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Ok I have a 83 toy with a 22r motor. It cranks but wont start. It ran fine until all of a sudden it wouldn't start. At first I thought it was the ignitor, so I replaced it. Still no start. After more investigation I noticed it has spark and it is getting gas into it, but it cranks like it didn't have spark. My question is could the timing chain have either slipped, broken or maybe a timing chain gear. I am fairly new to the 22r motor and I'm not aware of the common problems that come about from it. Could it be anything else? I would hate to try to open up the engine without exploring all other possibilities. Any information would be gratly appreciated. Thanks.