BMW K bikes (Bricks)

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1Back to top Go down   Hello from Lithuania Empty Hello from Lithuania Wed May 19, 2021 11:23 am

jetmotors

jetmotors
New member
New member
Just accepted an order from client to make a scrambler out of his 1990 BMW K100RS with 90k. Took a bike, checked a compression and found 110-110-120-115. Did a leak down test, it shows low leak, nothing is heard from exhaust or airbox, only from oil pan...starting to look for a guidance in your community:)

Greetings!

    

2Back to top Go down   Hello from Lithuania Empty Re: Hello from Lithuania Wed May 19, 2021 11:36 am

Arlina

Arlina
Moderator
Moderator
Welcome Jetmotors Smile


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Hello from Lithuania Eu-log10  K1100RS/LT - R1200RT - R1100RS (RIP) - Cagiva SST 350 Ala Verde - K75LT project - K75 Schurgers - K75S
    

3Back to top Go down   Hello from Lithuania Empty Re: Hello from Lithuania Sat May 22, 2021 4:56 am

crimona

crimona
active member
active member
Welcome!
Mine engine is having 12.5-13.2 bar in compression, cold, unstarted engine. 77k Km.
Hearing leaks from engine pan makes me think at used piston rings. Maybe it will still work but I don't know for sure and for how long.
However cafe will be used for short trips so only big issue for your client is that at some point engine will not be able to start. Prior of that it will not idle as supposed to. This is the moment when engine needs rebuild. Just make sure it checks more often oil level in order to not destroy crankshaft and oil pump.
Let us know how build works.

    

4Back to top Go down   Hello from Lithuania Empty Re: Hello from Lithuania Sat May 22, 2021 8:38 am

moriarti

moriarti
Life time member
Life time member
Hello from Lithuania 177912 FIRST job is to check Valve Clearance's, tight valves will give false compression readings. Good Luck


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1984 k100 rs red/black VIN  0004449
    

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