Hi all. i have a problem. I or should i say my wife loaned my xpress to my brother inlaw to pull a sled in the snow which we just got a coulple weeks back. anyway i heard him drive up in the yard when they got done, it sounded fine but that was hearing it from in the house. well we got another snow today and i went to start it up to take my kids sleding, and when i went to pull start it because my battery is trash it wass really hard to pull like it is locking up or somthing. so i took the battery out of my 250sx 3 wheeler and put in it and it wouldnt even think about it. (good attery, ran wintch fine). im woundering if it could be a valve timing issue because i can pull it just not hard or fast enough to start it. or is it somthing major. any insite would be greatly apprecaited.