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

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 02-02-2020, 02:31 PM
imjustjoshinnn's Avatar
imjustjoshinnn imjustjoshinnn is offline
go fast go fast go fast
 
Join Date: Oct 2019
Location: Connecticut, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default What's the advantages and disadvantages of different types of sprockets?

This may sound like a stupid question but I'm curious. I have three different sprockets lying around that could fit my go kart. I'm not too knowledgeable of what kind of difference it would make to use a different sprocket than the one I've had since I bought my go kart. Some of the sprockets have more teeth and some have less and that's about all I know. If anyone could tell me the advantages and disadvantages of different kinds of sprockets that would be great.


(btw my go kart has a 212 predator with a stage 1 performance kit from gopowersports. It uses a torque converter. I'm not sure of the horsepower, but before the stage 1 kit it was around 6-6.5 horsepower.)

Reply With Quote
  #2  
Old 02-02-2020, 02:38 PM
JTSpeedDemon's Avatar
JTSpeedDemon JTSpeedDemon is offline
2019 Build Off Winner!
 
Join Date: Jan 2019
Location: Texas
Posts: 3,415
Thanks: 774
Thanked 526 Times in 478 Posts
Default

More sprocket teeth = better acceleration, lower top speed
Less sprocket teeth = less acceleration, higher top speed

Don't go with too few teeth, or your clutch will die.
__________________
Currently Flathead-Crazed
Reply With Quote
The Following User Says Thank You to JTSpeedDemon For This Useful Post:
imjustjoshinnn (02-02-2020)
  #3  
Old 02-02-2020, 02:40 PM
imjustjoshinnn's Avatar
imjustjoshinnn imjustjoshinnn is offline
go fast go fast go fast
 
Join Date: Oct 2019
Location: Connecticut, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by JTSpeedDemon View Post
More sprocket teeth = better acceleration, lower top speed
Less sprocket teeth = less acceleration, higher top speed

Don't go with too few teeth, or your clutch will die.
Gotcha. Thanks!
Reply With Quote
The Following User Says Thank You to imjustjoshinnn For This Useful Post:
JTSpeedDemon (02-02-2020)
  #4  
Old 02-02-2020, 11:01 PM
landuse's Avatar
landuse landuse is offline
Moderator
 
Join Date: Nov 2010
Location: Pietermaritzburg, South Africa
Posts: 17,657
Thanks: 2,296
Thanked 3,564 Times in 2,908 Posts
Default

Quote:
Originally Posted by JTSpeedDemon View Post
More sprocket teeth = better acceleration, lower top speed
Less sprocket teeth = less acceleration, higher top speed

Don't go with too few teeth, or your clutch will die.
While you are totally correct, it doesn't help someone who has no idea of what different gear ratios can do to a karts performance.

You cannot just go and put the smallest sprocket on and thing that you are now going to go seriously fast. You have to still have your gear ratio decent enough that the kart will still move.

As a vague rule of thumb, you want to start of with about a 6:1 gear ratio is you have rear wheels of about 13" diameter. That means your axle sprocket has 6 times the teeth of the clutch sprocket. The higher the gear ratio (lower the number), the more strain you put on the clutch and the more likely you are to have an under performing kart (Just think of trying to take off in your manual car when you are in 4th gear).

You also have to make sure that any sprockets you might use are the same type as the clutch sprocket. There are several different types depending on the distance between the tooth tips and the diameter of the sprocket.

There is a lot of info that i have left out, but you should be able to do a quick search on the forum and find everything you need

There is also a lot of info in this thread

http://www.diygokarts.com/vb/showthread.php?t=10036
Reply With Quote
The Following User Says Thank You to landuse For This Useful Post:
imjustjoshinnn (02-03-2020)
  #5  
Old 02-03-2020, 07:33 AM
imjustjoshinnn's Avatar
imjustjoshinnn imjustjoshinnn is offline
go fast go fast go fast
 
Join Date: Oct 2019
Location: Connecticut, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by landuse View Post
While you are totally correct, it doesn't help someone who has no idea of what different gear ratios can do to a karts performance.

You cannot just go and put the smallest sprocket on and thing that you are now going to go seriously fast. You have to still have your gear ratio decent enough that the kart will still move.

As a vague rule of thumb, you want to start of with about a 6:1 gear ratio is you have rear wheels of about 13" diameter. That means your axle sprocket has 6 times the teeth of the clutch sprocket. The higher the gear ratio (lower the number), the more strain you put on the clutch and the more likely you are to have an under performing kart (Just think of trying to take off in your manual car when you are in 4th gear).

You also have to make sure that any sprockets you might use are the same type as the clutch sprocket. There are several different types depending on the distance between the tooth tips and the diameter of the sprocket.

There is a lot of info that i have left out, but you should be able to do a quick search on the forum and find everything you need

There is also a lot of info in this thread

http://www.diygokarts.com/vb/showthread.php?t=10036
Thank you. Your explanation is very helpful and thank you for the resources!
Reply With Quote
Reply

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 09:50 PM.