MOTOBRICK.COM
TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: NZGlyn on May 07, 2024, 06:00:51 AM
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Hi, quite new to the site and I wonder if there are any logical steps stated anywhere for the gearbox grub screw repair. My bike is showing the classic floppy gearchange symptoms. At this stage I'm not sure how to get into that gear box or what special tools may be needed. Also, what other jobs should I really do when I am there? The bike is a 1991, K75 RT has done around 46,000 miles. Cheers.
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The grub screw was the first job I ever did on a Brick. Took about 8 hours start to finish and didn't require any special tools. Just take your time.
The transmission splits fairly easily and is just a little fiddly to get the cases back together, but not real bad. As I recall, the worst part of the job was getting the grub screw back in after I cleaned it and applied blue Loctite to the threads. I dropped it into the transmission a couple times and had to fish it out.
While you are in there, it is a great time to lube the clutch splines and replace the clutch o-ring and maybe the rear engine main seal. Be very careful with the clutch boot or you will have to replace that too.$$$
Take your time and bag and label the stuff you pull off as you go. This will save a lot of time when you put it all back together. You will need a stack of blocks to put under the engine when you remove the transmission. As you reassemble, put a little anti-seize and and torque all the fasteners. Install new brake pads, lube the drive shaft and change the transmission and final drive fluids and the entire rear of the bike will be in top shape when you are done.
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Magic thank you for that great advice.
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One of these small motorcycle stands is kinda nice to have around for working on these bikes, and its compact so it stores easily, and its a bit easier to use than blocks. It will hold the bike up from the oil pan(remove any engine spoiler and be careful of your headers) no problem and its pretty stable like that. It's what i use when I cant use my center stand(like for gearbox work). You can usually pick them up for around $50(US) and they take up no space at all when not in use.