need help bike wont start
#1
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new here.i have an 02 gsxr 1000.sold my second bike to a friend.88 cbr 600 about 6 months ago.he put 13000 miles on the bike in that time.bike was running great.now has 25000 miles on clock.lost compresion in 3&4.we pulled the motor changed rings cleaned heads new gaskets also changed o rings under cylender block sleeves.put motor back in .turns over good but back fires hard through carbs &sometimes exaust.we did set timing by the book.then pulled valve cover and double checked settings.any suggestions?thanks for any advise.could carbs be the problem?
#3
#4
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Did anybody play with the idle screw at all? Make sure the bike is getting fuel. I rebuilt my EX500 engine over a period of a couple weeks and had people in and out of the garage. I put it back together and had the same symptoms you are describing. I tore it apart and inspected the cams and I had them installed correctly. I found the idle screw was turned out all the way and the bike was not getting fuel. The incident was resolved by turning the screw a few times. I was pissed and relieved at the same time.
#6
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Well, I'd start with a compression gauge and go from there. Check fuel, spark, air, compression. Did you install any rags or towels into the intake ports while the engine was pulled? Maybe you left a rag in there somewhere. (not trying to call you an idiot, I've seen it happen before)
#8