scottie_b205 Posted November 27, 2009 Report Share Posted November 27, 2009 (edited) Any ideas on how to break my SWM 240s countershaft sprocket nut. Penetrating oil is doing nothing. I stuffed a block of wood between the rear wheel and swingarm, sat on the rear tire, applied heat with mapping gas to the nut, and had a breaker bar with a long pipe on top of it and the nut won't move. The chain is still attatched and another block of wood is behind the rear tire and it just spins the rear wheel. I can't see the nut being reverse threaded. I haven't heated the nut cherry red. I think it will hurt the countershaft itself. My impact gun isn't doing half of what the breaker bar is doing. Any ideas? Edited November 27, 2009 by scottie_b205 Quote Link to comment Share on other sites More sharing options...
john.b Posted November 27, 2009 Report Share Posted November 27, 2009 Is it fitted with a tab washer behind the nut, you have bent the tab back have n't you? Quote Link to comment Share on other sites More sharing options...
woodbutcher Posted November 27, 2009 Report Share Posted November 27, 2009 DRILL A 2.5MM HOLE INTO SPROCKET NUT FACE , ( NARROWEST SECTION BETWEEN THREADS AND SPROCKET NUT FLAT ) THEN WITH FINE ( 1MM ) DREMMEL CUTTING WHEEL CUT FROM NUT FLAT INTO 2.5MM HOLE . THIS DOESN`T HAVE TO BE ALL THE WAY THRU AND THEN STRIKE THE NUT WITH HAMMER AND PUNCH IN AN ANTI CLOCKWISE DIRECTION WITH ENGINE IN NEUTRAL AND REAR WHEEL ON GROUND THIS WILL SNAP THE NUT WHERE THE HOLE WAS DRILLED AND LOOSEN ITS GRIP ON SHAFT AT SAME TIME . OF COURSE ALL THIS WILL BE USELESS IF YOU HAVE NOT GOT A SPARE NUT Quote Link to comment Share on other sites More sharing options...
scottie_b205 Posted November 29, 2009 Author Report Share Posted November 29, 2009 Well I took Woodbutchers advice and knocked a piece off of the nut. I drilled two holes and dremalled across them. I knocked the piece off and since there was an edge I took a drift, placed it on the edge, and hit it with a hammer a few times. The nut finally spun. I had to pry the lock washer off then tap the back of the sprocket in a circular pattern to get that off. Now I have a new problem. I broke the rest of the bike down to have the frame repainted. When I was taking the forks off, the bottom triple clamp pinch area just about broke off. I believe it was stressed to begin with. It's cracked all the way across. Someone replaced the SWM fork leg with a Betor fork leg from a Bultaco on that side. The handle bar also looks as if it took a hit on that side. Anyone know where I might find a triple clamp? Scott Quote Link to comment Share on other sites More sharing options...
martinm Posted November 29, 2009 Report Share Posted November 29, 2009 Try sending Jim....Virginiatrials....on this forum a message. Last I heard he had a spare set of yokes that would fit your bike. Cheers Martin Quote Link to comment Share on other sites More sharing options...
scottie_b205 Posted December 2, 2009 Author Report Share Posted December 2, 2009 Martin, Thank you for the reply . Jims yokes are in the mail. Quote Link to comment Share on other sites More sharing options...
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