Problem

[Rabbitist]

im a machinist by trade so guna take the crank to work and have a go.. should i replace the crank pin? what material are crank pins made from? might whip a new one up

[Rabbitist]

scrap making a new pin ive just read they are chrome plated.. unless nimonic would do? anyone know were the cheapest place is for rod kits??? or could i re use the pin and just swap out the bearing and rod?

[Rabbitist]

sorry to keep posting.. are the cr 250 con rod kits the same then? if so what years?

[pscook]

Rod kits include the pin and big end bearing. Some kits come with small end bearing, you need to confirm. I think that all CR250 rods fit starting after 1990, or something like that. I made sure that my rod was from the late 1990's/early 2000's to ensure compatibility.

[Rabbitist]

Does that mean that the cr250 kit will fit? Sorry if im being dumb lol

[pscook]

Originally Posted by Rabbitist

Does that mean that the cr250 kit will fit? Sorry if im being dumb lol

Yes the kit should fit, just not the piston.

[noobi]

I believe its this rod http://catalog.vesrah.co.jp/catalog/shape/VA-5001.html
Which is 81-01 CR250, which would make sense and that would be the rod that gasgas borrowed when making their engine.
If you're confident to press the crank and tru it up then go for it and save yourself some coin.

The versah p/n may even be on the old rod, it was on my 125.

[Rabbitist]

thanks guys all this info is very much appreciated! am i right in thinking that if i press the pin on the crank somewhere near i can then bore out and hold it in soft jaws in a lathe and tap it true with a dti on the bearing journal and a hyde mallet?

[Rabbitist]

or is it better done in vees?

[HenrikSchmidt]

I would do it in vees, and check it after reassembly with a test indicator on a balancingstand.