Big Bear Valve Lash

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killjoy159

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Can any of you folks tell me what the factory specs are for the valve lash on a 1997 Big Bear with the Yfm350?
 
Stock Warrior Cam
.341" lift I/E
Valve Lash .00236-.00394" I / .00630-.00787" E
Duration 233 degrees @ .40"
LSA 108 degrees
 
1987 thru 1999 Big Bear is
Intake: .06 - .10mm or .002 - .004 inch
Exhaust: .16 - 20mm or .006 - .008 inch
These are measured cold.
Can you please tell me how to know when I'm at Top Dead Center? I've got a mark on the fly wheel that is an F with a line and a few degrees later is a line but I'm not sure which stroke is the right compression stroke? Any help appreciated. My machine is a 1998 BB 350 4x4
 
The next mark after the F is a T as seen through the timing hole. That is TDC.
 
Hi every one I'm new here an looking for help to get my 99 bb 350 going again an what to do I'm not good at this small engine stuff but I like to get help an be explain to on what to do by anyone please my 99 bb 350 was running good till about 2 weeks a go I switched it off an it's failed to run again it hasn't ever had a battery on it since Iv got it so Iv used the pull crank rope on it cuz it was fairly easy to start with one good pull or 2 but last ride on it ran good switched it off now it won't run it has new cdi an instater it is getting spark it's seems to be getting gas but it won't run Iv pull it behind another atv an it bust off but back fires an pops an won't take gas or idle just one lol touch of gas it run but spit an sputter an then die an it's hard to pull rope crank now it's got bad snatch back it brank your had just about when it does it Iv looked at the cam timeing an lined the mark up an it seems to be on time there but not sure on the crank or flywheel timeing mark there but also it seems that the starter engages when using the pull rope now odd I say an it get a wine an drag noise when it happens an then it click an disengages an no start sounds them it seems to do it every time it snatchs back hard would like help on what to do an look for an hope to get it running again where do I start on this fix it didn't smoke a bit cold or hot an didn't make any wired or funny noises when running it was strong when it ran so I'm not sure what happened any help or experience would be appreciated thanks
 
Hi every one I'm new here an looking for help to get my 99 bb 350 going again an what to do I'm not good at this small engine stuff but I like to get help an be explain to on what to do by anyone please my 99 bb 350 was running good till about 2 weeks a go I switched it off an it's failed to run again it hasn't ever had a battery on it since Iv got it so Iv used the pull crank rope on it cuz it was fairly easy to start with one good pull or 2 but last ride on it ran good switched it off now it won't run it has new cdi an instater it is getting spark it's seems to be getting gas but it won't run Iv pull it behind another atv an it bust off but back fires an pops an won't take gas or idle just one lol touch of gas it run but spit an sputter an then die an it's hard to pull rope crank now it's got bad snatch back it brank your had just about when it does it Iv looked at the cam timeing an lined the mark up an it seems to be on time there but not sure on the crank or flywheel timeing mark there but also it seems that the starter engages when using the pull rope now odd I say an it get a wine an drag noise when it happens an then it click an disengages an no start sounds them it seems to do it every time it snatchs back hard would like help on what to do an look for an hope to get it running again where do I start on this fix it didn't smoke a bit cold or hot an didn't make any wired or funny noises when running it was strong when it ran so I'm not sure what happened any help or experience would be appreciated thanks
Does it have a decompression that could've stopped working?
 
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