Flooding/Hard to start after a fall or stall
Posted January 03, 2001 - 10:19 PM
Any help is appreciated. This set me back about an hour or more and I was almost dead by the time the thing started. Other than that no starting problems (for those of you who remember my Moab difficulties) however, still backfires when I kill the engine.
Posted January 04, 2001 - 12:34 AM
Originally posted by Harold in So Cal:
...Each time I would pick it up, open the hot start, find TDC and try to kick it over, it wouldn't start. Then I would pull in the compression release, kick it through about 10 to 20 times and then find TDC and still it wouldn't start. I was very carefull not to touch the throttle.
Did you try without using the hot start knob? I hardly ever use it. My bike starts fine without the hot start when stalled hot. Have fallen only twice in 12000 km, so don't remember how I started after a fall...
I have understood, that when you kick the bike with the compression release held, you should have the throttle wide open. I believe this is used to dry the plug.
Posted January 04, 2001 - 06:19 AM
Did you ever have that bike checked out at the shop?
Did you check out the TPS? Grab yourself a multi-meter and follow the book.
How about your float level?
One thing you can try is removing that vent check valve off of your tank's vent line. I do know several of us have removed it, including the Guru Clark. It is one less variable to screw with.
'99 WZ with all YZ mods, FMF PowerBomb header, Stroker SX-1 silencer, SS front brake line, forked over by Pro-Action, OEM YZ tank and IMS seat.
Posted January 04, 2001 - 07:08 AM
Posted January 04, 2001 - 07:58 AM
Posted January 04, 2001 - 08:00 AM
[This message has been edited by Harold in So Cal (edited 01-04-2001).]
Posted January 04, 2001 - 08:21 AM
sounds like you had some trouble on Snowy.....
Kevin & the others have the right ideas - float level & TPS. I'm going to add that you check the throttle shaft adjustment - on the technical page. Just an idea.
Additional info - my '88 XR600 had the same symptoms as your bike. I couldn't start that thing for 15 minutes after a fall. The older XRs had a problem with the exciter coil on the stator assembly. I replaced the stator with a '91 or newer version and it really helped. My point? Check ALL the electrical specs for out of range values.
Your bike seems to be the anomaly on the board. I routinely stall my bike and it never takes more than 2 kicks (ok, 3 if I'm tired) to fire up with the hot start button open.
More additional info:
the steering damper pin that fits into the tower on my bike will rise due to the expansion of the air in the cavity below the pin. The grease provides a good enough seal so that I have small piston & cylinder....
Just think of the pressure that can build up in the tank if your gas cap isn't venting properly.
Posted January 04, 2001 - 08:27 AM
Take Care, Harold!
Posted January 04, 2001 - 09:47 AM
Just a thought…
So where was it - Snowy or Ridgeroute?
Posted January 04, 2001 - 10:06 PM
I know your pain.
Here are some suggestions:
1) Remove vent check valve on the tank (same as others stated above)
2) Keep a slightly fast idle setting
3) Make sure the pilot circiut is not too rich - what pilot and screw setting are you at?
4) Lower the float level 1mm
5) Do your starting procedure EXACTLY as you described.
6) Don't fall down, don't stall.
Posted January 04, 2001 - 07:58 PM
Posted January 05, 2001 - 08:47 AM
cost effective solution - XR650R or flywheel? decisions, decisions
Would the CARB vent tubes - NOT the tank vent - cause these kind of problems?
Harold - So which trail was it?
Posted January 05, 2001 - 12:48 PM
These answers (and the ones on the YZ site- yes I double dipped) have been good. I'm going to make a list and print the postings off and take my bike to Montclair Yamaha tomorrow morning. Before the supercross.
Live the dream,