BMW K bikes (Bricks)

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1Back to top Go down   Swapping Complete engine & Gearbox Empty Swapping Complete engine & Gearbox on Mon May 27, 2019 10:37 am

mike d

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Hi all,

There is a BMW club member in the UK (Scotland) who want's to change the engine & gearbox that is in his 1998 K100RS (2 valve). The donor bike is also a 1998 K100RS (2 valve).

Is there anyone out there who has done this and can pass on any hints and tips to do the job. I will be sending him both a BWM workshop manual and a Clymer manual.

I have some gearbox guide pins for him, and if needed BMW tool 26 1 660 for swing arm fixed bearing.

He is planning to take the opportunity to lube the clutch and rear drive splines.


I know the manuals will be detailed, however it's always better to hear from those who have had the practical experience, and may have shortcuts.

The reason for the change: The original engine has covered 170,000 miles and has just made some nasty noises (from his description it sounds like clutch/input shaft splines).

Thanks in advance for your help.

Mike

    

2Back to top Go down   Swapping Complete engine & Gearbox Empty Re: Swapping Complete engine & Gearbox on Mon May 27, 2019 4:03 pm

chris846

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Tip No.1
Tell him to join the forum and post some pics!

The rest is easy  Smile

Actually, my tip for starters is/are A: support the swingarm when the shock is removed - or you risk trapping and damaging the front bellows between swingarm and gearbox. B: Cable tie the clutch release arm to the gearbox when you remove the clutch cable - otherwise the spring inside the clutch release bellows will overextend and probably tear the bellows.


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Sometimes I'm not really Suzi Quatro.
    

3Back to top Go down   Swapping Complete engine & Gearbox Empty Re: Swapping Complete engine & Gearbox on Mon May 27, 2019 4:38 pm

duck

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A: It won't damage the boot at the front of the swing arm but the boot may slip off of the transmission.

When I built my K75 Frankenbrick I started with the motor sitting on blocks of wood. I put some additional support under the valve cover as the engines are a bit lopsided when sitting on the oil sump and like to tip over. I laid the wiring harness and relay box on the top of the motor before installing the frame.

Swapping Complete engine & Gearbox LRsBiWU


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

4Back to top Go down   Swapping Complete engine & Gearbox Empty Re: Swapping Complete engine & Gearbox on Mon May 27, 2019 7:49 pm

mike d

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That's a good start chaps, thanks.

I will encourage him to join the forum, as I said I would be asking on here for opinions.

O.K. soh wat about the initial strip down - pitfalls and all.

Thanks 

Mike

    

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