How do I tighten front Sprocket once Chain is off ?

[GRV]

I am in the process of changing my front sprocket. I followed the procedure , while the chain was still on, of using a piece of wood in between the wheel and rear swing arm to stop the spindle from turning (had it in neutral as suggested) . So I was able to remove the sprocket nut. But now that I have the new sprocket on how do I tighten it since the chain is off and I cannot use it stop the spindle from moving while the engine is in neutral? What is the proper procedure ?

 

[Hayabusa Wannabe]

Welcome to the forum @GRV.

 

[BlueBacon]

Why not put the new chain together and do the same thing you did to take it off...?

 

[jellyrug]

There are sprocket holding tools, but if you don't have one just wrap a piece of your chain around it and stick a screw driver in between the chain bushings.

 

[sixpack577]

Why not put the new chain together and do the same thing you did to take it off...?

This^
and if you cannot do that now for whatever reason...eventually you'll have to put the chain back on...and you can tighten the sprocket nut then...

 

[jdamato]

Pop it in gear, 2 seconds with the impact gun, done.

 

[LC4CARL]

Is that one "Rat a tat" or two..?

 

[sixpack577]

Pop it in gear, 2 seconds with the impact gun, done.

That is big gamble.
As that is an easy way to bend a shift fork.

 

[LC4CARL]

Interesting. Applying torque in the "tighten the bolt direction" vs the "engine braking in the opposite direction," side-loads the fork?

 

[LC4CARL]

Maybe something like this?

https://www.grainger.com/product/4C...V39HCBB3oBgqsEAQYASABEgLL_PD_BwE&gclsrc=aw.ds

 

[jellyrug]

Pop it in gear, 2 seconds with the impact gun, done.

Ugh, I'm not sure I want to do that.

 

[sixpack577]

Interesting. Applying torque in the "tighten the bolt direction" vs the "engine braking in the opposite direction," side-loads the fork?

Turning the sprocket nut and shaft either direction by impact, with the transmission in gear is stressing the shift fork(s).
You can bend a fork with a breaker-bar too, so the transmission should always be in neutral.

 

[pashnit]

I got creative.

 

[GRV]

Thanks all I saw a video referencing popping the rear shaft in and wrapping the chain around it with the screwdriver going through it. Seems like the way to go since the tire is off anyway. Thank you to all of you for your replies. Much appreciated.

 

[202mphbusa]

That is big gamble.
As that is an easy way to bend a shift fork.

Huh. If the impact gun would do that. ? Shift forks are barely under load after a shift unless holding lever or gears are tapered/slipping worn. No?

 

[sixpack577]

Huh. If the impact gun would do that. ? Shift forks are barely under load after a shift unless holding lever or gears are tapered/slipping worn. No?

No
When you put torque on the output shaft, in either direction, with the transmission in gear, the quick twist of the countershaft can bend the forks, as they are currently engaging gears and their pins can be damaged in the drum track.

 

[GMbusa]

Why not tighten it after you reinstall the chain? Why are you making this harder than it needs to be?