Got a 2001 400 big bear has good spark but won't fire off. I was told by a friend that it might have jumped time how would I go about timing this model
SOURCE: yamaha big bear no spark
I'm not familiar with all quads and all the kill switch locations. Does it have a tip-over kill switch? Is it working? Is the quad in neutral? Is the neutral light on? Many engines will not spark if the neutral light is not on. Are the headlights off when starting?
How good is your battery? A low battery can kill spark. Test for spark by grounding the threads of the plug against the cylinder. Have a friend kick the bike while you watch for spark. Assuming no spark, then check all the kill switches with an Ohmmeter to be sure each switch is working properly. Sometimes a switch goes bad. Try disconnecting all kill switches then check spark.
Check the wiring harness, even under the gas tank and seat. Are all the connectors clean and with a tight connection? Any abraded wires? Check the ignition switch also. The switch can go bad as well. Are the flywheel coils good > is the battery getting a charge?
Still no spark? If CDI then get it checked.
If points then file or replace them along with a new condensor and reset the gap then time the engine. >> I hope this helps.
Please rate this answer. Thanks trsrhntr!
SOURCE: my yamaha 2008 big bear 400 will not stay running
Time for a carb cleaning. Take off the carb, take it to someone with a sonic cleaner. Change your spark plug, clean out your tank (Take out the fuel shut off valve before you do this as there is a very delicate filter on the shut off valve that could be damaged otherwise), and replace your air filter. How long you want this repair to work is directly dependent on how well you clean everything. Even if you do a perfect job on the carb, a dirty tank will take it back out in a matter of minutes. a dirty, fouled or weak spark plug will hinder your efforts, and the carb cannot mix air it is not getting.
SOURCE: looking for the prooper way to hook up a throttle
Just remember bend no more then 90 degrees on the cable. You may have to get a manual
SOURCE: Is the stator on a 2001 big bear 400 yamaha four
Hi, yes I think it should, quite a few 4 stroke engines do, hope this helps :)
SOURCE: set the timing on a yamaha 250 bruin 4-wheeler
make sure the pison is on top dead centre(look through the small timing plug hole down the bottom) There is a punch mark on each cam sprocket that aligns with the cylnder head surface. the cam lobes facing away from the lifters
Im trying to up load an image of the page in the manual
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