Pre-65 Bikes

Can anyone tell me how I can get in touch with Serco or how to use modern fork tubes and yokes /modify Tri Cub Sports 1.375" fork sliders ?

Anyone got any picture's/information on the dot trial's bike's between 1950--1960. Been offered one but know nothing about them. cheer's.

After todays outing and after letting someone else try the B40, who at least knows what they are doing, it transpires that as i felt the rear shocks on the B40 need sorting. The ones fitted are "Mick Andrews Classic" ones with the black springs and either the spring rate is too heavy or the damping rate is. So do i put them on E bay and fit something else if so what? I was thinking either Betor, heard you can specify the spring rate, Rock Shocks, hear they are around again but dont know where to get them, NJB Trick Shocks , again allegedly you can specify length spring rate etc. Anybody used them on a Pre 65 B40 ? Alternatively should i try to get some lighter spri…

Assuming there is an alignment of the planets sometime in the near future and my new James frame materializes then i will need to get some wheels built so i'm gathering bits as i go along ready for if it arrives. So guys i've been offered alloy rims in both WM2 and WM3 but i dont know which to choose In the past i've never given it a thought and just used what was fitted, mostly WM2 i think, as std. I assume that WM2 being slightly narrower would give a rounder tread profile to the tyre and WM3 being slightly wider would give a more square or flatter tread profile. Would the WM3 however close the treads up and the WM2 open them slightly ? Which would give better gr…

After a second look at the Yorks classic trials website covering the Pre 65 Scottish pics (I really appreciate this photo coverage service being down under) On one pic I noticed the Big John Matchless has a modified primary cover which would indicate the shock absorber spring is removed / changes to the chain drive, the result being a slimmer / reliable good primary gearing and a neat primary drive. I have not noticed this mod previously and am interested in what constitutes the primary drive which looks like a major improvement as well as reducing engine width. Although I have never owned a trials Matchless during the classic period, I have always maintained a great…

Very sorry to say i have been forced to face facts that i may not in the coming years find time to build any further Mick Andrews James trials frames, thus i have desided to place the frame jig and all fittings up for sale and i felt that there was no better place than to advertise the kit here first. If any body is interested please contact me on the works number Bristol 01179868844. Sorry James Holland www.jhsracing.co.uk

Anybody going? Is it worth the long drive? How much is it to get in or is it free like a normal trial for spectators? Never been before but thought it might be an interesting day out and thought i might camp overnight if it was worth it. Let me know your experiences guys

Anybody seen the results from the Midland Classic Trial at Rhodesia at the weekend? Even went and bought Trials & Motocross News this week but theres nothing in there. Want me money back Not that i've got any delusions cos i know i'm crap but would be nice to know how crap So anybody seen the results?

Now i've done 2 trials on the B40 and slowly fettleing it as each outing brings up a list of things i want improveing / changing. The bikes a Faber framed, old model frame, B40 with Betor forks and OSSA type yokes. The "problem" i'm trying to get me head around at the moment is on steep downhill sections or on sheer drops it has a tendancy to "tuck under". I had a Fantic 240 Pro years ago that was the same. Now i was thinking of swaping the fork yokes for something with less offset, mine are 65mm, but at full compression on the forks there is only 12mm clearence between the front mudguard and the front downtube so not really worth it. I dont want to cut and reweld th…

working on a cub to replace the seals ( i think the forks are actually bsa perhaps from a c15) i put 150ml of 15wt oil in and they 'sag' for fun (maybe an inch and a half under the weight of the bike and another inch when lardy boy climbs on board..) to stiffen them up do i put more oil in put thicker oil in put a longer preload spacer in put 'fresher' longer springs in ..

I'm currently putting together a Villiers 32a engine to go in the James frame, when it eventually arrives , and i've got to sort out the ignition. Now i've got a PVL on the B40 and am most impressed but i dont know what is the best system to fit on the Villiers engine so was wondering if anybody had any experience of them. As usual heard different stories about the systems on offer so which is the best? I cant afford to buy a system only to find that it's not up to scratch or unreliable. Oh yes dont know if it matters but i've got an Alpha full circle crank with a std Villiers taper fitted. Havent got a flywheel yet as i thought it might depend on the type of igniti…

Query for you knowlegable people. Is there meant to be a slipper pad on the B40 duplex chain tensioner. Mine seems to run on the metal adjuster bracket !! It is also badly grooved, where the chain has been running. Is their supposed to be a pad of sorts ?

Hi. As some of you know i have started back riding again and i was looking forward to my second trial on Sunday at the Midland Classic Club event at "Rhodesia". Problem is as i am "new" at this i dont know where "Rhodesia" is so if anybody could give me directions from Derby i would be most grateful. I think it's somewhere near Worksop. Sorry to ask but i know some of the riders that go to the Midland classic events look in on here from time to time. Thanks.

Hi from Spain: I own this Pre-65 bike with a Villiers engine. Some days ago the piston blocked because it was overheated (a hot spanish day). When te engine cooled down a little it started again with no problems. Now sometimes the piston blocks for an instant. The piston looks ok, as well as the inside of the cylinder and the rings. Is there anibody that knows why and how can I stop this??? Thanks in advance.

Can anyone reccommend alloy tank supplier for these bikes. Or doea anyone have any secondhand ones for sale. ?. At a reasonable price of course Any alternative tanks that may fit perhaps ?.

Hi - I'm new to the forum and new to the pre '65 movement. Saw the demo at the Historic motor sport show and it re-awakened old urges. I've acquired an unmolested '59 Francis barnett Trials 83, which needs new tyres. I can't find a 19" trials tyre anywhere. Millers advised me to build a new wheel with an 18" rim. Is this the only way? Any help would be appreciated

Ok, the Otter/C15 is almost complete to the point where I can start riding it. One thing I need to do is replace the cheap NJB shocks that I've been using as 'place holders' for something a little better - I'm thinking a pair of Betors or similar. Does anyone have anything suitable knocking about? or can anybody offer any suggestions/advice as to where I can get something reasonably competative for a sensible price? Cheers UB

Hy from Switzerland Pre 65, although not Trial (only the rider) My father Mark had to tidy up a room to make space for his grandson. He found a pic from about 1956, showing (Scottish 6 days winner)Gordon Jackson on a 500 cc AJS at an international Motocross in Regensdorf, Switzerland, where Mark was watching. The story was, that Gordon won in the last round, because he jumped over 2 hills in the last round instead of riding through the camel bucks like everybody did (and also the former leader till last round). Don't know if its true, but sounds like a legend, nice to believe in it. However, pic is nice and probably rare. Have fun. Patrick

Help needed, I need a valve lifter assembly for a 1961 B40, bolts to rocker cover. Can anyone help with this. B**ger to start without one !!

Could any one please tell me where i could get the regulations for the ssdt. I have a 1968 b40 does any one know if it is eligible for the pre 65 trials . I know this was made after 65 but they were in production befor . Many thanks Dave