Twinshock

UCDQ (Uncle Charlie Dumb Question) #26. This is what happens when I start treading new turf... My project Cota has an incorrect, modern-looking fork brace. Judging by the pictures I've seen, there was no fork brace on this model. Is there any benefit to having one? One of the reasons I ask is because it takes the place of fender stays, so the fender only attaches in the middle. I'm considering alloy fenders (for their superior price, durability and ease of installation, of course) and I'm curious if it's OK to just support them in the middle like this.

I was marking a board at the local mid wales trial yesterday and after seeing what must have been a million Gas Gas's come through and couple of guys on twin shocks came through...one was a Ossa with some very trick looking yokes, billet type alloy jobs, looked like the Scorpa ones...all in all a very sweet sounding and good looking bike. The next was a TL125 which again sounded very sweet, that had a very nice alloy tank sprayed blue and silver, both bikes really took my eye!. My point being now I can see why these boys must spend what must be a huge amount of money on old bikes.....there was more folk looking at these bikes than all of the rest put togethor, it was gr…

Just bought a 320 Trial Armstrong to hopefully restore, depending on the amount of work thats required. The forks need replacing or recromed, theres some problem in the gear box and not sure theres a spark and somethings a miss with the back brake plate.Its got what looks like a fantic one on there, but no slot on the swinging arm for the retaining pin, is this the wrong type off brake plate? So depending what i find in the gear box, the faults should not be two much of a problem hopefully. Other than that the bikes in not in to bad a condition. Its got a (Sammy Miller) Hiro engine and white frame with a square section . Just read the frame number but forgotten it by…

Hi As the topic says i have all i need to start the project but ive only misplaced the crankshaft! anyone have any ideas where i can get one and if i find an original where i can get piston and rod kits? ta

OK, I've dug pics out of my archives, anybody got copies of the above adverts. If you have you'll know what I'm taliking about.

hi new to trialing i have two yams and one will only run with the choke on is the carb naff or might it be something daft cheers mick forgot to say its a ty250 twinshock

I've just followed a link on this twinshock forum from Woody ( thank you Sir) and ended up looking at a photo of a lean, mean looking Armstrong 320, I know nothing... ....about this type of bike, where did they come from, where did they go, how come we're not all riding the 21st Century version? Answers about Armstrongs please post here: Answers about my ignorance please post on the back of a £10 note to my home address Wayne

Hi all, i tried to post pics of my Majesty after i finished rebuilding it, but now i have put it on ebay after only riding it once (and got second place at guisborough's glaisdale 2 day trial ).. it rode far better than expected and didnt lack in power, even though i weigh 16stone, it cost me

I looking to buy and restore a twinshock yamaha TY 175/250 Have found sites selling basic parts .But what about engine ,gearbox and clutch parts are they still available if so where ?Help please regards phil

Well i have finally for my sins aquired an Ossa MAR Mk 2 Needs a bit of work, dont they all?, so i'm asking for a bit of help and info. Parts needed. Barrel and piston as mine has a couple of broken fins and i am a bit particular about things Chrome fork tubes. Mine are pitted. See above Silencer. Does anybody make an aftermarket one? Does anything else fit? Advice. It's fitted with a dished sprocket. Need a new one. Are these available anywhere? What gearing is the best compromise? Will only be used off road as not registered. My carb Amal Mk1 is showing signs of wear so will need a new one. Should i get a Mk1 ? or a Mk2 or what. If i stay with the Mk1 car…

Hi, Cant be many of those works Kawa

Hi Anyone know much about the national twinshock champs? I've entered the red rose hosted on on the 10th, just wanted more details- is there a website? Who,s winning? Etc etc

I have just finishing rebuilding an Armstrong 320 which I would like to register for road use. I've registered new bikes with certificate of newness but this can't work like that can it? It has been registered at some time in it's life but the documents are long since lost, anyone got any advice how to go about it? Will I have to go to have it inspected by DVLA? Any advice appreciated.

Hello all! After yet another stripdown, I had the chance to have a superb practice after work on Friday on my Italjet. Although it didn't break down, and always started well, I found that if I came down a hill with the throttle shut off, when I came to apply power, there was no response for a few seconds, then it picked up. I tried small throttle openings coming down the hill, but with the less than perfect brakes, that seemed a bit too scary!!! I wonder if anyone has experienced this sort of thing before? I have had awful trouble with air leaks, but this time I made new gaskets all round, and have fitted new crank oil seals etc. My money is on the carb (Dellorto PH…

As many of you may know the engine side covers are held on with an odd sized screw (at least odd to everyone I talk to). It's an M7x1.0 in both 55 and 38mm lengths. So far I have had no luck sourcing these. Are these even available from dealers in Spain? We're almost to the point of turning down M8 sized bolts or, God forbid, tapping the holes out to M8. Help!

Hi everyone ,having a look through some old photos and found this one of two bikes , my brothers had them in the 70s the yellow one is a bsa scrambler B5O i think ,the other one i dont no much about ,think he said it had a puch engine ?Any body no anything about them,were they competitive in the day .I would ask them but one is dead and the other one i dont see much of now a days .Any info would be grateful ........CHEERS

Hi Just got a 349 montesa cota in pretty good nick, needs a few bits done so I need some advice, Havent ridden it yet but previous owner said the clutch slips a bit and it also seems to drag a bit, sometimes slips while kick starting the bike so I need to know how to adjust or fix this. fork leg is leaking also, what seals do I need and how much oil and what weight should I use? Could do with a fresh set of rings and a small end, where can these be bought? thanks in advance and heres a pic

Looking for a cheap pair of trials shocks. The cheapest I found are $115.00 from Speed and Sport. Any one found any cheaper? This is for a bike that will be for sale soon. For a keeper I'd get the Falcons.

I finished my ty resto this week, so here are all the pics of each step (or at the least the ones i took pics of). Here it is how i got it in october last year, somebody had done everything in black, it was all wrong. here it is geting striped down.... next i sent the frame to the sandblasters, all the paint striped off it, then redid the frame in two pack silver, as close as i could get it to the original colour, going off old photos next step was the engine. as anyone whos ever riden at menai will know,menai mud stains! so everything was striped down, paint stiped, etc. The engine ran fine,but after pulling it apart, we found the bore was glazed, so i h…

Can anybody recommend were to get a re-bore on a Rotax engine. Looking for a company that specialises in bike engines rather than general engineering. Preferably in Edinburgh area. Anybody got a contact no for "Skins" near Linlithgow ? Thanks Ross