Gearing for a Yz 125

[Bkinz]

I was wondering what type and size of rear sprocket should I be running for my 125 in the woods? I only do woods riding, I don't want to sacrifice top end speed a lot. Although I do want to be able to lugg around. What would be the perfect middle.
Any advice is much appreciated.

 

[cubby]

Sounds like you want the best of both worlds which I think is going to be hard to get. First what tooth sprokets are you running now, front and rear? For woods riding I woundn't worry about the top end so much your not going to need it as much as the low end.

 

[Bkinz]

Ya, the front is a 14 and the rear is a 50. Ya, I would still like to be able to go atleast 55-60mph any ways.

 

[mxracer328]

i ran a 14 and 52 on my yz 125 when i raced in sand, lots of bottom,

and 14 and 50 on hard packed stuff.

 

[Bkinz]

So 2 teeth diff. is noticeable?

 

[mxracer328]

ya, especially if you get into some soft stuff, or alot of tight turns. if your gonna replace just the back, i also reccomend replace the front and chain too, if you dont it will wear out your sprockets and chain fast and end up having to replace it all anyways

 

[Bkinz]

So buy new chain and the 14t front sprocket? Along with the rear sprocket.

 

[Clarke673]

if i were you i would leave the rear sprocket alone, buy a 13 tooth drive sprocket and new chaine.

 

[Bkinz]

if i were you i would leave the rear sprocket alone, buy a 13 tooth drive sprocket and new chaine.

Well I'm needing to change the rear any ways though, its starting to get all wavey or whatever.

 

[JDKZRT]

I don't want to sacrifice top end speed a lot. Although I do want to be able to lugg around. What would be the perfect middle.

Sounds like the perfect middle would be a YZ250

 

[Bkinz]

Sounds like the perfect middle would be a YZ250

Lol ya i know, I would like to get a Yz250F. But not in my price range. lol

 

[xrated]

I was wondering what type and size of rear sprocket should I be running for my 125 in the woods? I only do woods riding, I don't want to sacrifice top end speed a lot. Although I do want to be able to lugg around. What would be the perfect middle.
Any advice is much appreciated.

FLy Wheel weight. That will let you lug a bit...at least you won't have to be so high in the Rs.

Huh myabe I should get one on my 1 2 and 5. As is I run stock sprockets on mine and run in the woods. Just gotta clutch more. Best thing I did for making mine woods friendly was to install a lowering link. No lie the best mod ever.

 

[xrated]

Sounds like the perfect middle would be a YZ250

naw the perfect middle that route would be orange and 144 or 200.

 

[Clarke673]

I just went orange and picked the biggest one i could find....

 

[mxracer328]

+1 on the flywheel weight, i forgot about that one.

 

[Bkinz]

Ok thanks guys for the help.
Brad

 

[jaysonfreerider]

So 2 teeth diff. is noticeable?

On my kx 250 i went from a 13, 52 to a 13, 51 and it made way more of a difference then i thought! I am going to put a 50 on the back some time!

 

[Bkinz]

Jayson doesn't it make it higher geared by putting a Smaller rear on? I'm going for the opposite effect. I think im just going to put a 13t on the front and call her good for now.