Go Back   DIY Go Kart Forum > Building Plans And Advice > Engines & Clutches

Notices

Closed Thread
 
Thread Tools Display Modes
  #1  
Old 03-21-2019, 07:19 PM
Aircomet's Avatar
Aircomet Aircomet is offline
Junior Member
 
Join Date: Dec 2017
Location: Knoxville, Maryland
Posts: 10
Thanks: 6
Thanked 5 Times in 3 Posts
Default 40 Series backing plate alignment

I know one of the new products that is becoming increasingly popular is the 40 series tc with backing plate kit originally made by gopowersports. Now I see other companies are jumping on the bandwagon on eBay. But one of the major drawbacks I see with this setup (apart from $$$) is the belt alignment issue generated by mounting the driven outboard. This throws the alignment off by almost an inch during shift out.

But, one way I thought of that might solve this would be to mount the drive clutch backwards. This way both clutches now shift in the same direction and belt alignment should be okay. Just wanted to run this by you guys and see if Iím missing something here. It just seems like a simple solution and Iím curious why it hasnít been thought of. Here is a picture I found showing what I mean.
Attached Thumbnails
21746750-EA68-4B90-BE7A-35D46DAAEF43.jpg  
  #2  
Old 04-20-2019, 10:41 PM
67StingrayJ 67StingrayJ is offline
Member
 
Join Date: Jan 2019
Posts: 73
Thanks: 3
Thanked 1 Time in 1 Post
Default

I'm interested in this idea. I hate how I paid over $300 for my 40 series and it's going to rob me of power and chew through belts as a result. here is a video i took showing how much the thing moves from side to side.

  #3  
Old 04-21-2019, 12:34 PM
Snaker Snaker is offline
Junior Member
 
Join Date: Feb 2019
Posts: 29
Thanks: 0
Thanked 6 Times in 6 Posts
Default

Quote:
Originally Posted by Aircomet View Post
I know one of the new products that is becoming increasingly popular is the 40 series tc with backing plate kit originally made by gopowersports. Now I see other companies are jumping on the bandwagon on eBay. But one of the major drawbacks I see with this setup (apart from $$$) is the belt alignment issue generated by mounting the driven outboard. This throws the alignment off by almost an inch during shift out.

But, one way I thought of that might solve this would be to mount the drive clutch backwards. This way both clutches now shift in the same direction and belt alignment should be okay. Just wanted to run this by you guys and see if Iím missing something here. It just seems like a simple solution and Iím curious why it hasnít been thought of. Here is a picture I found showing what I mean.
I say by all means give it a try. I don't know if all these Comet and replica's and copies have the same dimensions so it is up to the installer to determine if it will mount properly backwards. It doesn't matter for user function.

The obvious best fit on a symmetrical CVT is having the pulley's fixed sheaves on opposite sides of the belt, one way or the other. The backplate gets in the way when mounting the driven pulley with the movable sheave inboard. I believe that is why the manufacture's use a asymmetrical design for the 30 series incorporating the backplate. That allows both pulley fixed sheaves to be inboard. Problem is the belt grip has to be less than that of a symmetrical design, which would also limit the power transmission of that design.

Also, don't underestimate the benefits of having a backplate. It alleviates installation difficulties such as center-to-center dimensions, belt length, pulley parallelism, pulley lateral alignment. All that is done for you.
  #4  
Old 04-24-2019, 04:05 PM
67StingrayJ 67StingrayJ is offline
Member
 
Join Date: Jan 2019
Posts: 73
Thanks: 3
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by Snaker View Post
don't underestimate the benefits of having a backplate. It alleviates installation difficulties such as center-to-center dimensions, belt length, pulley parallelism, pulley lateral alignment. All that is done for you.
You have a point there. That is the sole reason I initially opted to go for a 40 series with the backplate. I still believe it's possible however to mount the two pulleys correctly and utilize a back plate. I intend to give it a try soon.
  #5  
Old 05-02-2019, 08:10 PM
67StingrayJ 67StingrayJ is offline
Member
 
Join Date: Jan 2019
Posts: 73
Thanks: 3
Thanked 1 Time in 1 Post
Default

OK guys, question. Can I have the drive pulley mounded reverse with appropriate spring?
  #6  
Old 05-02-2019, 08:26 PM
itsid's Avatar
itsid itsid is offline
Moderator
 
Join Date: Jul 2013
Location: Ruhrpott [Germany]
Posts: 10,371
Thanks: 1,409
Thanked 4,370 Times in 3,288 Posts
Default

40 series driver pulleys do not care which direction they spin in order to engage the clutch or contract the sheaves..
it'll work as well CW as it would CCW

'sid
__________________
Jokes about german sausage are the wurst.
  #7  
Old 05-13-2019, 04:05 PM
67StingrayJ 67StingrayJ is offline
Member
 
Join Date: Jan 2019
Posts: 73
Thanks: 3
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by itsid View Post
it'll work as well CW as it would CCW

'sid
Um... What? CW? CCW??? Clockwise Wound and Counter Clockwise Wound?
  #8  
Old 05-13-2019, 04:17 PM
JTSpeedDemon's Avatar
JTSpeedDemon JTSpeedDemon is online now
Currently flathead-crazed
 
Join Date: Jan 2019
Location: Texas
Posts: 2,727
Thanks: 655
Thanked 373 Times in 343 Posts
Default

Uhmm,
CW= ClockWise
CCW= CounterClockWise
__________________
King of Controversy
  #9  
Old 05-14-2019, 06:14 AM
LightningTeg's Avatar
LightningTeg LightningTeg is offline
Member
 
Join Date: Sep 2018
Posts: 75
Thanks: 8
Thanked 16 Times in 13 Posts
Default

Can confirm the driver can be mounted either way but it depends on the kit you got. The picture in original post shows the kit where driver must be mounted inboard.
  #10  
Old 05-31-2019, 12:02 PM
Grumpygregg Grumpygregg is offline
Junior Member
 
Join Date: May 2019
Location: Vita manitoba
Posts: 11
Thanks: 4
Thanked 0 Times in 0 Posts
Default

Turn the clutch on the motor around that will solve your problem. The moving plates work opposite of each other to keep belt centered.
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:15 PM.