Twinshock

Hi, Can you true the rear wheel while it mount to the bike with the tire on it?

Have been asked for ignition timing for Cota 348 and can't find said info on the net, anyone know? Thanks!

Hi, anyone know the size of tapered bearings for a 1976/77 ty250 as my old cup races are getting a bit tired, cheers Dave

Just found this for sale on a French website for

I am sooooo tempted - the 125 looks perfect for my wife and the 200 ..... um ...well... I've already got one but two would be ok .... bugger eBay you mess with my mind http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=290522947209&ssPageName=STRK:MEWAX:IT

I own a 76 OSSA 250 MAR with the AMAL 627 Carb and have not been able to find any information on this Carb as most of the machines imported to Canada came with the IRZ unit. I am attempting to obtain the original stock configuration Jet sizes(Pilot, Needle Jet, Main Jet) and part numbers for various items(Needle Jet Holder, Float Needle, Float Needle Seat, Carb Gasket and O-Ring Kit)), along with the settings for the Pilot Air Screw, Throttle Stop Screw and the appropriate Clip setting on the Needle. I would if possible like to find any servicing/overhaul/parts information pertaining to this Carb in print(or digital) if available. Can anyone provide any assistance or dire…

Split the cases of my 1980 349, and was more than a little unhappy to find the gears badly corroded and not really serviceable (though they worked ok before the split) Is there any trials bike breakers in the UK? anyone know of anyone breaking a Mont? Thanks for any pointers.... Steve

The time has come for some new shocks for my Bultaco, it is a 198A sherpa, so shock length 340mm. however for a mere mortal clubman rider what do I go for, budget is £250 max. however I am confused.com There are Betors, which I have fitted currently, budget range circlips to adjust, work fine, just thought I would snaz the old girl up a bit. Betors expert range? Sammy Miller Betors again clubman and expert? NJB's not had alot of success with these, however not had a pair for about 5 years? New range of Betors available from Dave Renham at in-motion? Falcons? so open to suggestions or peoples personal preferences

Following a recommendation I'm after some 6" High Rise Alloy Trials Bars. Who sells them in the UK?? Names & no's would be good TIA

I'm helping my son in law to fettle his mid 70's Bultaco next week by all accounts it's stood in his barn for ages so first thing is change the oil,any advice on type of gearbox oil and correct quantity,many thanks H

It seems those nice people at YOU HAVE USED WORDS OR A PHRASE WHICH ARE NOT PERMITTED ON THIS WEBSITE. PLEASE DELETE YOUR POST/TOPIC. DO NOT TRY TO CIRCUMVENT THE FILTERS IN PLACE ON THIS WEBSITE have written a book on the Twinshock era. For me it has to be the best era in trials, reckon they will be on to a winner with this Click on site ad for more..

Hello all, can anybody help??? my ossa starts on 2nd kick, but will not rev at all.I have changed the float needle and needle clip as they were the wrong ones. Iv'e cleaned the jets and i have put 2 different petrol tanks on but still it will not rev. The needle is set on the middle groove, but i do not no if it is the correct needle for the carb, and cant find reference number on the part to replace it. I no the main jet is incorrect being a 120 but thought it would have run a bit better than it does. The engine sounds like it is being starved of fuel but it tickles ok. (carb is a amal 627) thanks oggy

Hello, can someone tell me, how much play/clearance/backlash between immersion tube and standpipe is permissible, or is usual (Betor-Forks). The 0.15mm feeler gage can be pushed between them well. And in another case the backlash is even so large, that the shaft seal does not fit any longer. Peter

So, the Cota has a 28mm OKO carb on it (the original carb came in a bix of bits, and has a big chunk missing out of it), and I have a couple of questions ... Where can I find a rebuild kit for it? What's a good starting position for the idle screw? Where sould I route the tube that comes out of the float bowl? I seems to get pretty full of fuel for some reason, so I'm guessing the float is stuck (?) I'd really appreciate help with this so I'm not chasing my tail unnecessarily

In my Cota 348 there's no kind of chain tensioner. However chain tensioners for 348 are available. Do I need a that one?

Are these two types of bike increadably rare? I've read the Wassell was made in Birmingham and the Dalesman in Otley but the Wassell & later model of Dalesman both had a Sach 124cc engine plus a 6 speed box and both look pretty similar if not identical from photos I've seen on the internet. Were they basically the same bike ? Over the past couple of years I been dreaming of one day coming across one for sale so if anyone could point me in the direction of one, it'd be much appreciated. thanks

Hi folks, I would like some feedback in regards to rear shocks. I have restored a couple twin shock bikes, and I ride vintage trials. But I will be honest and say, I really don't know the difference between good shocks and bad, or what they should be doing, besides holding up the seat. Or I should say, I'm not a good enough rider to tell the difference when I try different ones. What should a good pair of shocks do on a twin shock trials bike? What is the difference between a pair of rebuilt 70's shocks and a pair of $300.00 modern shocks, designed specifically for trials? I fully understand that you get what you pay for. But what am I looking for? I'm not looking for …

you know how it goes.......a friend of a friend knows this dude who has a trials bike fer sale,made out like a bandit three Tl125's for a song.....100.00 each.even managed to get one fired up tonight. My best purchase so far.

After a long lay off I've come back to trials and realised that at 40 years of age club level expert route is doable just not enjoyable for me (some sections a bit dodgy for my age!!) where I am from the expert class is a big jump up from Clubman so riding a modern bike at Clubman level isn't very challenging, I've bought a very nice Fantic 240 to ride at clubman level so trying to get it as competitive as possible, what's the best rear shocks on the market and where can I get them from?

Some time ago a topic (in this forum I think) ended up discussing the last of the real Spanish bikes (before Gas Gas & Sherco) and somebody posted some pics of the last, watercooled, monoshock, Cappra. Can anybody find it 'cause I've tried or alternatively would the person who posted said pics please repost. Thanks TFT