Mikuni HSR 42/45/48 Pull Choke Knob Assembly

Additional Information

Fitment Information

• does this choke need a bracket to mount to the carb

  Yes. This assembly threads directly into the body of the HSR series carburetors.

  Answer by: Web Support (Admin) on Feb 9, 2016 10:12:00 AM

• Looking for the threaded plug only. Is that a optional part to buy? Or do i have to order complete assembly?

  The choke nut is available on its own if you are running a cable operated choke: http://www.nichecycle.com/ncs/categories/carburetor/replacement-parts/640-12001-holder-by-mikuni.html

  Answer by: Web Support (Admin) on Aug 27, 2018 1:44:00 PM

• What are the dimensions and thread sizes of tm40/07 and tm29/31 choke pumper assemblies?

  The TM39/31 is used with the HSR 42, 45 and 48 carbs. It is much longer than the TM40/07. The dimensions of the TM39/31 is as follows:
  Overall length: 85.57 mm (from top of cap to base of spindle); Outside of screw threads, 11.5mm; Base of thread area to end of spindle (choke fully in): 48.43mm. OD of plunger 7.97mm; Length of plunger: 14.81 (without tip); spindle tip (below plunger) 7.34mm
  The TM40/07 choke assembly is used with the TM36, TM40 and HS40 carbs.The dimensions are as follows:
  Overall length: 59.25 mm (from top of cap to base of spindle); Outside of screw threads, 11.90mm; Base of thread area to end of spindle (choke fully in): 30.41mm. OD of plunger 7.97mm; Length of plunger: 9.73 (without tip); spindle tip (below plunger) 7.1mm
  

  Answer by: rick c (Admin) on Mar 3, 2020 9:29:00 AM

• Does this choke stay open by itself? I'm replacing one that does and just want to confirm.

  Yes, the choke remains on/up, until it is manually closed.

  Answer by: Web Support (Admin) on Jul 15, 2020 11:42:00 AM