Classic Trials

Does anyone have any info on frames made for Bantams by Paul? Munslow

OK, it’s obviously Grimeca, but what did it come from and where can I get pads and seals? It came off my well-used Beta TR35, at least that’s what I think it is after a lot of research. But I can’t find any reference to a 4 piston caliper/mount combo like this on *any* Beta parts list from the 88 to 92 era, at least. It fits my (steel) swingarm like it was made for it. The pistons measure 25 and 22m. Everything is in good shape except for the dust seals, which have completely disintegrated. Short term I can reassemble w/o them, but I’d much having them there, obviously. thanks for any pointers, Sam

Recently I purchased a beater ty250 and I am looking for a seat. They appear to be unavailable so I guess I am going to have to have one made. Have any of you done this? Any recommendations as to who can make it? I do have the fiberglass base but no seat. I have made my own seat pans in the past but I would rater not reinvent the wheel if there is a supplier out there. I am located in the US. Thanks

Recently acquired a 1963 Cub converted to a TR20 replica complete with 3TA forks. I am a relatively light rider (65kg) and find the suspension very hard and also noisy with the rebound 'slam'. I am toying with the idea of fitting progressive springs (and possibly rebound springs) ?? The legs have casting numbers H1119 and H1120 (possibly suggests sidecar origins ??) with what I believe are a red/white marked 464mm long springs. The units themselves feel smooth and tight so I'm disinclined to dismantle them further. Any experience, advice or suggestions for suitable solutions would be very much appreciated.

hi will a ossa gripper 350 cylinder liner work in a ossa mar 350 cylinder .

I have most of a 1968 B44. The main thing I don't have is an engine, and these engines seem hard to find. Would a Triumph unit twin fit into that frame without too much trouble?

Hello guys, last year I've got a 1973 Explorer with a semi-seized engine. Managed to find another one that should be in working conditions but the owner doesn't know which model it's from. I tried putting the engine in, it looks the same when it comes to frame brackets but it doesn't fit... it's like it's slightly thicker than the stock one where the engine meets the frame in the swingarm/filter area. Also noticed the right side sprocket cover is different (longer)... any idea? Is it better to slightly file the engine bracket or the frame?

Hi all I’m new to this forum and am in need of some help , I’m looking for a pair of wheel rims for a ty80 or even complete wheels , I’m am restoring a 1976 model , have been told I can possibly get alloy but that’s not the way I want to go with it as I want it original , any help would be appreciated as all avenues I seem to go down are a dead end 🤨

Hi All, Starting a project on an ‘89 Aire. I don’t have the forks to go with it so looking at my options (budget friendly). I’ve never tinkered with or even ridden a motorbike so don’t have any knowledge to go off. What are my options of forks/wheels? I assume getting something period correct will be my best option for getting something that will fit? Is it just a case of making sure the forks fit with the 35mm yokes that I have? Or if I get a full set with different yokes is it just headtube dimensions to check? I.e if theres upside down forks that I can find. I’m not overly fussed about making it factory corrects just looking to get it usable so don’…

Hi, I’m looking to buy a Cub. Please let me know if anyone has one they’re looking to sell. Thanks

Hi im recommissioning a1980 Beamish. The techomoto throttle has quite some wear and I would like to replace. Are the new Domino throttles a decent replacement? thanks Kev

I want to have my front forks rebuilt. They are 35mm Betor. Can anyone give me the details of someone who can carry out the restoration? Thanks. Stephen

Hi, I have a Cotton Starmaker trials bike and need to have the wheels rebuilt. Can anyone advise me as to what sort of rims I should fit - S/S , Alloy or chrome ? Also should I fit chrome or s/s spokes? Thank you.

Hello, I could do with a bit of help if anyone can assist please My trials Cub, has a PVL electronic rotor connected to an Electrex world cdi coil pack, unfortunately the chap who built it is no longer with us, so there is no way I can verify this. The two instructions from each manufacturer state different ignition settings BTDC My question is: Which setting would be best to set the static timing, the Electrex world at 6.5mm BTDC or PVL 1.8-2.2mm BTDC? I am led to believe that the PVL has little or no advance till 7000 rpm, but the Electrex world has the advance built into the coil pack Can anyone positively confirm or deny the above Any fur…

Hi, I have just fitted a Mikuni 26mm carb to my Cota 349. I was originally jetted for a TY200. It will start, eventually, and tick over, initial revs are not good then clears in the mid range to full throttle. Does anyone know the jets and needles etc that should fitted? I did find an old thread but was settings for a 348. Would the same be ok for 349? Many thanks

Can anyone tell me the fuel 2 stroke ratio recommended for this bike and also how much gear oil it takes. Thanks.

Hi, final had time over Christmas to spend time with the Cota. Everything including carb and motor have been stripped and replaced with new parts. However, there seems to be no fuel getting through. Good spark and compression, but not the slightest glint of it starting. Any ideas?

What oil do riders of Bultaco Sherpa use with oil filled swingarm chain oiler fitted to early 70's Sherpas....

Hi I have an old '72 XL250 that I'm thinking of building into a trials bike, similar to the Jefferies bike. Any thoughts on how the head angle was steepened? Im favouring heat bending the top tube but I'm open to suggestions. Thanks in advance Mart

I'm old (81+) with a new acquisition of a 1977 Canadian market TY175. I'm way past stand-up motorcycling leg strength, and, so, seeing this bike advertised for a song, I remembered back in the day, Cycle World in the States reviewing the then new TY175 and remarking that it was the best "trail" bike they'd tested. I bought it, thinking it was so light and maneuverable, that it would suit the woods and logging road riding available here on Vancouver Island. I found right away that the foot pegs are too high and far back for my wretched legs to be comfortable in my preferred sitting style, so I acquired foot peg brackets and rear brake pedal from a 1975 DT175. This moved…