Stihl 031 Chain sprocket switcharoo

[Kommandokenny]

Ok, so I got it, just now, in the mailbox .
I ordered/paid for it Feb 10 ,,,and they didn't bother mailing it till Feb 22!!! It's made in Canada, I'm in Canada,,, I ordered it from Amazon Canada,,,, and it came from UTAH, via burrow.

 

[scruffy808]

I got an older 031 given to me ,,3/8 pitch, big star cog on it.
It came with no bar .
I have a couple Stihl bars and chains kicking around, but they are .325 pitch.
My question is ,,,,can I just switch out the 3/8 star cog for a .325 star cog.
Can I go from #1113 640 2000 [ 3/8 ] to # 11136402005 [.325] with out buying a conversion kit, or any other parts and utilize one of the .325 bars I have .
The Spur Sprocket part 1113 640 2005 .325 is 30 bucks.... a new 3/8 p Stihl bar and chain is over a hun$.
I know I'm not missing anything by not running the 3/8 chain, as I have that setup on my Stihl 038 .
Any input upside -/ downside is appreciated.
The 3/8 cog has some hack marks in it also ...see pic
Thanks


View attachment 963041

HI from Australia, my 031 runs the 3/8 inch pitch 7 rim sprockets think they are on an Oregon clutch drum far better - and cheaper-to replace the rim sprocket than the whole star clutch drum. Hope that helps guess you got it sorted from back in 2018!!

 

[Kommandokenny]

Hi Oz .
I have the 3/8 Oregon rim sprocket mod. I also have the 3/8th and .325 star cog clutch drum affair . So I can run different setups.
Right now I'm using the .325 star cog, as I had extra bars and chain for that config.

Cheers