Alsport RTS Jackshaft chain tensioner

#1
I noticed in another persons Alsport that there was an extra sprocket that seemed to act as a chain tensioner. Mine has a bracket in that location but no extra sprocket in that location. Now, on my jackshaft itself, there is an extra sprocket that I can't figure out what it's purpose would be. Thanks for the help.





 
#4
Your "extra" sprocket looks like it has worn teeth and was probably just moved over instead of being removed. Is it worn or just a different tooth count? ... Spare part. Its out of the way. Doesnt look like it was set up for dual chains or anything so I wouldn't worry about it. Or it was used in place of a collar.
 
#5
Idler sprocket, yes that's what I'm missing. I believe your correct and someone just slid it over instead of removing it. Teeth are pretty bad on it. Thanks for your help.
 
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