BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   New from Denver CO Empty New from Denver CO on Wed Oct 23, 2019 5:15 am

winmag4582001

winmag4582001
New member
New member
Hello all,
My 17yr old son just picked up a 89 K100rs that he’s going to strip and build to match his 87 535is.
We’ll probably be asking some questions on here(we’ll try the search function first). For starters it’s a clean bike with non functioning ABS that we’re going to eliminate. Only real issue with the bike is it won’t start when cold unless you fog her throat with a little eather. Then it fires up and purrs like a kitten and runs hard, we’re assuming it’s a failing fuel pump or blocked FF.
We’re looking forward to the project!

    

2Back to top Go down   New from Denver CO Empty Re: New from Denver CO on Wed Oct 23, 2019 5:35 am

Arlina

Arlina
Life time member
Life time member
Welcome Winmag Smile


__________________________________________________
New from Denver CO Eu-log10  K1100RS/LT - R1200RT - R1100RS (RIP) - Cagiva SST 350 Ala Verde
    

3Back to top Go down   New from Denver CO Empty Re: New from Denver CO on Wed Oct 23, 2019 6:37 am

moriarti

moriarti
Silver member
Silver member
Hi i take it the bike starts ok when warm,with the Ks if we presume to assume shit happens
Easy start products are not recommended,if the engine spins at a good speed,on starter do compression test and start from there,good luck with the project. New from Denver CO 177912


__________________________________________________
1984 k100 rs red/black VIN  0004449
    

4Back to top Go down   New from Denver CO Empty Re: New from Denver CO on Wed Oct 23, 2019 7:58 am

MartinW

MartinW
Life time member
Life time member
After failure to start check the spark plugs. Are they wet or dry?
Regards Martin.


__________________________________________________
K75s Hybrid
    

5Back to top Go down   New from Denver CO Empty Re: New from Denver CO on Tue Oct 29, 2019 9:11 pm

winmag4582001

winmag4582001
New member
New member
OK, so we are pulling it all down. Since it's snowing it gives time.
We'll check valve clearance and do all the typical stuff.
Searching the forums I think we may go with K75 pistons and hone then re ring it.
My son has a 82 320i, 84 533i, 85 535i and a 87 535is. The motorcycle looks to be typical 80's BMW technology.  Very Happy

As far as the no start when cold, we cranked on it for 5 minutes and got no heavy fuel smell out of the exhaust.  There's no excessive fuel smell in the oil either. Had the same issue on the 85 535i and we installed a 255lph in tank pump and bypassed the external fuel pump and it literally starts with a tap of the key, and it has 244k miles on it. Since then we've converted all the cars to a in tank only pump. Not really concerned since we're going through it. We'll post pics as we progress.

    

6Back to top Go down   New from Denver CO Empty Re: New from Denver CO on Tue Oct 29, 2019 9:34 pm

Laitch

Laitch
Life time member
Life time member
@winmag4582001 wrote:Only real issue with the bike is it won’t start when cold unless you fog her throat with a little eather. Then it fires up and purrs like a kitten and runs hard
Welcome. If it purrs and runs well, why would you consider changing the pistons and re-ringing it?


__________________________________________________
1995 K75 73,000 miles
New from Denver CO Usa-lo10
    

7Back to top Go down   New from Denver CO Empty Re: New from Denver CO on Wed Oct 30, 2019 2:26 am

charlie99

charlie99
VIP
VIP
@winmag4582001 wrote:OK, so we are pulling it all down. Since it's snowing it gives time.
We'll check valve clearance and do all the typical stuff.
Searching the forums I think we may go with K75 pistons and hone then re ring it.
My son has a 82 320i, 84 533i, 85 535i and a 87 535is. The motorcycle looks to be typical 80's BMW technology.  Very Happy

As far as the no start when cold, we cranked on it for 5 minutes and got no heavy fuel smell out of the exhaust.  There's no excessive fuel smell in the oil either. Had the same issue on the 85 535i and we installed a 255lph in tank pump and bypassed the external fuel pump and it literally starts with a tap of the key, and it has 244k miles on it. Since then we've converted all the cars to a in tank only pump. Not really concerned since we're going through it. We'll post pics as we progress.

you wouldn't hone it at all
the cylinders are lined nickasil , and there is virtually no wear to talk about , k75 pistons fit straight in , same bore and stroke

starting issue , more likely a fuel pressure regulator - injector clean issue , the correct bmw pump has a backflow valve which maintains pressure for a good while along the pressure rail , if the pressure regulator weeps internally a bit, as they can do , could take some time to get fuel to pressure along the fuel rail for the injectors .

just do the irregular maintenance required for any neglected engine and im sure you will be surprised

welcome aboard


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%ONew from Denver CO Au-log10

"redframe" rs "bitsa"  with many contributions from the k100 community ,,with many thanks
    

8Back to top Go down   New from Denver CO Empty Re: New from Denver CO on Sat Nov 02, 2019 4:39 am

winmag4582001

winmag4582001
New member
New member
Charlie99 Thanks for letting me know about the cylinder lining. My son and I are new to street bikes. Been into cars forever. We’re eager to open it up and play. He read somewhere that the K75 pistons were higher compression, that’s the reason behind finding a set for it. The boy has a lot of energy and I have to give him credit, he’s a better mechanic and electrician than most adults I know. LOL Thanks for the replies!

    

9Back to top Go down   New from Denver CO Empty Re: New from Denver CO Today at 7:16 am

88

88
Life time member
Life time member
Nice project. Good luck with it.


__________________________________________________
New from Denver CO Ir-log11 88....May contain nuts!New from Denver CO Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

10Back to top Go down   New from Denver CO Empty Re: New from Denver CO Today at 9:59 am

duck

duck
Life time member
Life time member
Fuel filter - NAPA 3032


__________________________________________________
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
http://www.ClassicKBikes.com
    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum