CRF150 Fork Oil Seal Replacement

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Aikoyama’s CRF150. The fork oil was leaking, so he wanted it done urgently. The parts arrived, so let’s get started right away.
Vertical scratches on the inner tube are usually caused by debris getting caught, which often means poor lubrication.
A little cleaning and lubrication can really extend the life of the fork.

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He wanted to add preload, so I made a spacer, but…
I realized later that the plastic collar that regulates stroke won’t fit through the center.

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Drilling through the center was a pain, so I just went for it with a 19mm drill bit. Oops… still doesn’t fit. I didn’t check carefully enough and turned it into scrap.

 

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Once I put in the preload collar, I realized I can’t install it alone without special tools.
Should I call him in? What should I do?

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Since it’s an off-road bike, the free length is too long and our inverted compressor couldn’t reach it.
I had no choice but to make an extension to get it compressed.
Slide metal work goes pretty deep—if you haven’t done it on a particular bike before, it’s worth reconsidering. After he came to pick it up, we ended up chatting and that’s all we got done today.

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