To fix it properly you need to strip the engine You can just weld it on but cool with water as the seal will melt It isn't good welding it on as they do tend to snap the weld sooner or later. But nothing to loose if it keeps breaking you just replace the worn shaft anyway
SOURCE: crf 70 want go into any gear
Sounds like a shift fork is bent. This is a classic symptom. It is best to let the shop do the repair.
SOURCE: Unable to shift second gear and up on a CRF 250 X 2008
You have a bent shift fork. The repair means taking the engine out of the frame then removing the top end, removing the flywheel and electrics, removing the clutch , shift mechanism and kick starter and a few other parts. THEN you are ready to split the gearbox to remove the gears and then the bent shift fork. Next you get to put it all back together. This is a pretty big job for the home mechanic.
You will need an impact driver, flywheel puller, case splitter and torque wrench plus the normal screwdriver, pliers, etc.. Alternate to the special tools is taking it to the dealer and say "Fix it".
I normally tell people to take it to the shop just so they don't get into such an involved project.
Please rate this answer, (even though it's not what you wanted to hear). :-)
SOURCE: 2004 CRF 100 shift lever seal leak
Yes. Once you remove the engine cover and expose the shaft and seal, carefully pry the old seal out with a small flat blade screwdriver. Apply some grease to the inside diameter of the new seal, slide it over the shift shaft (clean it first) - and press it in place.
SOURCE: my 2005 crf 70 slams
First be sure there is adequate oil in the gearbox. Hard shifting is indicative of a bent shift fork or two. The engine will
need to come out of the bike. Remove the top end, the flywheel and electrics,
the clutch, shift shaft and kick starter and a few other parts. THEN you
are ready to split the gearbox to get to the crankshaft,
gears and shift forks. You will
need an impact driver, flywheel puller, case splitter, torque wrench and factory
service manual, plus the normal screwdriver, pliers, etc.. Alternate to
the special tools is taking it to the dealer and say "Fix it". I
normally tell people to take it to the shop just so they don't get into
such an involved project and they have a knowing eye working on the engine. Below is a diagram showing how the shift drum moves the shift forks left & right to change gears. Please
rate this answer. Thanks.
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