125 2stroke engine case

So i finally got hands on a 125 side casing but noticed something odd about the gearbox,been told ive got the sr125 case what gearing could i use apart from the sr 125 gearing as in on a budget , ive noticed it don't have a needle bearing in the gearbox like a runner 125engine and don't want to buy twice

 

Probably a early non rolling nut engine? Need to see photos of it. Use a Malossi secondary gear kit or a early 180 runner gear set!

 

I haven't got access to a computer but as soon as i do ill send you the picture for you to verify it

 

Uploaded a picture of it

 

It's a rolling nut engine, it should have brake caliper lugs !