pugslee Posted December 15, 2011 Report Share Posted December 15, 2011 Hi Had the bultaco out at the weekend and managed to stall it on some rocks. When i started her back up and put her in first, she went backwards and had me bent over the bloody handlebars. Tried all gears and every one was in reverse. Has any body ever heard of this. Got her back home on a trailer and started her up last night and all is well again. How can a bike run in reverse. Cheers A very puzzled owner Quote Link to comment Share on other sites More sharing options...
monty_jon Posted December 15, 2011 Report Share Posted December 15, 2011 (edited) Hi Had the bultaco out at the weekend and managed to stall it on some rocks. When i started her back up and put her in first, she went backwards and had me bent over the bloody handlebars. Tried all gears and every one was in reverse. Has any body ever heard of this. Got her back home on a trailer and started her up last night and all is well again. How can a bike run in reverse. Cheers A very puzzled owner Yes, I used to have a KTM that did it on the odd occasion I retarded/advanced (can’t remember) the ignition very slightly, problem solved Check your timing Edited December 15, 2011 by Monty_Jon Quote Link to comment Share on other sites More sharing options...
airwave Posted December 15, 2011 Report Share Posted December 15, 2011 uncommon but not unheard of for a two stroke to run backwards. the ignition timing will be off, but with a healthy plug, it won't make that much difference, Never heard of it doing any damage either. Quote Link to comment Share on other sites More sharing options...
airwave Posted December 15, 2011 Report Share Posted December 15, 2011 as to the puzzlement, assuming it's a two stroke bike (never heard of a 4st doing it) the only thing reversed is the rotation of the engine. if you think through what the engine is doing, it makes very little difference to crankshaft which way it rotates and no difference to the piston (as it doesn't actuallt rotate at all) the ignition timing will be off but everything else, reeds, carb, "Reek spoot" will all be functioning normally. Quote Link to comment Share on other sites More sharing options...
b40rt Posted December 15, 2011 Report Share Posted December 15, 2011 Quite common on Bultaco's, timing as said above. Even more fun when your half way through a section and it does it, well fun for anybody watching. Quote Link to comment Share on other sites More sharing options...
sherpa325 Posted December 15, 2011 Report Share Posted December 15, 2011 Yes is it common on bullys, it is a result of the timing being too far advanced and if you don't give it a decent kick when starting, as the piston is just about to reach TDC the plug ignites too soon sending it back the way it came, generally you can pick a different exhaust note as well Cheers Greg Quote Link to comment Share on other sites More sharing options...
pschrauber Posted December 15, 2011 Report Share Posted December 15, 2011 I does not only sound weird it runs poor also. Remembering when I was a teen we tried to get the Bul running backwards on purpose, because we thaught it was "so cool". In fact it was difficult to do so, rolling back- wards from a hill for get it started had sometimes success. (After we discoverd that it not only sounded weird, ran very bad and steering + balacing was quite difficult our curiousness was pleased.) Quote Link to comment Share on other sites More sharing options...
toothandnail Posted December 15, 2011 Report Share Posted December 15, 2011 My brother had a modified yam banshee that did it on a regular basis , it ran perfect that way . You NEVER started it up and dumped the clutch , well only once Quote Link to comment Share on other sites More sharing options...
charliechitlins Posted December 15, 2011 Report Share Posted December 15, 2011 It's a bummer when a kid (or anybody!...but I think it happens more to kids) stalls on a hill, the bike rolls backward and fires up. Very frightening! Quote Link to comment Share on other sites More sharing options...
pugslee Posted December 20, 2011 Author Report Share Posted December 20, 2011 Thanks for the replys. Quote Link to comment Share on other sites More sharing options...
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