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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: foliver on March 11, 2022, 09:05:43 PM

Title: if i press the starter button whe the bike is idling......
Post by: foliver on March 11, 2022, 09:05:43 PM
Hi. BMW K75C 1986
if i press the starter button whe the bike is idling, it lower the revs, until the engine stals.

It's supose to rev up, or if it's consuming more fuel, stays at the same revs...i'm right?
What can happens?

Title: Re: if i press the starter button whe the bike is idling......
Post by: Laitch on March 11, 2022, 10:10:26 PM
Have you done a tuneup on this thing yet? If you haven't you're on the wrong page.  :laughing4-giggles:
Title: Re: if i press the starter button whe the bike is idling......
Post by: frankenduck on March 11, 2022, 11:24:03 PM
The start button enriches the mixture.  By pressing and holding it at idle you're probably flooding the engine. (On a bike that runs rich at idle in the first place.)

Solution: Don't press and hold the start button at idle.
Title: Re: if i press the starter button whe the bike is idling......
Post by: foliver on March 12, 2022, 04:13:44 AM
Have you done a tuneup on this thing yet? If you haven't you're on the wrong page.  :laughing4-giggles:

Hi Laitch, i've done valve clearences, ignition ultrasonic cleaning, cables, sparks, pump ( and other things not related to that).
I don't have touched the throttle bodies.
The bike was running rich before i started the resurrection....

From were can i start, bodies sync?
Title: Re: if i press the starter button whe the bike is idling......
Post by: foliver on March 12, 2022, 04:16:28 AM
The start button enriches the mixture.  By pressing and holding it at idle you're probably flooding the engine. (On a bike that runs rich at idle in the first place.)

Solution: Don't press and hold the start button at idle.

jajaja, you seems right, cause the bike runned rich from the first time i got it some years ago.

In the previous answer i've described what has been done, were do you think i can attack to achieve a good balance? ( not a rich one).
The bike was not eficient on gas ( 12km/liter in highway) , now i'm post consumption in some days..
Title: Re: if i press the starter button whe the bike is idling......
Post by: Laitch on March 12, 2022, 12:38:28 PM
I don't have touched the throttle bodies.
The bike was running rich before i started the resurrection....From were can i start, bodies sync?
You should synchronize the throttle bodies. The Mighty Gryphon will show you how to make an effective manometer out of bottles, tubing and scrap wood.
Title: Re: if i press the starter button whe the bike is idling......
Post by: Laitch on March 12, 2022, 12:43:27 PM
Click on this link (http://www.motobrick.com/index.php?PHPSESSID=9fd84dbf799ddbef4506da708accdb5f&topic=7262.msg50254#msg50254) for instruction and explanation.
Title: Re: if i press the starter button whe the bike is idling......
Post by: foliver on March 12, 2022, 04:38:01 PM
Click on this link (http://www.motobrick.com/index.php?PHPSESSID=9fd84dbf799ddbef4506da708accdb5f&topic=7262.msg50254#msg50254) for instruction and explanation.

This is a good gift.
Thanks!!