Classic Trials

OK I'm going to say it..AVGAS. Dirty word I know and I know Im doing a Clarkson and destroying the planet but a little bedtime reading of the ACU regs says its legal for competition? It's been 35 years since I ran 2 stokes and assume I can run a 75 250 on it {what mix are you using?]. Avgas 100LL is basically the old 5 star back in the 70's . Discuss Graham

Hi , what are people using for the carb to air box on the later style air box on Drayton Bantams.. Thanks

Anyone know what this is? The fact it has moulded twin shock and exhaust side panels makes me think it is not a home made job??...Honda engine and tank...but is it a Honda? Don't think so? All and any suggestions greatly appreciated.

I have acquired a 74 TL125 with a Chinese carb, and the OEM junk carb. Some research I did a long time ago said that a mid 70's XR 75 Carb was the same just jetted differently, anyone know of a better option or have one to sell?

Hi Folks, I'm an ex Midland centre ex pat living in Australia and need a bit of help with my Cub forks. At the moment they are heavy duty forks with external springs and very little suspension movement. I don't have the knowledge of what Cub owners are fitting to their bikes in UK but keep seeing the words "trick forks". I know guys are fitting all sorts of internals but I don't have the facilities to carry out these mods myself . Can anyone help with a pair of modified forks to fit standard Cub yokes and front wheel please. I'm happy to pay the market price and all expenses including postage to Australia. I prefer to be contacted on my email, twinsho…

I have an old aluminium gas tank that looks like it was not used for many years. I poured out some stinky gas, filled with fresh gas and shook it periodical for a couple of weeks to clean it out. After draining and drying, I can see sort of a layer of solidified gas lining some of the bottom. The petcock must have had a slow leak because it is covered with what looks more like dried tree sap than dried gas. Are there any solvents that will remove this? A non hazardous one would be nice but not required. I can also see that there are a couple of pin holes close together. Has anyone had luck with using epoxy to spot treat pin holes?

These are some rules for Pre65 which came out part way through this discussion after adjusting for comments so far received (will continue to adjust if more comments come in), put here so that they are easy to find. The actual start of the debate comment is below. = Pre 65 Rules = 11/9/2021 v1 The following rules are designed to enable organisers to cater for the two predominant types of motorcycle currently being entered into competitive modern Pre-65 trials events; that being original bikes and modified bikes, with the minimum of organisational overhead. Existing riders of modified bikes will see no difference in their entry. Riders of or…

Old guy but newbie to this forum. Can anyone help me locate a set of spokes/nipples for 21 inch front wheel to fit 76 TY250?

https://washingtondc.craigslist.org/mld/mcy/d/mount-airy-ossa-mar-250-bultaco-250/7381545325.html Ossa, and 2 Bultaco Alpina for sale.. I love the Ossa 😉

Hi would anyone happen to have for sale a spare subframe for a trials bike inside frame exhaust type please message details and price is so kind regards

Do people ride the early Challengers in Classic Trials? They were a light 250 bike in their time, and with a big sprocket, I was wondering how they might work with that leading link front suspension. Bars might be a bit wide, but that can be changed. Greeves may have built a better Trials bike in 1964, but the Challenger seems like it could be good... with a few changes. What do you guys think? Thanks

Hi all, Have just acquired the remnants of a b40wd. Was sold to me as a Stafford but having had those in the past I was sure the frame was different. Have found the frame number B40GB 3213 which leads me to believe it is a wd B40 issued to the UK army in 1969. The only original bits appear to be the rear wheel and the frame itself so I am thinking of creating a trials/green lane type thing. I have read a few articles on this and it seems that the wd bikes are particularly suited to this, or am i mistaken? Also, I have looked at various frame pictures online and none seem quite like mine, although it does have the bracket for the remote oil filter - any advice gr…

This trial is going ahead all being well, there seems to be some rumour circulating that it was cancelled but this is not so. There was a worry about the low number of entries but the minimum viable number was passed a while ago. See calendar on here for details and entry form

hello i'm Nicolas in France what is advantage to install a camshfat Racing on my Tiger cub trial ? the motor is much powered ? excuse but my english is so bad Thanks for your response

What year is this Bultaco Sherpa? I'm told its a 1974 but I'm not so sure. What do you think?

Evening all, My old dad has riden trials on and off all his life. He has riden bultacos the last 15 years or so.but now finds them too heavy. I personally think it may have somthing to do with lack of maintenance and the bike being a bag of bolts! Any way........I am wondering if there is an alternative for him. He is convinced a lightweight trick bsa bantam holds all the answers. I reckon a modern lil 4 stroke with electric start. Either way just wanna keep the old boy riding . Many thanks

Hi all, what’s the best oil for the gearbox on a 1988 ty 250 mono? gotta take the plates out cos the stick when not being used so will need fresh oil cheers guys

Help needed to identify Villiers engined frame ,thought it might be Cheetah but after asking some Cheetah owners we don't think it is . Main frame looks similar but swinging arm and wheel adjuster are completely different , Any help would greatly appreciated in trying to identify what it is

Hi All Putting together a 8E trialer. Have obtained a two hole head however one of the holes is oversized. I always thought the decompressor was same size as standard plug. Anyone know if this is any use for my build, or simply use the standard head. Thanks in advance

Hello, I recently acquired a 1985 Canam 320 Trial bike. I’m looking to source some parts for it. I’m in need of a stator with the flywheel, aswell as a front fender. Anyone know where I might be able to find atleast the stator so I can get it running?! It’s a Hiro Sammy Hiller engine