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Workshop => Engine and Bottom End => Topic started by: Bharris on July 25, 2016, 11:35:33 AM

Title: Transmission Problem
Post by: Bharris on July 25, 2016, 11:35:33 AM

How much backlash should there be between gears?

I have my engine on my bench, inspecting the bottom while the top is away to be ported.  Seems that I have too much backlash between the gears.  I noticed that the shifter became very hard to snap into gear just before removing the engine.  I haven't split the cases yet to check out what's going on in the shifting mechanism, but in the meantime I have realized that have about 1/8 rotation of backlash at the Counter Shaft (or where the small sprocket was).

Thanks in advance for your help.

Title: Transmission Problem
Post by: huntertools on July 25, 2016, 08:57:17 PM

Just checked two motors and they had about 3/4 to 1 inch of play in the transmission. Seemed normal to me. Hope this helps.
Allen

Title: Transmission Problem
Post by: Tbone07 on July 26, 2016, 09:54:00 AM

I just assembled my bottom-end. Will check this when I get home from work tonight

Title: Transmission Problem
Post by: Bharris on July 26, 2016, 11:20:52 AM

Thanks Tbone.  I had another buddy check last night and he has this amount of free movement on the Counter Shaft as well.  

I have questions about the transmission too (this is my first time opening the case).  If you have some advice for me regarding the tranny then I sure would appreciate it.  I have the case split now, but I haven't pulled any gears out because I don't know what to look for.  While riding, my shifter was getting stuck just before engaging the next gear.  It would go into gear, but I had to put way too much upward force to do it.  Same with all of the other gears, but it seemed to get a bit easier with each gear progression.