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Forums › XJBikes Talk › XJ Chat › idle problem
idle problem
Technical discussion ONLY for XJ Maxim/Seca...
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cmac992000
Gear grinder


Joined: Feb 01, 2010
Posts: 7
Location: daphne,alabama

PostPosted: Wed Feb 03, 2010 2:11 am    Post subject: idle problem Reply with quote

not sure what the problem is think it might be carb. when i start the motor i have to use choke and have to leave it on prob. like half the way rpm way to high help me please
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skillet
Red Liner


Joined: Oct 09, 2009
Posts: 586
Location: SW TN

PostPosted: Wed Feb 03, 2010 11:26 am    Post subject: Re: idle problem Reply with quote

Sounds like carb cleaning time. I had same problem and it made for black sooty plugs. Cleaned carbs and problem fixed. Check the how-to's with pics for the cleaning your carbs...

skillet
BTW I had never done carbs before and was REAL worried. Follow how-to and it was OK Wink

_________________
'81 XJ750 seca
We all come here naked, screaming and covered in blood. If you're careful....it doesn't have to end there!
You keep saying PSYCHO like it's a bad thing.
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Krashen
3rd gear
3rd gear


Joined: Feb 01, 2010
Posts: 93
Location: Mason City, Iowa

PostPosted: Wed Feb 03, 2010 11:31 am    Post subject: Re: idle problem Reply with quote

Had The same problem with my 550 when i got it just foolow the how-tos they do a really good job of going step by step.

_________________
Nut up or Shut up!
1982 XJ 550 Maxim (The Trooper)
15,xxx miles Running but looks terrible
Under Cunstruction to be bobbed

1982 XJ 550 Maxim (Restoring)
14,xxx miles Needs to start
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seaguy
6th gear
6th gear


Joined: Nov 08, 2009
Posts: 356
Location: Coastal,AL

PostPosted: Wed Feb 03, 2010 2:45 pm    Post subject: Re: idle problem Reply with quote

Ditto to the above. Pay particular attention to the pilot fuel inlet made into the carb bowl you'll see a buldged out thing with a hole in it (engine side). in the bottom of the hole is a jet that takes a 1st (smallest) string of a guitar to fit it. I would bet on one or more being stopped up. Stop by a stringed instrument music shop and ask for a scrap. They'll probably give you a handful. Use gumout carb cleaner with the red spray pipe. Spray n poke, spray n poke etc. eventually you will see it spray out the bottom. If you can't do anygood PM me. I live over in Orange Beach.

_________________
1st bike: Fox mini bike,1st mod:installed an Indian 45cu " in my Cushman Eagle frame
1st crash: Honda 125 twin
Stable: 74 CB350,71 750 Commando,82 XJ650 Maxim
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midnightblu
6th gear
6th gear


Joined: Feb 17, 2009
Posts: 338
Location: Austin, TX

PostPosted: Wed Feb 03, 2010 4:55 pm    Post subject: Re: idle problem Reply with quote

Possibly a vacuum issue in the boots or vacuum caps lok for leaks

_________________
1985 Maxim XJ700N
7mm accel copper wires hard wired /chopped into the coils.
New resistor caps.
Full tear down of carbs / cleaned/ bench synched.
engine casings polished
new fork seals / dust boots and 15wt fork oil.
new front and rear brakes /calipers rebuilt

120Miles Per Day - Daily Driver
42Mpg
29,000 miles and climbing

Do it right or do it twice!
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chuckles_no
Red Liner


Joined: Nov 16, 2009
Posts: 663
Location: wisconsin

PostPosted: Wed Feb 03, 2010 5:07 pm    Post subject: Re: idle problem Reply with quote

well... a couple of trouble shooting areas are taken care of by the above post. Obviously, even with clean carbs, sometimes, we can experience these same problems.
I am just learning these things, myself. but I do know, while your choke is half way up, you are going to get the high idle. As the bike warms the idle will probably go way up. Is the problem happening during op temperature?

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'82 xj550 maxim
xjbikes.com/Forums/vie...22356.html

There are two types of riders. The ones who've dropped a bike and the ones that will drop a bike.
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midnightblu
6th gear
6th gear


Joined: Feb 17, 2009
Posts: 338
Location: Austin, TX

PostPosted: Wed Feb 03, 2010 5:14 pm    Post subject: Re: idle problem Reply with quote

precisley, if there is not enough vacuum to pull the fuel without the choke then it will not idle. This is ofcourse with a clean fuel pilot circut. if the circut is clogged or dirty well then, there is the problem.

Vacuum is initially easier to check than a carb break down Smile

_________________
1985 Maxim XJ700N
7mm accel copper wires hard wired /chopped into the coils.
New resistor caps.
Full tear down of carbs / cleaned/ bench synched.
engine casings polished
new fork seals / dust boots and 15wt fork oil.
new front and rear brakes /calipers rebuilt

120Miles Per Day - Daily Driver
42Mpg
29,000 miles and climbing

Do it right or do it twice!


Last edited by midnightblu on Wed Feb 03, 2010 6:13 pm; edited 1 time in total
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Krashen
3rd gear
3rd gear


Joined: Feb 01, 2010
Posts: 93
Location: Mason City, Iowa

PostPosted: Wed Feb 03, 2010 5:56 pm    Post subject: Re: idle problem Reply with quote

Speaking of boots mine are in pretty bad shape is there a good way to seal them? or Cheap new ones? all i can find is like $100+ i don't really have much cash so any home remidies would be awesome! I did but some sealent on the out side but i dont know if that will do the trick?

_________________
Nut up or Shut up!
1982 XJ 550 Maxim (The Trooper)
15,xxx miles Running but looks terrible
Under Cunstruction to be bobbed

1982 XJ 550 Maxim (Restoring)
14,xxx miles Needs to start
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skillet
Red Liner


Joined: Oct 09, 2009
Posts: 586
Location: SW TN

PostPosted: Wed Feb 03, 2010 6:04 pm    Post subject: Re: idle problem Reply with quote

A member has got a set for sale on the "sell, trade, swap and wanted" page. You might try black RTV. Has worked for a number of folks (and CHEAP)...

skillet

_________________
'81 XJ750 seca
We all come here naked, screaming and covered in blood. If you're careful....it doesn't have to end there!
You keep saying PSYCHO like it's a bad thing.
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midnightblu
6th gear
6th gear


Joined: Feb 17, 2009
Posts: 338
Location: Austin, TX

PostPosted: Wed Feb 03, 2010 6:18 pm    Post subject: Re: idle problem Reply with quote

depends on how they are cracked... ther have been a few folks repair them with success but its alot of cleaning and prep work. I want to say i remember somone splitting them pulling the insert and home fabricating some from home depot stuff... gonna see if i can dig up more information on it.

_________________
1985 Maxim XJ700N
7mm accel copper wires hard wired /chopped into the coils.
New resistor caps.
Full tear down of carbs / cleaned/ bench synched.
engine casings polished
new fork seals / dust boots and 15wt fork oil.
new front and rear brakes /calipers rebuilt

120Miles Per Day - Daily Driver
42Mpg
29,000 miles and climbing

Do it right or do it twice!
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View user's profile
skillet
Red Liner


Joined: Oct 09, 2009
Posts: 586
Location: SW TN

PostPosted: Wed Feb 03, 2010 10:42 pm    Post subject: Re: idle problem Reply with quote

If not mistaken, originally the boots in question were from carbs to motor. The ones you make from plumbing supplies is from carbs to air box Confused ...

skillet

_________________
'81 XJ750 seca
We all come here naked, screaming and covered in blood. If you're careful....it doesn't have to end there!
You keep saying PSYCHO like it's a bad thing.
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markie
Red Liner


Joined: Jul 21, 2009
Posts: 616
Location: Suffolk, England

PostPosted: Thu Feb 04, 2010 2:50 am    Post subject: Re: idle problem Reply with quote

Krashen wrote:
Speaking of boots mine are in pretty bad shape is there a good way to seal them? or Cheap new ones? all i can find is like $100+ i don't really have much cash so any home remidies would be awesome! I did but some sealent on the out side but i dont know if that will do the trick?

Use RTV sealant with some "Tubes" cut from a bicycle inner tube. (This gives a good finish). I have done this on my XJ600. The boots looked good but there was a couple of small cuts where the clamps dug in. I took a picture and it's in my "Gallery".

The original post problem sounds like carbs to me.

_________________
Previous rides: Suzuki AP50, Suzuki GT250 (X2), Suzuki GT550, Honda 125T, Suzuki GT200, Honda CB500T, Yamaha RD250 Yamaha XJ 600

Looking for another one to love!
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