Denny
Canned Monster
If you can get away with dinging the tube to make it fit you can do that. But it sounds like you have a plan.
Clutch erratic engagement? 420 with Series 40
- Thread starter atholon
- Start date
I got the new sprocket/chain on and it definitely helps. Thanks for the suggestion. The 10T/60T barely fit with the chain but they fit.
I think there's still a bit of a jerk of I give it too much gas too quickly. I really have to ease on to the gas starting on a hill. I'm going to see if I can rig up my phone to record what is going on back there when I'm driving it.
I think there's still a bit of a jerk of I give it too much gas too quickly. I really have to ease on to the gas starting on a hill. I'm going to see if I can rig up my phone to record what is going on back there when I'm driving it.
Denny
Canned Monster
Genuine Comet belt?
Rat
Well-known member
Comet belts simply cannot be mistaken for any other...
Denny
Canned Monster
Make sure the shieves are clean and weights lubed with dry lubricant like graphite.
Denny
Canned Monster
That’s probably your shudder.
I'm back! Lol.
Not sure I have the same exact problem but it seems similar. Here's a summary of what I've done:
- Replaced the sprocket with a 60 tooth sprocket on the axel (#40 chain)
- Replaced the sprocket on the jackshaft with a 15 tooth sprocket (#40 chain). I tried a 10 tooth but it put the chain too close to some bushings I need for spacing the sprocket.
- Replaced the driven pulley with a 40 series Amazon special
- Replaced the driver pulley with a 40 series Amazon special (this did seem to work for a while until it seized and then we were back to this grinding sound)
- Replaced the driver pulley with an original comet 40 series driver (grinding garbage started again here)
- Replaced the belt with an original comet belt
I'm at my wit's end here.
I'm wondering if the #40 isn't strong enough and stretches when it is stressed so that it doesn't line up with the sprocket teeth. As soon as I hit the gas and it is already moving there is no problem.
I did some googling in the Crossfire 150 and it looked like it may have used #50 chain/sprockets. I saw some recommendations for using 520 chain/sprockets too.
Any advice on where to go now?
Not sure I have the same exact problem but it seems similar. Here's a summary of what I've done:
- Replaced the sprocket with a 60 tooth sprocket on the axel (#40 chain)
- Replaced the sprocket on the jackshaft with a 15 tooth sprocket (#40 chain). I tried a 10 tooth but it put the chain too close to some bushings I need for spacing the sprocket.
- Replaced the driven pulley with a 40 series Amazon special
- Replaced the driver pulley with a 40 series Amazon special (this did seem to work for a while until it seized and then we were back to this grinding sound)
- Replaced the driver pulley with an original comet 40 series driver (grinding garbage started again here)
- Replaced the belt with an original comet belt
I'm at my wit's end here.
I'm wondering if the #40 isn't strong enough and stretches when it is stressed so that it doesn't line up with the sprocket teeth. As soon as I hit the gas and it is already moving there is no problem.
I did some googling in the Crossfire 150 and it looked like it may have used #50 chain/sprockets. I saw some recommendations for using 520 chain/sprockets too.
Any advice on where to go now?
Master Hack
Well-known member
Your theory about the chain stretching is not likley. I run #40 on a 800 lb/30 hp pig and the chain never stretches or even needs adjusting.
lf you got an amazon/ebay chain, then all bets are off.
lf you got an amazon/ebay chain, then all bets are off.
This is what I bought: https://www.tractorsupply.com/tsc/product/roller-chain-size-40
Master Hack
Well-known member
Says made in china.
Still its unlikely its stretching or skipping.
It will probably need more frequent adjusting and might not last.
these guys sell the good stuff.
www.nitrochain.com
Still its unlikely its stretching or skipping.
It will probably need more frequent adjusting and might not last.
these guys sell the good stuff.
Premium Roller Chain, Engineering Chain & Sprockets - Nitro Chain
www.nitrochain.com
panchothedog
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Are you really bad at math? You said that you are running a 15 tooth and a 60 tooth. That is 1 : 4. Almost identical to the 10 tooth and 37 tooth, which was
1 : 3.7 . A little better, but not much. You NEED to be 1 : 6. What ever the clearance problem is with the 10 tooth sprocket you need to figure out a way fix it. A 15 X 60 is not going to cut it, especially with the size of your tires. Your gear ratio is just too high. Change the spacer brushing to a smaller outside diameter. There is absolutely no reason a 10 tooth sprocket can't be used on your kart.
1 : 3.7 . A little better, but not much. You NEED to be 1 : 6. What ever the clearance problem is with the 10 tooth sprocket you need to figure out a way fix it. A 15 X 60 is not going to cut it, especially with the size of your tires. Your gear ratio is just too high. Change the spacer brushing to a smaller outside diameter. There is absolutely no reason a 10 tooth sprocket can't be used on your kart.
panchothedog
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You are running an ordinary plate style torque converter. It was designed to run with and sold with a 10 tooth sprocket.
I couldn't find anything small enough to provide the space and not have the chain run on top of it. No bushings I could find were that thin with a 3/4" inner diameter. I'm new to this and obviously not a mechanic/fabricator so not sure what other alternative to use.
Denny
Canned Monster
Time for us to see some pictures! Pancho is 1000% right on about the gear ratio listen to him.
Denny
Canned Monster
Comet drive belt, 10 tooth sprocket and more pictures of the clutches and rear tires.
ezcome-ezgo
G'me sumthin to write on
Move the axle back or modify the frame.