40 series driven width.

[Dingo9canuk]

Would anyone know the difference between a 30 series driven and 40 series driven pulley width (jackshaft) length? I feel the 40 series is at least 1/2” wider

 

[redflash]

the difference is not width it is.....the 30 series is asymetrical ( flat one side beveled the other side)....and the 40 series belt is symetrical ( same angle on each side.

Da redflash

 

[Dingo9canuk]

the difference is not width it is.....the 30 series is asymetrical ( flat one side beveled the other side)....and the 40 series belt is symetrical ( same angle on each side.

Da redflash

I had a feeling I didn’t explain what I was trying to say. Not the belt width, the width of the hub part that rides on the jackshaft.

 

[Denny]

I don’t think anyone ever bothered to measure that. Ever.

 

[karl]

Please tell me your not trying to mount a 40 series on a tav2 backplate or something similar.

Anyways here ya go. Plus something else you will need.

 

[Dingo9canuk]

I don’t think anyone ever bothered to measure that. Ever.

Please tell me your not trying to mount a 40 series on a tav2 backplate or something similar.

Anyways here ya go. Plus something else you will need.
View attachment 135603

Not at all. I have a 1996 Manco Dingo 9 that came from the factory with a Comet 30 series torque converter. The later models came with the 40 series. I would like to upgrade to a 40 series unit. The jackshaft is 5/8 diameter and I’m not sure if it will be long enough to accommodate the potentially wider40 series driven pulley.

 

[Denny]

In that case I would just get the 40 and then figure out what shaft if any is needed.

 

[madprofessor]

5/8" x 8-1/8" Jackshaft for Torque Converter | 400158-08 | BMI Karts And Parts ............ 8.125"
5/8" Jackshaft for Yerf-Dog Go-Kart | 02014 | BMI Karts And Parts............. 10.5"
5/8" x 11-1/8" Jackshaft | 999158 | BMI Karts And Parts ............. 11.125"
5/8'' Steel Mini Axles / Jackshafts (w/ Keyway) | BMI Karts And Parts .............. U-Pick-A-Length
Pretty much the same options are available in .75" and in 1", I'm not a fan of smaller stuff when I can just as easily have bigger stuff.

 

[MTScott]

Not at all. I have a 1996 Manco Dingo 9 that came from the factory with a Comet 30 series torque converter. The later models came with the 40 series. I would like to upgrade to a 40 series unit. The jackshaft is 5/8 diameter and I’m not sure if it will be long enough to accommodate the potentially wider40 series driven pulley.

Been looking at the dimensions myself...

This PDF here indicates that the driver 3 15/16 from static sheave, to the outside of the nut:

https://www.bmikarts.com/PDF/Comet_40series.pdf

I've also seen reference that it could be 3 7/8, but that might be for the 44 series driver, either way, you're in the ball park.

Your main issue will be if you have a plate based system, in which the plate mounts to the motor, and the jackshaft for the driven is built into it. If you have a plain ol jackshaft, you could just get a new longer jackshaft, but you'll have to make sure the center-center distance of the driver/driven will match up with a belt length.

The 40 series operates a bit different than the 30 as far as sheave/belt movement, so alignment is something you'll have to figure out as well.