Been doing a wee bit work on the Bantam and found out the following.Some of it is old information but it might help-starting with the frame:-the top tube can be lowered and the subframe mounting repositioned and the subframe narrowed/shortened.the swing arm can be extended by 1 inch(2 ways to do that extend at the slotted end(put in a fillet) or extend the tubes,if using an early (narrow) swingarm the right hand tube needs to be reshaped where the tyre/wheel runs for clearance.Front forks either standard heavyweight or fiddler type,rear shocks about 13" what you can afford(using road ones at the moment but even on there softest setting are a bit hard),Rims-front 21"xWM1 and rear 18"xWM2.Engine:- plenty can be done but its all down to the coin,with any two stroke a crank rebuid,big bore"don't laugh" the most common way to go is a Suzuki TS185 piston(standard =187cc,+2mm=198cc),the only prob is the small end is a different size(needs a bit of work),noticed that Rex Caunt does oversize pistons(big Bore).Todd head or later center plug head.Gearbox:- swapping second and third gears around makes the box close ratio,fitting a 12 tooth primary crank sprocket.Gearing 13 tooth front and 68 rear.Amal concentric with carb spacer/manifold and K and N style filter.Exhaust ,its recommended that the silencer has a volume of about 2litres and that it is close to the engine also that the exit is half the area off the inlet.Then you have various ignitions to choose from.Hope this is a help to fellow Bantam owners.
cheers the noo Brian
Brian,
Do you, or enyone else reading, have any info on making the Bantam small end work with the Suuki piston. I am about to face that problem and I see the gudgeon pins are quite different in size. I am thinking along the lines of having the Suzuki pin cut down into two short pieces that would fit over the Bantam pin, and butt up to either side of the con rod. These would be held in place on the outside with the Suzuki circlips and attached to the Bantam pin with loctite to prevent the Bantam pin from wandering into the bore.
Bantam D14 frame mods + more
in Classic Trials
Posted
Brian,
Do you, or enyone else reading, have any info on making the Bantam small end work with the Suuki piston. I am about to face that problem and I see the gudgeon pins are quite different in size. I am thinking along the lines of having the Suzuki pin cut down into two short pieces that would fit over the Bantam pin, and butt up to either side of the con rod. These would be held in place on the outside with the Suzuki circlips and attached to the Bantam pin with loctite to prevent the Bantam pin from wandering into the bore.
Any advice appreciated!
Thanks,
Andy