780 series driven issue

[Whitetrashrocker]

How can you tell it needs a reverse wound spring? I know very little about these tc’s. When I bought it it said that it came with a outboard spring.

Yes that spring is for an outboard set up. The spring towards the outside of the buggy.
You have it orientated inboard.
Flipping it around cost nothing but time and re setting your belt alignment.

A spring will keep that set up. It just winds the other way so the ramps will be proper to each other.

 

[Gusrat]

780 Series | Comet Clutches

You said a 780 series CVT.
Thats the driver part.
Which driven unit do you have?
Looks like a simple diameter measurement will determine it.

View attachment 159069

The 780 driven

 

[Gusrat]

Yes that spring is for an outboard set up. The spring towards the outside of the buggy.
You have it orientated inboard.
Flipping it around cost nothing but time and re setting your belt alignment.

A spring will keep that set up. It just winds the other way so the ramps will be proper to each other.

Ahhh I see

 

[Whitetrashrocker]

This one looks right but its for a 90d.

Reverse Wound Comet Replacement Spring for 90D Driven Clutch

www.bmikarts.com

 

[Whitetrashrocker]

Maybe bmi could give you some dimensions. Diameter , wire gauge and free length.

The pics of the stock 780 driven spring look identical but wound the other way.

 

[Gusrat]

https://beltpalace.com/comet300021a.html

this one says it’s for inboard mount.

 

[Gusrat]

I think I have it figured out yall, I appreciate all the help yall are awesome. I’ll give you an update when my parts come in. I have weights and springs for my drive so it engages at 2300 rpms. And then obviously the driven spring

 

[Whitetrashrocker]

I would pull your driven apart and double check wind direction.

Glad you got it figured out though.

 

[Whitetrashrocker]

And nice website you found. Ive never heard of them before. Gonna add it to the list.

 

[Kartorbust]

This one looks right but its for a 90d.

Reverse Wound Comet Replacement Spring for 90D Driven Clutch

www.bmikarts.com

I was going to link that spring too until I saw 90D not 770, 780, or 790. I think most of the 700 springs will work, just a pulley diameter difference. Could be wrong.

 

[Gusrat]

And nice website you found. Ive never heard of them before. Gonna add it to the list.

Yes! I hadn’t heard of them either until I started searching for these parts.