General Harley Davidson Chat Forum to discuss general Harley Davidson issues, topics, and experiences.
Sponsored by:
Sponsored by:

Throttle stop screw rattles downward

Thread Tools
 
Search this Thread
 
  #1  
Old 08-03-2017, 11:44 AM
Joshus41's Avatar
Joshus41
Joshus41 is offline
Banned
Thread Starter
Join Date: Jul 2015
Location: Bali
Posts: 83
Likes: 0
Received 3 Likes on 3 Posts
Default Throttle stop screw rattles downward

Hey yall.

The last two couple days were my first days ever on my harley. When i started the bike i used the throttle stop screw on the carb to keep the idle up and not stall the bike for the first few miles. I gradually would loosen it to allow the throttle to close more and more, but I kept noticing I had to keep loosening it.i eventually figured out the screw was actually vibrating downward and threading in further with the throttle open. I heard of people using loctite to stop this, but if i did that how would i rotate the screw manually on the first few miles of warmup? I also want to know if theres a bigger headed screw i can get, possibly with a plastic **** on it, so its easier to rotate the screw by hand on the fly.

Also for what its worth the carb is a mikuni tm40

Thanks yall.
 
  #2  
Old 08-03-2017, 12:28 PM
RHPAW's Avatar
RHPAW
RHPAW is offline
Seasoned HDF Member
Join Date: Aug 2007
Location: Driftless Area
Posts: 20,722
Received 13,867 Likes on 6,240 Posts
Default

Remove the screw, put a small spring over it and re-install.
 
  #3  
Old 08-03-2017, 01:01 PM
Uncle G.'s Avatar
Uncle G.
Uncle G. is offline
Seasoned HDF Member
Join Date: Jun 2010
Location: Upstate New York
Posts: 9,190
Received 3,708 Likes on 1,992 Posts
Default

Try using the throttle stop screw on the throttle grip instead.
 
  #4  
Old 08-03-2017, 02:13 PM
Cygnusx51's Avatar
Cygnusx51
Cygnusx51 is offline
Ultimate HDF Member
Join Date: Oct 2011
Location: Olean, NY
Posts: 5,691
Received 1,647 Likes on 1,076 Posts
Default

Can't you run it with the choke partially pulled out?
 
  #5  
Old 08-03-2017, 04:53 PM
Uncle G.'s Avatar
Uncle G.
Uncle G. is offline
Seasoned HDF Member
Join Date: Jun 2010
Location: Upstate New York
Posts: 9,190
Received 3,708 Likes on 1,992 Posts
Default

Originally Posted by Cygnusx51
Can't you run it with the choke partially pulled out?
You can if you're using the Harley choke cable with the Mikuni. If you're using the Mikuni choke cable there are only detents for "full on" and "full off". The cable won't hold position in between.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
K.P RoadKing
Touring Models
3
06-24-2017 05:25 PM
doggiedave
The General Motorcycle Forum
32
06-16-2009 10:25 PM
kd4tsc
Dyna Glide Models
5
04-29-2009 08:11 PM
khansmith
Exhaust System Topics
2
09-15-2007 03:03 PM
bobros
Softail Models
4
08-30-2006 09:13 AM



Quick Reply: Throttle stop screw rattles downward



All times are GMT -5. The time now is 09:51 AM.