K11 Owners Group

ryancoke · Joined: 09 Mar 2016 Posts: 7

. This is my first horizontal engine. I have five motorcycles but they're all in line or V. I am trying to do a leak check on the cylinders. Can someone describe to me how to rotate the crankshaft find top dead center and where to access the crankshaft to rotate the engine . I can't seem to find the manual thank you very much take care

ryancoke · Joined: 09 Mar 2016 Posts: 7

Nobody knows?

Flying Duck · Posted: Wed Mar 09, 2016 8:43 pm Post subject:

On a K bike it's actually left dead center. (That's a joke.)

Easiest way to turn the engine is to put it on the center stand, put in in fifth and rock the back wheel.

Here's a link with the BMW shop manuals that will probably help you find TDC.

http://www.kbikeparts.com/classickbikes.com/ckb.tech/ckb.tech.toc.htm
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

ryancoke · Joined: 09 Mar 2016 Posts: 7

Lol duck. But the problem is I have the centre stand right off the bike. I suppose I could put some scissor jacks below it. Thx

Flying Duck · Posted: Thu Mar 10, 2016 12:11 am Post subject:

The other option is to pull the stuff/battery under the rider and run a sawhorse through the frame to support it. Much more stable than jacking.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

Grunter · Posted: Thu Mar 10, 2016 6:00 pm Post subject: Top Dead centre.

I have an old spark plug which has the centre removed and then opened out to take a 5mm wide rod. If you have something similar, Insert the spark plug into No 1 cylinder there is no need to have it more than finger tight. If you don't, a slightly thicker rod or even a wooden dowel hand held, will do the same job

Then if you remove the valve cover you will find the camshaft has hexagonal castings on the area between the cam lobes. with the gearbox in in neutral, fit a 19mm open ended spanner on the hexagon and turn the engine anti-clockwise to rotate the crankshaft. (This is the way the motor runs)

Insert the 5mm rod into the converted spark plug until it touches the piston and as the engine brings the piston up to TDC, the rod will move out until it reaches the TDC point and then using finger pressure on the rod, it will follow the piston down. It may take a bit of trial and error to get exact TDC.

Make note that when you have reached what you judge to be TDC make sure both inlet and exhaust valves are closed, if they are not, rotate the crank one full revolution which then bring it to the correct TDC.
_________________
1997 K1100LT
1994 R1100RS

ryancoke · Joined: 09 Mar 2016 Posts: 7

OK guys, I raised the back and put it in high gear and there is no way I can spin the tire. What ahappened to the old way like on my Suzuki of hooking a socket up to the flywheel and turning the crank shaft that way. Does BMW not do the same?

Mike d · Posted: Fri Mar 11, 2016 8:26 pm Post subject:

Flying Duck · Posted: Fri Mar 11, 2016 10:51 pm Post subject:

SugarHillCTD · Posted: Sat Mar 12, 2016 7:40 am Post subject:

ryancoke · Joined: 09 Mar 2016 Posts: 7

Ok I tried the rear wheel method, yes spark plugs are out (would be pretty tough with them in!), and still find this a pain in the butt and not very accurate. Are these really the only ways of getting TDC on this bike? I could have done all 5 of my other bikes by now! Lol
Using a breaker bar and socket on the wheel hub would require spinning the engine backwards. If you spin the engine forward it would just loosen the wheel nut. Not a fan of spinning engines backwards.

Grunter · Posted: Tue Mar 15, 2016 3:13 pm Post subject: TDC

I don't mean to upset anyone but possibly the only easy way to get TDC on a 'K' is the way I have described in my previous post. It works every time and will get VERY accurqte results. I have been doing this way since 1988!

Turning the rear wheel is a very crude way to do it and will only gt less than average accuracy, however many times you try. The hexagons cast on the camshaft are there for that specific purpose.
_________________
1997 K1100LT
1994 R1100RS

Flying Duck · Posted: Wed Mar 16, 2016 1:00 am Post subject: Re: TDC

Jnclem · Posted: Wed Mar 23, 2016 5:51 pm Post subject:

I needed to find TDC to check my valves. I've always used the rear wheel method on all my BMWs, but next time I check them on the K, I'll use the cam shaft. Sounds good. I just never looked for another way to do it besides turning the rear wheel.
_________________
'93 K1100LT, '89 R100GS

Flying Duck · Posted: Wed Mar 23, 2016 8:37 pm Post subject:

You really don't need to find exact TDC to do valves. Just get the cam lobe pointing more or less straight out from the direction of valve travel as the rest of the cam lobe profile is circular.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE