engine closer, you have the correct drive/driven. A loose chain will not ride correctly and will wear down your sprockets forcing you to replace that sprocket again. I'm so annoyed by this now, the belt they sent you was a 203591 belt that says 203591? Measure that **** thing. Compare the total length to the chart, make sure it is real.

 

[Hybrid]

The length I measured from center to center is 7-5/8". I'll check the belt when I get home

 

[Blazkowiez]

I measured the dog I was working on today at the shop just to check how many of these measure, it matched the charts. You have no freaking idea how badly I want to look at this kart.

 

[Hybrid]

They measured between 6-13/16 and 6-7/8?

That would make the clutch and the driven VERY close to each other I would guess seeing as how mine are very close as they are now. I'll take another pic and measure again tomorrow.

 

[Hybrid]

Yeah I'm just going to buy the belt that matches with the chart so i can finally ride this thing. Running out of things to fix on it haha its already welded the cage back together twice, aboutthe weld the floor back on, fixed the seat, fixed the front wheel, gotta put the seat belts on, put all new bolts all the way around, got the engine to purr, need ot put the brake band on, and then i just need the right belt.

 

[Hybrid]

Yeah, I'm back. I've got the Yerf-Dog all fixed up and ready to go - only problem is is the belt situation is still messed up. I'm measuring 6 - 3/4" right now which is less than what i should need for the belt, but the belt rubs so much on the clutch when I try to start it, it catches (even when I roll it, it turns the engine over) Thus telling me the belt is too tight.

Argharghargharghargh any input?