clutch on jackshaft

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silverbear

The Boy Who Never Grew Up
Jul 9, 2009
8,325
670
113
northeastern Minnesota
Sure it's possible to have the clutch on the jack shaft.That's how the EZM transmission is set up. It is all in one transmission, but the principle is the same so the jack shaft could be mounted to the rear of the seat post as a separate unit. What bike and engine do you have in mind?
SB
 

cannonball2

Well-Known Member
Oct 28, 2010
3,682
221
63
Colonial Coast USA.
Clutch on the jackshaft is an excellent idea. You just have to choose the primary ratios carefully to insure the clutch operates in its designed range. Also a tunable clutch would be the way to go. Maxtorque makes a reasonably inexpensive tunable(or did the last time I bought a cent clutch) called the TT. Like SB says the jackshaft usually can be easily mounted to the seat post.
 

Davezilla

New Member
Mar 15, 2014
2,705
10
0
San Antonio Texas
It'll work as long as you set up the primary ratio so the jackshaft rpm will operate the clutch at the proper ratio.... what type of clutch are you planning on using?
 
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Davezilla

New Member
Mar 15, 2014
2,705
10
0
San Antonio Texas
As long as you can set the ratio where the clutch can operate I don't see any problems.. are you planning to run the primary at a 1:1 ratio or are you planning to over or underdrive the clutch to change the engagement rpm?
 

FFV8

New Member
Oct 29, 2013
551
16
0
Spring Valley NV
Easy as pie.

Run a Hilliard ED clutch, and use the 1200 rpm (red) springs. That means the clutch hits @ 2400 engine rpm with a 2;1 under drive.

They make springs from 830 rpm to 3000 rpm - tuning is easy.

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