OzVMX Forum

Clubroom => Tech Talk => Topic started by: Big Scotty on January 17, 2013, 04:44:14 pm

Title: Splitting late model yz250 crankcase
Post by: Big Scotty on January 17, 2013, 04:44:14 pm

Has anybody rebuilt a late model 2011 yz 250 2 stroke bottom end? Do you need a puller to separate the cases or are they like my 77 model and come apart easy. Any help appreciated
Thanks Scott

Title: Re: Splitting late model yz250 crankcase
Post by: SUZUKI311 on January 18, 2013, 06:17:37 pm

THey will come apart relatively easily. i always use a crankcase separating tool, obtainable from any decent bike shop (who can get them from MCS, amongst others) and come with a variety of attachments to suit many different bikes. i have seen many a crank damaged by using the old copper hammer trick, it just is not the correct way to do it, even though in a pinch if you are VERY CAREFUL you can do it this way.

Title: Re: Splitting late model yz250 crankcase
Post by: Big Scotty on January 18, 2013, 06:51:06 pm

Thanks for that reply,I rebuilt a kx250 18months ago an had heaps of trouble,I think ill invest in a puller, it sounds like a great investment.

Title: Re: Splitting late model yz250 crankcase
Post by: Tim754 on January 18, 2013, 07:40:40 pm

It is! invest and be happy!

Title: Re: Splitting late model yz250 crankcase
Post by: Hardo on January 18, 2013, 09:17:59 pm

Quote from: Tim754 on January 18, 2013, 07:40:40 pm

It is! invest and be happy!

100% agreed. I used to do the caveman method (as many have before me on lots of bikes I have worked on   :-\ ) until I bought a case splitter and Crank puller from Tusk.
Do a search for Tusk Crank puller and case splitter on ebay. Spend the dollars now and never look back.  :)

Title: Re: Splitting late model yz250 crankcase
Post by: crs-and-rms on January 19, 2013, 01:01:13 pm

i use a crank case puller to the only way to ,go saves damaging the crank and the cases i also use crankshaft installer on two strokes you should never hit crankshafts