luke7129 Posted June 21, 2015 Report Share Posted June 21, 2015 Hi was wondering if anyone could shed a little light on my problem i have a 1986 honda tlr 200 relfex, the bike runs and starts fine but when it gets hot it starts to rev up on its own and they dont die off, i have tried 2 new carbs and i still have the same problem. Am i missing something? Thanks Quote Link to comment Share on other sites More sharing options...
kramit Posted June 21, 2015 Report Share Posted June 21, 2015 Sounds like possibly an air leak. When it's reving high, spray some Carburetor Cleaner around the intake manifold area and see if problem momentarily improves. Quote Link to comment Share on other sites More sharing options...
andy m Posted June 21, 2015 Report Share Posted June 21, 2015 WD40 sprayed around the inlet manifold would do same trick. Quote Link to comment Share on other sites More sharing options...
luke7129 Posted June 23, 2015 Author Report Share Posted June 23, 2015 Thanks guys, im not that clued up on engines what will this tell me? Thanks Quote Link to comment Share on other sites More sharing options...
feetupfun Posted June 24, 2015 Report Share Posted June 24, 2015 The induction tract is under vacuum when the motor is idling, so if there is a leak, air will be getting in, causing the motor to run faster and leaner than it should. If carby cleaner or WD40 gets sucked in through a leak, the motor will change RPM. This helps to locate the site of the leak. 1 Quote Link to comment Share on other sites More sharing options...
luke7129 Posted June 24, 2015 Author Report Share Posted June 24, 2015 Thanks will give it a try, also what should the carb set up be as the plug is always black and dry after each trial. Any tips? Thanks Quote Link to comment Share on other sites More sharing options...
lineaway Posted June 25, 2015 Report Share Posted June 25, 2015 You have to find if there is an air leak first. You never mentioned which carbs. If you are just using another stock carb, it could be as simple as missing the o ring on the top. Quote Link to comment Share on other sites More sharing options...
4stroke Posted June 25, 2015 Report Share Posted June 25, 2015 If the carb has been removed, check the 'o' ring has room to expand in it's groove. When refitting do not over tighten the nuts or you can distort the carb body. Quote Link to comment Share on other sites More sharing options...
t-shock 250 Posted June 28, 2015 Report Share Posted June 28, 2015 I had this problem on my 250. After a LOT of messing about trying different things including new carb & ignition, the problem was a worn exhaust valve seat. New valve, & seat re-grind and the problem was 100% cured. Quote Link to comment Share on other sites More sharing options...
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