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I found a really nice crf70 on craigslist and the transmission is going out. Lots of new parts on it including cdi box, exhaust, footpegs, etc. Has a big bar kit. He wnts to trade for my running ttr90. The current crf has a lifan 125. If I get it I will put a pirhanna 140. Will it fit and is it worth it?Screenshot_20170831-093332.png

 

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I found a really nice crf70 on craigslist and the transmission is going out. Lots of new parts on it including cdi box, exhaust, footpegs, etc. Has a big bar kit. He wnts to trade for my running ttr90. The current crf has a lifan 125. If I get it I will put a pirhanna 140. Will it fit and is it worth it?Screenshot_20170831-093332.thumb.png.cfa93e241701aa9d4abd44997d699884.png
 
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Why do you say the transmission is going out?
Yes the 140 motor will fit. The issue is the rear exhaust mount won't line up anymore as the cylinder is longer.
You will also need to drill the rear rim and put a rim lock on.
I have a 140 with a high lift cam/ valve springs , high compression head and 24mm Mikuni carb. It's pretty damn powerful. Basically a 4 stroke version on a kx60

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