Pre-65 Bikes

I need help with a project I have bought which I was going to use for spares but after giving it a look over I think it might have a bit of history to it.My thoughts are that it has been built rather well,its frame has been modified with twin rails under the motor (the frame number is d10***)and is clearly bantam and the rest of the bike has been built with a lot of thought,does this ring any bells with anybody.Thank you.

Hello Does anyone knows where to buy the plates that are used in a pete kirby bsa clutch? I have 2 early clutches and i want to fit the newer type plates but i cant find them. I am not able to contact Pete for info. Regards Bob

Hello, Fortunately, I noticed my Mountain Cub (1965?) trials conversion bike stopped pumping oil before it got too hot. I assumed it had a bad oil pump. I found a new NOS pump for $50, so I went ahead and bought it and installed it (not a fun job). Unfortunately, my bike still isn't pumping oil. Although I'm not a triumph cub engine expert, I have rebuilt, from the crank up, three motors and they have ran great after my rebuild, so I do know my way around the motor. I was very careful to install the pump correctly and it was spotless when I installed it. Could the "dry" sump not have enough oil in it? If so, how would I add some oil? To note, I haven't pulled…

Might anyone know of a lower compression piston compatible with the B44?

Hi, did anyone take over the manufacturing of Ariel barrels , or has anyone got one they’d sell ? I believe Mick Dickinson passed away but please correct me if that’s wrong

Hello, i have a NEB clutch in my bsa trials bike and it is too sharp and agressive. i only use 4 of the 6 spring to make it softer but it is still very sharp and hard to control. I used to lubricate the plates with light gear oil before but after half a trial the clutch starts to stick and wont free complete. Now i run the clutch dry and it doest stick any more but it is very grabby. Did anyone find a trick to make this clutch work for trials ? Different plates or springs or an oil dat doesnt start to stick ? Kind regards Bob

Is the Amal Carb for Cub Mk1 626????

A friend of mine has just purchased a nice C15 for Classic Pre 65 Trials. It ticks over evenly, pulls well at the bottom end, but runs out of puff when being pushed up a hill climb . I’m sure it needs a larger main jet, but I’d like to get the whole settings right , from Amal carb type to all jets , needle and slide. Thanks everyone.

Trials compatible rear hub/sprocket assembly for standard (ie engine mountings not offset) '64 BSA C15 road going frame. Anyone got any suggestions?

Wouldd7 barrel work on b175 bottom end for super stock racer

Hello all again I'm after some advice. My B40 is running 13t gearbox sprocket and 60t rear but I feel I need a but more speed on the hills. What combination are people running for trials? Many thanks

hi there , has anyone ever weighed an alloy cub replica front or rear hub to compare it to the cast iron original type cheers

REH forks currently seem to be the preferred choice for anyone looking to build a competitive pre 65 bike. The matching yokes are listed as having an offset of 40mm, which is a bit less than the original setup on my Bamford Matchless, and by my calculations would increase the trail from approx 4 inches to around 5 1/4 inches. Any of my background reading would suggest this would be a bit excessive. There's no doubt the REH fork movement feels terific, but I'd be interested to hear from anyone who is using the REH yokes on a pre unit bike (particularly those with more traditional frame geometry) how the reduced offset has affected the handling, if at all?

REH forks currently seem to be the preferred choice for anyone looking to build a competitive pre 65 bike. The matching yokes are listed as having an offset of 40mm, which is a bit less than the original setup on my Bamford Matchless, and by my calculations would increase the trail from approx 4 inches to around 5 1/4 inches. Any of my background reading would suggest this would be a bit excessive. There's no doubt the REH fork movement feels terific, but I'd be interested to hear from anyone who is using the REH yokes on a pre unit bike (particularly those with more traditional frame geometry) how the reduced offset has affected the handling, if at all?

Hi everyone, just wondering about the bearing retainer with the peg spanner holes.....is it normal right hand thread or left hand? As the holes for the pegs is only 1/8 inch, don't want to be smacking things the wrong direction, and at the moment it not movnig in either direction. Thanks foe any advice.

Hi I am wanting to apply for v5 for my bsa b40, the frame has four numbers stamped on the headstock is that right ? Any help would be appreciated.

I’ve recently purchased a 1965 Tiger Cub. It’s been bored to 220cc. The previous owner has fitted a new Amal Premier carb 622 /301. 103 needle jet. 130 main. 19 pilot jet ( 2 rings on the jet ). slide 622 / 3.5 no numbers on the needle but two rings on the top, set at position 3 ( lowest ). The bike starts ok, ticks over fine but at a trial on Sunday it displayed all the features of fuel starvation mid section. In two sections she just stopped and wouldn’t start until I depressed the carb plunger as if starting from cold. Then fired into life. Strangely she was fine between sections, no hint of starvation. Baffled to say t…

Hi Guys, Does any one know about alloy cylinder for 500cc or 350cc to triumph 3ta or 5ta? Cheers, Mattias E.

Anyone know the ID of this frame please. I’m not 100% sure it’s a BSA frame, any ideas? Any help would be much appreciated, TIA

I'm needing to change the back tyre on my 350 Matchless. The options available are a Michelin x lite or x11, an IRC, or a Dunlop. These are all designed with modern machinery in mind, but can anyone provide any advice on which wiuld best suit a heavyweight pre-unit?