Shift Drum Positioning Bolt

indr · 01-04-2013, 07:36 AM

What exactly does this do? The first four things in the pic from the top that make it up (bolt, washer, spring, tube thing).

Mike Ryder · 01-04-2013, 07:56 AM

First, it's not the drain plug. As it's name indicates it locates the shift drum in each gear. the spring loaded plunger seats in the cutouts of part #13145 which is pined or otherwise locked to the shift drum. Without it the bike would shift around at will.
Have I been trolled?

kioti · 01-04-2013, 08:00 AM

Spring loaded plunger rides on the 13145 detent plate and is what locates and keeps the shift drum/shift forks in position for the gear selected.

indr · 01-04-2013, 08:25 AM

Not a troll. Just not knowledgable.

Mike Ryder · 01-04-2013, 08:55 AM

This sort of looks like an cb175 honda. My first twin cylinder in the 70s.
Do i win?

indr · 01-04-2013, 08:58 AM

250 ninja.

Mike Ryder · 01-04-2013, 09:05 AM

ah. what's wrong with it?

indr · 01-04-2013, 09:10 AM

Sort of a rebuild. First time with an engine opened up. Don't know what does what.

rufus · 01-06-2013, 11:36 AM

Quote:

Originally Posted by indr

Sort of a rebuild. First time with an engine opened up. Don't know what does what.

It holds the shift drum in position.

I had a 1980 Maico 440 that had a weak spring there. Occasionally while landing from jumps the weight of the shift lever pulling down would down shift another gear. I would pull the spring out and stretch it to put more tension on the spring. The auto downshifts would stop.

01-04-2013, 07:56 AM	#2
Mike Ryder Kriegerkuh Joined: Oct 2003 Location: Peachland B.C. Canada Oddometer: 687	First, it's not the drain plug. As it's name indicates it locates the shift drum in each gear. the spring loaded plunger seats in the cutouts of part #13145 which is pined or otherwise locked to the shift drum. Without it the bike would shift around at will. Have I been trolled? __________________ Yes I am quite serious.

01-04-2013, 08:55 AM	#5
Mike Ryder Kriegerkuh Joined: Oct 2003 Location: Peachland B.C. Canada Oddometer: 687	This sort of looks like an cb175 honda. My first twin cylinder in the 70s. Do i win? __________________ Yes I am quite serious.

01-04-2013, 09:05 AM	#7
Mike Ryder Kriegerkuh Joined: Oct 2003 Location: Peachland B.C. Canada Oddometer: 687	ah. what's wrong with it? __________________ Yes I am quite serious.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: .
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

01-04-2013, 07:36 AM	#1
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	Shift Drum Positioning Bolt What exactly does this do? The first four things in the pic from the top that make it up (bolt, washer, spring, tube thing).

01-04-2013, 08:00 AM	#3
kioti Cruzinonline Joined: Mar 2011 Location: East end of the yellow brick road Oddometer: 205	Spring loaded plunger rides on the 13145 detent plate and is what locates and keeps the shift drum/shift forks in position for the gear selected.

01-04-2013, 08:25 AM	#4
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	Not a troll. Just not knowledgable.

01-04-2013, 08:58 AM	#6
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	250 ninja.

01-04-2013, 09:10 AM	#8
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	Sort of a rebuild. First time with an engine opened up. Don't know what does what.