R long rod with spacer plate: What base stud d I need?!

[250r'en +TCB]

Hey guys,

Running into a little trouble here. I was rebuilding the engine and upon taking it apart I noticed the main bearings had a little play on the crank so I decided I mine as well update to the long rod if I have to buy a new crank anyway. I have an OEM cylinder with an LA sleeve and the spacer plate from them as well.

On the 85-86 ATC250R parts fiche it lists both 10x70mm AND 10x45mm. Upon pulling mine out I measured and they are a 10x70, all four. So I am thinking I need a 10x80mm at least?

Also, what did you use for a dowel that goes between the case, spacer and cylinder?

Thanks in advance guys!

[The_Steve_Man]

Eddie Sanders Racing has what you need.
http://www.eddie-sanders-racing.com/category_s/133.htm

[250r'en +TCB]

Eddie Sanders Racing has what you need.
http://www.eddie-sanders-racing.com/category_s/133.htm

I went to them as one of my first options, but what worries me is that they do not say the length of the Cylinder Long Stud. I don't know how ESR cylinders compare to stock? Maybe they have a taller stud channel on their jugs than OEM, in which case there wouldn't be enough thread on the stud. I'm just thinking out loud, but have you purchased these before?

[The_Steve_Man]

I have not. I don't know what length they are. You could use threaded rod or bolts. The dowels will line the cylinder up.

[deathman53]

you need the longer dowel to line the cylinder up correctly. Just buy the esr kit, I use that for my lrd/led pro-x cylinders and stock ones in the past.