blocky Posted June 11, 2014 Report Share Posted June 11, 2014 I'm currently rebuilding a bantam D10a 4 speed engine and i've got a couple of problems.... 1. The 3rd / 4th gear selector fork keeps popping out of engagement with its dog. I'm pretty sure that the selector fork is damaged but it doesn't look like there is any breakage. I have (hopefully) attached a few pics to help explain the problem. Is the fork damaged or am I doing something else silly ? 2. I need to replace the bronze bushes in the final drive gear. Are there any hints or tips for this ? Quote Link to comment Share on other sites More sharing options...
canada280i Posted June 11, 2014 Report Share Posted June 11, 2014 I am no bantam expert but all other dogs I have seen have 2 arms to keep them in place, looks like there could be one missing where the flat part is Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted June 11, 2014 Report Share Posted June 11, 2014 is there anything that keeps it in place ,, cant see it been any good if it just flops about , as above you would expect 2 legs ,is it the correct selector ,did it have this problem before Quote Link to comment Share on other sites More sharing options...
blocky Posted June 12, 2014 Author Report Share Posted June 12, 2014 As you both say... I would also expect there to be 2 arms and I suspect that this is where the problem is but there is no indication that anything has broken off. I bought the engine off ebay in a supposedly "ready to use" condition. Needles to say that when I stripped it I found the big and little ends were scrap as were the bearings. In addition, this sector fork was disengaged but there was no sign of any broken off parts. Quote Link to comment Share on other sites More sharing options...
totalshell Posted June 12, 2014 Report Share Posted June 12, 2014 http://bsanotrun.angelfire.com/gearbox.html the internet is a room with an open door.. Quote Link to comment Share on other sites More sharing options...
blocky Posted June 12, 2014 Author Report Share Posted June 12, 2014 Indeed Totalshell. In-fact I have already seen that site but you can't quite see enough detail of the selector fork to tell if the one I have is damaged or not Quote Link to comment Share on other sites More sharing options...
totalshell Posted June 12, 2014 Report Share Posted June 12, 2014 (edited) both selector forks are the same so whip out the other and compare. personally i think one of the arms looks too short from my experience , getting bantam boxes together isnt straight forward but there are worse to work on. Edited June 12, 2014 by totalshell 1 Quote Link to comment Share on other sites More sharing options...
hewson Posted June 24, 2014 Report Share Posted June 24, 2014 Hi , looking at the photos , are you missing the selector fork roller's ??? ..... Quote Link to comment Share on other sites More sharing options...
martin 305 Posted June 24, 2014 Report Share Posted June 24, 2014 The cam plate rollers should hold the selector fork tight in the cam plate have you got these ? The selectors are a pair so should have the same profile . Looking at some spares I have they look pretty much the same as yours . Maybe slightly more of a round profile on mine think yours may have been filed down ?? Hope this helps Quote Link to comment Share on other sites More sharing options...
blocky Posted July 5, 2014 Author Report Share Posted July 5, 2014 Finally found a replacement. Once it was in my hand it was very obvious that mine was damaged. Next problem is the bolts that attach the cam plate assembly to the casing. Can anyone suggest anywhere I could get a replacement or have one they are willing to sell ? Quote Link to comment Share on other sites More sharing options...
deputy dawg Posted July 5, 2014 Report Share Posted July 5, 2014 Have you tried Chas field at Bantamspares.webs.com very helpfull carries new and secondhand spares don't forget locking tabs when you get bolts Quote Link to comment Share on other sites More sharing options...
blocky Posted July 5, 2014 Author Report Share Posted July 5, 2014 Just sent him off an email but he doesn't list them on his website Quote Link to comment Share on other sites More sharing options...
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