Pre-65 Bikes

Hi, I'm building a bantam. I have knackered old C15 forks, and thinking of swopping for some off an early Jap trail bike, MZ, or TY175. But how do people switch over to a knock-through spindle. I don't have access to a lathe, or friend with a lathe. In addition to the above, are there any forks that are an easy fit (I'm also keen to avoid too much re-work in terms of the length of the steering head which seems quite short on a Bantam). TonyP.

Can anyone suggest someone who could supply me with a bolt that I need in order to complete a Bantam engine rebuild. The bolt I need is one of two that attach the gear selector quadrant to the engine case for a 4 speed engine.

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 ?

I See some billet yokes for the cub have a 1.5° offset between the fork tubes and spindle, which way does this offset go? (Front wheel towards the down tube, or further away) And what’s the reason, to tighten up the steering angle or to help the front wheel clear the frame?

Trying to find a folding gear lever for a Triumph 500 unit twin. Anyone know a supplier Needed to fit my TRIBSA

Hi there , ive just bought these forks for my Cub , they are 30mm diameter sliders the yokes have a big offset and have the tapered top Does any one know what they were off and how old are they suitable for the pre 65 scottish ?

Dear all, Im just interested if any of you know how people maintained their small ends in the period pre roller cage bearings and for that matter, today at 4-t, eg ultra thin BMW. Press in the new bush in place, Ive done, fine drill by adjustable reaming tool 0.01-3mm, Ive done. Maybe Ive done it wrong.... Think Ive read when order new small end bush for eg Pre-65 2-t, "you need to fine drill inner diameter by reaming tool once bush fitted to the con rod" .... Regarding a thin mtr bush 1.5mm eg like BMW, a very skilled man, 55y of expericence, claim that nothing but dismantling con rod from crank will do, -to be able to fine drill a small end bush in cod rod in a "mil…

Dear all, Any idea where to search for allenkey head screws 5/16" 22TPI? Do not have to order these from the US, do I???? Are 99% sure of the threads, anyhow- similar to the fine threaded end of Bantam cylinder studs cheers,

I’ve just acquired a nice set of 32mm yokes for my BSA project, I’m now after a pair of forks to suit Anyone know what bikes had 32mm good forks fitted?

Does anybody have any experience with these bikes? I have an opportunity to pick on up and would love any opinions. I would not use for trials but rather as a round town bike to run errands on. Cheers Jon

Hi all, anyone know where I can get any magnesium engines case covers for a C15, I very seen a few on bikes and just wondered if I could get my hands on any? Thanks

Hi again Chaps , anyone know if grey Stilmotor mudguards are available ...Cheers

Anyone have a link to a supplier of a decent 18 inch rear rim for a Bantam to be used with a widened hub . Also if you have built the wheels what spokes do you recommend ?? Thanks

Hi all , who sells rear number plates for trials bike ???? , oval mudguard type .....Cheers Chaps

Who is the Gentleman in this you tube -

My 199 Cub is fitted with the R cam, it always has had this cam so I have no comparison but at a trial today I rode a 199cc Cub with similar engine set up to my bike but with the std Cub camshaft. Now I realise that bike set up is subjective and it could have been the 'new broom' thing but the std cam seemed to provide as much power at the bottom end but possibly a more controllable and steadier pick up. The R cam really makes the motor go once off tick over but having ridden the alternative set up I now am thinking might this be the way to go? In most trials you simply do not require loads of power, a smooth engine seems better so what cam is most widely used in the li…

Is anyone here using a Wes exhaust on a Bantam, have you a picture of it? Does the silencer sit at an angle sloping downwards ??

Dear all, Do need some advice here, where to search for proper black full lenght, ~180dg, polymer compound 5" mudguards similar to all OEM, Acerbis, UFO... mesaurements and shapes identical to 5" alloys = accurate diameter for 18 x 4.00 for "periodic 50´ rigid look:-) Were naive enough assumed no one offering rear 5" full lenght with smaller radius than required for 18 x 4.00.... should match what?? 17 x 3.75 is it even possible to find for OEM Cota 125?? And China compound not at all corresponding to all trials / motocross panels, tanks, mudguards..Ive ever seen from -75 up to date. M G.. Cheers,

Hi Guys , just trying to get my James Captain trials registered (road altered bike), frame letters very hard to make out , i can just about make the numbers out , but what do the frame numbers - letters start with , i'm filling in the Vintage Motor cycle form in .....Cheers

Can anyone help please, I have an Amal concentric carb, looks like a Mk 1.5 concentric with the choke lever, the body has a cast number 625 with L1 stamped to the left of it and number 1 below the 6. Can't work out from the Amal website exactly which type it is 1600 or 1900 to order spares. Any advice gratefully received