Go Back   DIY Go Kart Forum > Building Plans And Advice > Go Kart Discussion

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 06-12-2019, 12:21 PM
BuckStalker BuckStalker is offline
Junior Member
 
Join Date: Jun 2019
Posts: 4
Thanks: 4
Thanked 0 Times in 0 Posts
Default Hammerhead 80t build question

Hi, new to the forum here.

I have a hammerhead 80t that was abused by its previous owner. I got it with the engine not quite mounted in or lined up but got it mounted and lined up with very little effort.
It currently has a duramax 7hp motor in it and a 10t clutch and a 44 tooth sprocket on a live axle. Also, 16 inch rear tires. These are all items it came with. It smoked the clutch within 2 minutes (twice due to my ignorance, I thought it was just a bad clutch so bought one). I've done a little research and discovered how bad that gear ratio is on clutches.
I want to install a torque converter. I bought this for my 11 year old to tool around our yard with, so I'm not looking for anything too fast or pricey.

My questions are:

1) Should I change the rear sprocket to a 6:1 ratio even with a torque converter
2) Is an Ebay tav2 kit going to be ok? It shows a 6 inch drive pulley. Anything I should stay away from with these?
3) Would a tav2 kit and a rear sprocket be all I need based off my description to get this thing running?
4) Any other recommendations or personal experience is greatly appreciated, I've been doing some reading on this site and the people here seem awesome.

Thanks,

Buck
Attached Thumbnails
20190529_085121.jpg  
Reply With Quote
  #2  
Old 06-12-2019, 01:24 PM
JTSpeedDemon's Avatar
JTSpeedDemon JTSpeedDemon is online now
Currently flathead-crazed
 
Join Date: Jan 2019
Location: Texas
Posts: 1,330
Thanks: 197
Thanked 133 Times in 128 Posts
Default

6:1 with a TAV is still a bit tall with 16" tires. Try for 7.2/1 or even 8/1.
7 inch driven pulleys give you a little more wheel torque, but 6 inchers are not wrong.
A TAV and a sprocket should be all you need from what you say.
__________________
Local Bird Engineering Nut
Reply With Quote
The Following User Says Thank You to JTSpeedDemon For This Useful Post:
BuckStalker (06-12-2019)
  #3  
Old 06-12-2019, 02:48 PM
BuckStalker BuckStalker is offline
Junior Member
 
Join Date: Jun 2019
Posts: 4
Thanks: 4
Thanked 0 Times in 0 Posts
Default Thanks

Thanks for the response, I appreciate the help. I can't wait to get this thing running! I might be more excited than my boy
Reply With Quote
  #4  
Old 06-12-2019, 02:58 PM
bthompson224's Avatar
bthompson224 bthompson224 is offline
Senior Member
 
Join Date: May 2014
Location: DFW
Posts: 201
Thanks: 6
Thanked 38 Times in 37 Posts
Default

Yeah, get a 72 or 80 tooth sprocket. It shouldn't have clearance issues, but measure anyway to be sure you're not plowing with it. I have never used one, however several members have used the 30 series TC's from eBay.
Reply With Quote
The Following User Says Thank You to bthompson224 For This Useful Post:
BuckStalker (06-12-2019)
  #5  
Old 06-12-2019, 03:22 PM
mckutzy mckutzy is online now
Senior Member
 
Join Date: May 2008
Location: bc, canada
Posts: 7,057
Thanks: 762
Thanked 1,669 Times in 1,370 Posts
Default

If ground clearance is a problem... might need to build a jackshaft ....itll get the ideal ratio, with the clearance...

Here's a calc that'll help with the ratio's, choose what you have, then add in the others...
Off hand a 10-20-10-44 works out to be a 8.8:1....

https://affordablegokarts.com/pages/...tio-calculator
__________________
10yr+ club..... My current ride- http://www.diygokarts.com/vb/showthread.php?t=5461
Reply With Quote
  #6  
Old 06-13-2019, 02:03 AM
landuse's Avatar
landuse landuse is offline
Moderator
 
Join Date: Nov 2010
Location: Pietermaritzburg, South Africa
Posts: 16,983
Thanks: 1,947
Thanked 3,329 Times in 2,706 Posts
Default

Get a 72T sprocket. and a 10T TC sprocket. The cheap chines TC's are just fine. Make sure you get a genuine belt though, the chinese ones that come with the TC are junk
Reply With Quote
  #7  
Old 06-13-2019, 06:17 AM
BuckStalker BuckStalker is offline
Junior Member
 
Join Date: Jun 2019
Posts: 4
Thanks: 4
Thanked 0 Times in 0 Posts
Default

I'm having trouble finding a sprocket with the center hole the right size for a 40 chain. The sprocket that's on there has a 2 inch center and the bolt pattern is 3 inches. Would you guys recommend changing the hub? I think that's what it's called but forgive my ignorance. It is the part on the axle that the rotor and the sprocket attach to.
Reply With Quote
  #8  
Old 06-13-2019, 06:39 AM
mckutzy mckutzy is online now
Senior Member
 
Join Date: May 2008
Location: bc, canada
Posts: 7,057
Thanks: 762
Thanked 1,669 Times in 1,370 Posts
Default

Yes that is called a hub...

How about some pics of the kart/buggy...
__________________
10yr+ club..... My current ride- http://www.diygokarts.com/vb/showthread.php?t=5461
Reply With Quote
The Following User Says Thank You to mckutzy For This Useful Post:
BuckStalker (06-14-2019)
  #9  
Old 06-13-2019, 07:09 AM
BuckStalker BuckStalker is offline
Junior Member
 
Join Date: Jun 2019
Posts: 4
Thanks: 4
Thanked 0 Times in 0 Posts
Default

OP updated with the only pic I have of it on my phone
Reply With Quote
  #10  
Old 06-13-2019, 07:59 PM
Denny Denny is online now
Canned Monster
 
Join Date: Sep 2014
Location: Mayberry, Indiana
Posts: 1,460
Thanks: 86
Thanked 668 Times in 499 Posts
Default

6 to 1 ratio will be fine with a TAVII and 16" tires. Manco used a higher one than that with 18" tires on the Dingos. Get a Genuine Comet belt.

Denny
Reply With Quote
The Following User Says Thank You to Denny For This Useful Post:
BuckStalker (06-14-2019)
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 08:04 PM.