Pre-65 Bikes

I have a cub engine with T20 97513, Any ideas what the year of manufacture was?

I continue to have problems with the Cub I built from all my spare parts for my Son to ride. It has a habit of leaking the contents of the Sammy Miller type top tube oil tank onto his shed floor!. The first time this happened I replaced the steel balls in the later type oil pump for a plastic ball and spring upgrade kit from UPB. But after sitting in his shed for a few months, it just did it again. I drained the remaining oil from the engine sump and got about 250 to 300 ml out. The total capacity is around 750 to 800 ml with the external oil filter and oil tank filled. I did notice the jubilee clip on the oil feed pipe to the bottom of the engine wa…

HELP PLEASE. Does anyone have a photo or photos of Peter Stirland on his 1962 works Royal Enfield 250 Crusader trials bike that they would be happy to share ? I have just acquired the engine from the bike and am looking for an image of the full machine with a view to building it up. The engine came from Mick Peeling who removed it from the bike decades ago and used the frame for another purpose. Interestingly it has a manual-advance/retard augmentation. All help appreciated.

O.k. I fitted the earlier 'R' Cam to my late engine, no problem. Replaced the primary drive chain and it now runs smooth and quiet. Made some parts to allow me to run the bike without the right hand outer cover on. This would allow me to spot any oil leaks from the gear lever shaft and outer cam bush. I also replaced the push rod tube top and bottom gaskets with new items. All is well apart from oil spewing out of the top of the push rod tube around the gasket. (see photo). I tried the thicker one when I assembled engine (without the push rods fitted) but it seemed to be holding the head off the barrel. I put a smear of sealant around the push rod …

I need a bit of help from any amc experts out there with a bike I have just bought,the story goes this machine was brought back from Zimbabwe in 2006 in large lumps in a container it was then reassembled by the owner to the state its in now. It seems to me to have the correct trials frame but has no c in the frame number,the motor is g3c 1961 and the gearbox is marked with a t and it has a wader mag fitted.The wheels and exhaust are quite clearly wrong unless this is some strange export model what do you think? Ian

I have acquired a new 'R' Cam and gear from an early Distributor Cub and want to fit it to my later Side Points Engine. I am running electronic ignition so points etc are not an issue. I am getting an earlier type outer cam bush (blind type) to match the 1/16" smaller diameter outer end of the earlier cam shaft. The gear and inner shaft fit into my engine without issue and the overall length looks the same (including the slotted distributor drive of the cam shaft) I will drill into the blind bush from the inside of the gearbox case to supply oil to the outer camshaft bearing. Is there anything else I need to do? It looks as simple as that! …

Morning all could anyone please tell me how to set up the 4 clutch springs? I know on some you tighten them all the way then back them off 4 turns but not sure about the bsa. Also should they be wired once set up? Many thanks

hoping for some input here guys, building a paul Jackson framed cub and struggling with the chain tensioner position, was hoping to get it tucked up behind the peg mount on the swing arm but the chain had clearance issues with the spring when the swingarm moved, I have tried a gasgas/universal/beta tensioners and all have issues mounting in this area, so I have now mounted one on the back of the peg mount, clearance with the chain is the best I have had it and as the swingarm moves the tensioner keeps tension. I like this position but are there any issues with doing it this way? I thought that because is it still mounted close to the pivot point of the swingarm the …

does anyone have one of these or photos of one, I have managed to get hold of a frame for a build and am looking for info around the frames? any input appreciated

does anyone know the difference between the teardrop tanks offered by armac, upb and terry weedy besides price?

Hi all, sorry may have the wrong site but you may still be able to help me. I own a 1963 triumph tiger cub SH . I am having trouble with the timing on my bike. Having gone through all relevant stuff I'm now looking at the advanced timing unit ATU. Having removed the unit I find that there is a slot in the unit that I presume locates on a peg, but looking down the shaft of the camshaft I cannot see a location peg. My question is should it have a location peg or has it broken off at some point? Any ideas anyone? Thanks anyway

Hi who’s the tigercub specialist in Yorkshire I have dealt with Martin Adams in the past . I

My sons just bought a 1934 Royal Enfield, the cost of bits is killing him well the few we can find, as he is a humble apprentice. Its missing the Mag Dyno thing, only one we have seen is £300 and its not working so as its only for shows and wont be having much road use we are thinking of using a total loss battery powered system, has any one done this? We have seen a few on line but it would be good to talk to some one who has done it, we are even contemplating building one https://www.youtube.com/watch?v=6AoSJIdhsME&t=147s He just wants the bike together and running originality can wait until he can manufacture the parts he can't find..

Hi any experience of modern carbs that would work well on a 1955 RE clipper 250 trials build.

Hi ive got a bsa bantam 4 speed and the kickstart needs replacing.Ive seen gas gas ones fitted to other bantams?Any other upgrades/suggestions?Thanks

Hello I have a nice rear wheel built on a D10 half width hub that I used to run in a C15 frame and swinging arm. I was thinking about using it in a B40 WD frame and swinging arm I have for a vintage Mx build. The spindle is obviously a little short in the B40 WD swinging arm, are there any other longer spindles that fit the Bantam hub to help with this?

i just putting my tiger crankcase together shims crankshaft I have got one shim on primery side is there spose to on other side as well been looking books cant see any shims

Hi,I'm struggling to join the GRA using their PDF, am I stupid (don't answer that), or is their a problem with their site? Thanks.

Hey guys! I picked up a Tiger Cub Trials recently and looking to mod the suspension to more better/modern-ish. For the front end I'm looking at baby cerianis as an option. Has anybody went this route fro a front end? Or would a set of 35 Betors be a smarter option. Thanks in advance! Jeff

Hi there I've been offerd a b40 bsa otter fully rebuilt for 3 k foster frame . Tiger cub hubs complete engine rebuild new carb etc is this about the going price these days