Reply
 
LinkBack Thread Tools Display Modes
Old 08-18-2012, 08:22 AM   #1
Endorsed
smoak's Avatar
OP
 
Joined: Apr 2011
From: Kirkland, WA

I Ride: 1982 Yamaha Maxim XJ650
What would cause my bike to do this?
Yesterday and Thursday I rode to work on my bike with no issues. However, on the ride home (on both days) my bike slowly lost power and then just died as if it was out of gas even though the tank was at least half full. It would not start again until I let it sit for a few minutes, but eventually it died again while riding it home.

The bike was running fine in the morning with no apparent issues. It was pretty hot yesterday and Thursday, could the bike have overheated? It is air cooled and I was in slow moving traffic on both days.

Could a bad battery cause this issue? I don't know how old my battery is, but a few weeks ago I did have to top it off with distilled water and charge it.

My bike is an 82 Yamaha Maxim XJ650. Does anyone have any ideas?

__________________
Follow PNW Riders on Facebook and Twitter
 

Old 08-18-2012, 08:28 AM   #2
Moderator
RedKat600's Avatar
 
Joined: May 2011
From: LaCenter, WA

I Ride: 2003 Copper SV1K
Coils overheating and losing spark.....gas boiling in the carb bowls...hard to say without testing it.

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-18-2012, 08:44 AM   #3
Streetfighter
Mitch F's Avatar
 
Joined: Jun 2006
From: The Ham

I Ride: every god damn day
I'll put my money on a clogged fuel filter

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-18-2012, 09:41 AM   #4
Moderator
dragracer1951's Avatar
 
Joined: Sep 2005
From: Bremerton

I Ride: 05 KTM 625smc, 03 Are See fiddy one, 05 DRZ470SM, 95 FZR1040, 69 Combat Commando Roadster, 73 Commando Interstate, 67 BSA B44, 71 BSA B50
Or a clogged gas tank vent

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-18-2012, 10:19 AM   #5
Picture Whore
shelbyguy's Avatar
 
Joined: Apr 2008
From: lacey

I Ride: Aprilia Factory, 525SMR, DRZ400sm, and a gaggle of others
“ Quote:
Originally Posted by Mitch F View Post
I'll put my money on a clogged fuel filter
“ Quote:
Originally Posted by dragracer1951 View Post
Or a clogged gas tank vent
first thoughts

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-18-2012, 10:53 AM   #6
Endorsed
smoak's Avatar
OP
 
Joined: Apr 2011
From: Kirkland, WA

I Ride: 1982 Yamaha Maxim XJ650
“ Quote:
Originally Posted by Mitch F View Post
I'll put my money on a clogged fuel filter
How do I tell if it's clogged? The fuel filter looks about half full of fuel.

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-18-2012, 11:13 AM   #7
Railer
WaGigKPN's Avatar
 
Joined: Mar 2012
From: Gig Harbor, WA
Blog Entries: 1

I Ride: 2000 BRP (XR650R)
If its an in line visual filter just replace cause they r cheap.

Prob not coil over heating b/c it would take longer than a couple min for it to cool down and even if it did it would over heat very quickly.

On a bike that old and if it only happens when hot i would think tank not venting.

It seems your issue is between gas tank and carbs

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-18-2012, 11:31 AM   #8
Endorsed
smoak's Avatar
OP
 
Joined: Apr 2011
From: Kirkland, WA

I Ride: 1982 Yamaha Maxim XJ650
“ Quote:
Originally Posted by WaGigKPN View Post
If its an in line visual filter just replace cause they r cheap.

Prob not coil over heating b/c it would take longer than a couple min for it to cool down and even if it did it would over heat very quickly.

On a bike that old and if it only happens when hot i would think tank not venting.

It seems your issue is between gas tank and carbs
Ok, it's an inline filter so I'll try replacing it first.

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-22-2012, 07:31 PM   #9
Endorsed
smoak's Avatar
OP
 
Joined: Apr 2011
From: Kirkland, WA

I Ride: 1982 Yamaha Maxim XJ650
“ Quote:
Originally Posted by Mitch F View Post
I'll put my money on a clogged fuel filter
Put in a new fuel filter and it happened again today. It may be a venting issue at this point.

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-22-2012, 08:52 PM   #10
Endorsed
 
Joined: Jan 2011
From: Vancouver, WA

I Ride: '82 Yamaha XJ1100J
I have an '82 X1100, and it has a vacuum actuated valve that allows fuel to flow from the tank when the engine is running. The vacuum from the running engine actuates the valve and allows it to flow fuel.
The petcocks can be set to four different settings...off, on, res, and pri...pri is short for prime which bypasses the vacuum valve (so you can start the engine if it has been sitting a long time and or the carbs have been drained). You can try running the bike with the petcock set to prime and see if the problem goes away. I would caution against leaving the bike sit like that as these old bikes tend to have leaky floats in the carbs...and with no vacuum valve to shut the fuel off you can literally fill your engine with fuel...or worse dump most of your tank out on the garage floor and blow up your garage.
If yours is similar it could be that the vacuum valve diaphragm has a leak in it and won't stay open. You can buy a rebuild kit cheap off of Ebay.
Some of the XJ's have the similar vacuum valve built into the petcock itself...and I would imagine they could have similar issues. Again you'd need to rebuild the valve and/or petcock(s).
By far the best source for this era of Yamaha XJ's is www.xjbikes.com forums. Hard to beat as a source of info for XJ's.
Hope this helps...
Mike

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-22-2012, 08:59 PM   #11
Novice Racer
WTFO's Avatar
 
Joined: Jul 2007
From: An unstated X,Y,Z coordinate

I Ride: 09 Blk Daytona 675 (better than hoochie), BLK/Silver 06 Tiger, Red 04 R1, Yellow 99 Daytona 955i
Run it till it dies then open the gas tank filler cap - leaving it open - and then try and restart it - if it fires up OK and seems to run OK then you probably got a clogged tank vent

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-22-2012, 09:06 PM   #12
Endorsed
 
Joined: Jan 2011
From: Vancouver, WA

I Ride: '82 Yamaha XJ1100J
BTW, the tank vent is in the cap...the tend to get rusty and clog.

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-22-2012, 09:47 PM   #13
Track School Dazed
james1300's Avatar
 
Joined: Oct 2005
From: CENTRAL

I Ride: When I can
“ Quote:
Originally Posted by WTFO View Post
Run it till it dies then open the gas tank filler cap - leaving it open - and then try and restart it - if it fires up OK and seems to run OK then you probably got a clogged tank vent
Listen when you open it. Sometimes you can hear air entering the take. Like the 'doors' on the starship 'Enterprize'. I'd have said 'sucking' but that would have sent this group into hyperdrive. Gotta watch your back with this crowd!

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-24-2012, 08:13 PM   #14
Newbie
Psychotinner's Avatar
 
Joined: Jul 2012
From: Ford, Washington

I Ride: 1980 CB750K and whatever else i can get my grubby mitts on.
The petcock can also become clogged, especially if it has a 90 degree bend in it. It happened to me.

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-24-2012, 08:16 PM   #15
Novice Racer
ZXWUT?'s Avatar
 
Joined: Sep 2007
From: Kent, WA

I Ride: 05 KTM 625 SMC
“ Quote:
Originally Posted by james1300 View Post
Listen when you open it. Sometimes you can hear air entering the take. Like the 'doors' on the starship 'Enterprize'. I'd have said 'sucking' but that would have sent this group into hyperdrive. Gotta watch your back with this crowd!
But you just said sucking

__________________
Follow PNW Riders on Facebook and Twitter
 
Old 08-24-2012, 08:38 PM   #16
Novice Racer
WTFO's Avatar
 
Joined: Jul 2007
From: An unstated X,Y,Z coordinate

I Ride: 09 Blk Daytona 675 (better than hoochie), BLK/Silver 06 Tiger, Red 04 R1, Yellow 99 Daytona 955i
“ Quote:
Originally Posted by ZXWUT? View Post
But you just said sucking
What is sucking what ???

__________________
Follow PNW Riders on Facebook and Twitter
 
Reply

  PNW Riders > PNW Riders > Mechanical & Technical


Thread Tools
Display Modes



/pnwriders @pnwriders PNW Riders RSS Feed