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Message started by fisherman on 07/01/20 at 03:39:16

Title: Bike will not Idle
Post by fisherman on 07/01/20 at 03:39:16

I bought this in Sept. 2019 9000 miles and has a Raptor petcock......
Savage LS650 with a Mikunibs40 Carb....put about 300 miles on last oct. filled the Gas and stabil.. put away till this May...Had riden about 40 miles this year when I was coming to a stop or downshift to lower rpms.. wanted to die. I took it out 2 weeks ago and ended up pushing it home about 2 miles...just died and I cranked it dead trying to start again. Since then I have changed the gas, did a SeaFoam soak in the carb for 24 hrs. cleared all the vacuum leads, and changed the fuel line. and set the idle mix screw to recommended . Now when I start it.. it runs very strong till it warms and the idle drops. If I do not touch the throttle it will run strong for about 10 mins, stumble and die. If I throttle up during this time it will immediately stumble and die. ... it is a 1995.


Title: Re: Bike will not Idle
Post by Gary_in_NJ on 07/01/20 at 06:04:56

What is the condition of the spark plug and air filter? What jets are installed? What is the condition of the vacuum diaphragm for the slide? What is the condition of the slide?

A few things can cause the warm running issues you are having (such as valve clearance and the coil), but before I start making suggestions, you need to run down the easy things.

Title: Re: Bike will not Idle
Post by fisherman on 07/01/20 at 06:11:07

New spark plug gapped at .32..I am having the carb rebuilt this week. as I would not know a problem with it if I was looking at it. I am hoping this will take care of the issue. If not I will be back here asking for other suggestions. Thank you for your response.

Title: Re: Bike will not Idle
Post by LANCER on 07/01/20 at 08:01:19

Hopefully your carb will be returned to you fully functional, but if not consider......
If fuel is flowing to the carb from the tank properly, and the plug is good and you have spark, then the problem is likely still inside the carb.
Completely disassemble, remove/clean/check every jet, clean/check every passageway for air/fuel flow with air/carb cleaner/carb cleaning tool.
This will solve the issue or show you what part may be causing it.

It does take some time to do (pretty easy for an afternoon) but it can save you lots of frustration and additional down time.
It can teach you a lot about the carb in the process as well.

Title: Re: Bike will not Idle
Post by justin_o_guy2 on 07/01/20 at 09:21:37

.I am having the carb rebuilt this week..

Any parts that get replaced,, you want the old ones..

How did ya find a qualified carb mechanic?

Title: Re: Bike will not Idle
Post by fisherman on 07/01/20 at 14:03:59

engine and Carb garage close to home, specializes in Harley work , but the Mechanic/ Owner was very interested in helping & confident he could fix the problem. If yo would like the name i can give it, wasn't sure it would be cool to do so without asking

Title: Re: Bike will not Idle
Post by justin_o_guy2 on 07/01/20 at 16:34:10

Im not needing it,, but thanks,, just checking to see if you hired the guy who mows lawns and fixes junk mowers or a mechanic,,Sounds like you got a qualified person,

Title: Re: Bike will not Idle
Post by fisherman on 07/02/20 at 04:31:29

Best I could find after reading some reviews..will definitely let you know the outcome!!!....VROOM VROOM



Title: Re: Bike will not Idle
Post by fisherman on 07/13/20 at 13:39:09

the person who is doing the rebuild of my carb found that after soaking the float for a while...it did not float anymore...can you give me any suggestions on where I can order a replacement float, it seems his aftermarket suppliers can't help???

Title: Re: Bike will not Idle
Post by norm92de on 07/13/20 at 14:15:39

Try Ron Ayers or Bike Bandit. One of them should have an OEM float.

Could the mechanic repair the old float?

Title: Re: Bike will not Idle
Post by Gary_in_NJ on 07/13/20 at 14:58:37

Our floats are plastic and can’t be braised.

Title: Re: Bike will not Idle
Post by Dennisgb on 07/13/20 at 15:04:46

Mikuni parts are readily available.

https://www.ebay.com/p/171171795

Title: Re: Bike will not Idle
Post by fisherman on 07/22/20 at 03:54:27

Ok ..I finally got the carb back from the shop. seems there were quite few things going on with it, Jets F-dup, and the float was shot. now I need a procedure recommendation on installing it  ie; air box boot on the box , or put it on after the carb is on?....suggestions??

Title: Re: Bike will not Idle
Post by Gary_in_NJ on 07/22/20 at 06:15:09

There's no magic to getting it on. Personally I find it easier to install without the tank in place. I also find it easier to install rotated 90 degrees from center. Other than that, don't be afraid to man-handle it into place. The boots are rubber and can be moved where they have to go.

Title: Re: Bike will not Idle
Post by fisherman on 07/22/20 at 08:00:00

yup you are right about the manhandle, put the air box boot on first and twisted it in.. thanks for your response...now for the rest.....

Title: Re: Bike will not Idle
Post by justin_o_guy2 on 07/22/20 at 09:42:51

Its a bit like gettin out of a wet bathing suit,, theres no directions, you KNow what the goal is,, ya grab that murfugger and get to rasslin, till it agrees with you about where it otta BE..

Title: Re: Bike will not Idle
Post by Dave on 07/22/20 at 18:05:19


5C5349525F48575B543A0 wrote:
need a procedure recommendation on installing it  ie; air box boot on the box , or put it on after the carb is on?....suggestions??


As the rubber ages, it becomes stiff and maybe even a bit smaller - eventually it makes the job nearly impossible and a new part may be necessary.  I had to get new rubber boots for my 2002 Ninja 250 a couple years ago.  After 16 years they had just become too stiff to get refitted - and they are really jammed in a tough place to access.

Title: Re: Bike will not Idle
Post by justin_o_guy2 on 07/22/20 at 18:43:58

You can TRy going to a copy repair outfit and see if they still have any fuser oil.. Its 100% silicone oil,, rub the rubber down and let it sit a while,, youll see if it drinks it,, add more. If that wont make it pliable, nothing will,,
If you can get a pint for 5 bucks,, thats stroking,, and will last for years, its great to detail the bike before ya wax it,, or the car, the rubber strips under the windows wont ever crack if ya treat them,,
I know,, The crap at the autoparts store for the dash,, Phhht,, Its got VOCs that evaporate and leave the plastic dry,,
Armorall,, thats the name of it,, I dont like that stuff,,,
A piece of tee shirt on a couple of fingers, DROPS of oil, sread on the dash,, Do that a few days in a row,, Itll stop drinking it up,,

Title: Re: Bike will not Idle
Post by fisherman on 07/23/20 at 04:48:25

THANKS FOR ALL THE HELP..IT IS APPRECIATED ;D

Title: Re: Bike will not Idle
Post by norm92de on 07/26/20 at 13:33:04

Gary in NJ wrote:

Our floats are plastic and can't be brazed (soldered)

My bike is a 2014 model and the float is as bold as brass.  :-?

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