Question about 1975 BMW R 90 S

1 Answer

The bike starts great but doesn't hold an idle.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 301 Answers

Check the compression. Both cylinders should each be able to produce at least 140PSI of compression. If the compression is low, make sure the valve lash is set correctly. Insufficient valve tappet (valve lash) will cause valve leakage - and low compression. If the compression is good - then the carbs are likely clogged up. If the bike has been sitting for more than a few months, have them cleaned out.

Posted on Oct 01, 2010

Ad

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 8 Answers

SOURCE: idling the bike,wont hold an idle

It sounds as if you have dirt in your fuel line or some bad gas.
I would recommend draining your tank and cleaning it, then replace your fuel filter.

Posted on Dec 03, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Bike starts but idles rough, dies when its put in gear, the bike acts like it is not getting enough fuel, what could be the problem? also just changed fuel pump


you will have to find your idle mixture screw on the carburator and riching the mixture till the idles smooths out. Warm the motor up to operating temperature before adjusting.

Sep 07, 2013 | Great Plains Industries Gpi& Fuel Pump

1 Answer

2002 yamaha r1 it starts and runs great but idles at 3000 rpm when it gets warm


I have this problem on my 1998 r1 did you solve the problem?

Jan 10, 2012 | 2002 Yamaha YZF-R1

1 Answer

My Susiki dies sometimes when I make a stop or slow dow suddently. Whats the problem?


Hello
I would start with the easy less expensive stuff first.
Check/Replace your spark plugs. Carbon fouled, sooty plugs don't like to idle.
Clean/Change your airfilter. Dirty air filters choke the motor. choked motors either stall or rev high.
Carburetor idle screw needs set.
that is adjusted after the bike is warmed up to operating temperature, then set idle.
If that doesn't have you cleared up then you'll need to have your carbs cleaned.

Have a great weekend
Big Al

May 21, 2011 | 2000 Suzuki VZ 800 Marauder

1 Answer

Bike starts right up in choke take it off choke shuts off


when you rejetted, did you also change the idle jets or just the main jets? if you didn't change the idle jets, that would probably help. remember you might also want to raise the float level height just a little bit to compensate for the extra fuel going out.

May 14, 2010 | 1993 kawasaki VN 750 Vulcan

1 Answer

The bike idles and runs great at idle but if I rev the engine and let go of the throttle there is a little rattle. Also if i crank the throttle it will rev to around 7500 and at wide open throttle the rpms...


the rattle may just be vibration or a failin bearing-old bike--carb shud be takin apart-cleaned-and ajusted if problems get worse--buy a repair manual thats what the pros use

Apr 10, 2010 | 1984 Honda VT 500 C Shadow

1 Answer

Drives great but at/when drops to idle it stalls


When you are on the bike and riding do you still have the choke out? And stop spraying starter fluid into the carbs..bad bad bad.... bikes start with out that stuff and if you need it then something is wrong.. your gonna mess something up doing that....let me know about the choke and we will go from there...cj_monaco@hotmail.com

Jun 21, 2009 | 1990 Suzuki GSX 750 F (Katana)

2 Answers

I got a 1990 Suzuki GSX750F Katana, the problem is that when I pull the choke out and start it up it will idle, now if I take right off it rides great, but when I come to a stop or hold the clutch long...


It still sounds like it still running rich. If it doesn't have any performance mods like aftermarket exhaust it wont like the stage 3 kit. The stage 3 kit should be install if it has high performance exhaust and k&n pods instead of an airbox and filter. Or the floats may be stuck or improperly adjusted.

Jun 21, 2009 | 1997 BMW R 80 R

1 Answer

Idling the bike,wont hold an idle


It sounds as if you have dirt in your fuel line or some bad gas.
I would recommend draining your tank and cleaning it, then replace your fuel filter.

Dec 03, 2008 | 2002 Yamaha DT 125 R

Not finding what you are looking for?
1975 BMW R 90 S Logo

Related Topics:

234 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4525 Answers

yadayada
yadayada

Level 3 Expert

76164 Answers

phil cuzins
phil cuzins

Level 2 Expert

79 Answers

Are you a BMW Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...