Twinshock

I purchased this today as I fancied a twinshock mont and a bit of a project The frame and engine number is 21m51607 I've looked online and all I can tell is its a 247 no idea about how you date it If anyone could shed any light on it I'd appreciate it because I'll be needing a few bits and bobs Thanks in advance

I am rebuilding a Montesa 242 and although the bike is low hours and relatively untouched, when I washed the clutch case and gearbox out with petrol, what looks like thrust washer dropped out of the primary case, evidence as you can see, a ham head took the clutch apart, the nut was also loose, has anyone any advice on dismantling these clutches please? Many thanks 242.pdf

This might sound like a stupid question i am seeing more and more twinshock bikes with what looks like a honda or pit bike engine these bikes use the frame as a fuel tank are they hime made specials or can you buy they ,they look light a fun to ride.

Hello everyone and all. This is my first post and I'm sorry it's turned out to be a question. But I could do with a little help identifying what cc my ossa is. Now I have had a look throughout the forum for a few months now as well as the rest of the web but to no avail, so please forgive me if the info I require is on here somewhere already I've just failed to find it. It was sold as a 250 but after a quick web search I thought it to be a 310. But now after more searching and reading I'm left a little confused. This is what I know: it's a mk3 frame, with the layed down shocks. Both frame and engine have matching numbers starting with 57****, which the charts I've c…

Is there anyone out there who has an Elstar Trials or knows someone who has, pictures, sales info etc, info on these are hard to find, Don Morleys book and the "Otter" web site are the only source's i have found, any help would be greatfully received

Hi folks, does anyone know what thread is used on the top of the yoke stem, the one that holds the top yoke to the steering stem? Further to that, does anyone have such a nut, and better yet lend or sell me a die to cut this thread? Thanks in advance for any help. Dave

Hi Can anyone out there tell me how much clearance there should be between the side of the airbox and the exhaust downpipe on an early 349? Mine appears to have little to none and has started to melt the plastic? I believe the exhaust to be stock Montesa as I have compared this to my spare which is definitely original, the bracket and frame tube appear to be true, the only thing I have done when recommissioning the bike was replace the original silencer with a WES alloy type but this joins the down pipe nearer to the shock absorber mounting bracket. Likewise if anyone could tell me the clearance of the exhaust from the tank seat unit, obviously I do not …

these are photos i found on another site but as i found them useful thought id post them here, they should have about 80ml of 7.5 w oil in them. the oil level should be 65mm from the top when filled.

i have just rebuilt a pair of betor 360mm shocks and couldnt find any photos before i started so thought i would add some.

Hi I am considering changing the footpegs on my 1980 cota 349 to the more modern wider level style as I am finding myself slipping off the original angled pegs in the mud with my flat sole boots! The original pegs are mounted on a lug which is brazed onto the frame so the S3 type pegs will not fit as they need to be open ended with a wider gap to fit either side of the lug, I don't really want to modify the frame so I was hoping someone out there may have some advice? From what I have seen on this forum the later 349s and MH's with the later frame design have a different set up which allows the use of S3s or have they been modified?

Just got my bike (1985 Can-Am 240 Trials - Frame #21) and LOVE how it rides and feels! Need to adjust a few things, but that Rotax motor has plenty of low end to pull me up and over most anything. Put a few miles on the odometer at a local vintage trials event, and was smiling the entire time. New decals and touch ups and this pretty bike will look new again. Thinking about improving the pegs, and maybe new shocks one day. Already put a set of Dunlop GP tires on it, and they seem nice and grippy. I'll dream up more things to do, but for now, will just enjoy my new ride!!! Any and all Can-am/Armstrong info, suggestions are encouraged and welcome! UPDATE! Got t…

Hi After reading so much on this subject am I correct in thinking if I was to run my 1980 349 on one of the following popular full & semi Synthetics I would be ball park ok? Castrol Power 1 full synthetic at 50: 1 Castrol A747 semi synthetic (with Castor) at 40:1 My preference would be to go semi for the standing time protection it has over a full Synthetic on internals but am I reading into things to much? Anyone ran either of the above long term and would like to give the benefit of their experiences? Advice please Thanks

I was wondering what everyone was doing for rear tyres. I have been told the tube type michelin has been discontinued, is this true or not. I have a tubeless 36 spoke morad rim but am resisting using it as I would like to keep the bike looking period correct. I can get IRC tube type rears, but was concerned they might not stay on the rim, the bike is a bultaco with akront rims. Cheers Greg

Probably been asked loads of times but... Got the trials bug again after a long absence, have a 5 year old beta evo I've just started riding again but the twinshock scene is pretty decent where I live so want to get a competitive twin shock, got a budget of £2k but looks like the bikes I'm after won't come in at that budget! Was after a fantic or ty175 but both look over my budget, have seen a few ty250 for around £1500, which are about a grand cheeper than the fantics or ty175's, are the 250's that much worse?! Or shud I just stump up the extra grand? Or are there any other alternatives out there for a competetive twinshock?

Just came across this on Charlies site. Obviously the B25 is not a Pre 65 and falls into the Twinshock category unless your club has a Pre 70 class like the BMCA. This is vid number 1. there are follow ups.

Hi, I' am looking for someone that can manufacture custom made sprockets to my Panda. The bike has a Franco Morini engine, the shaft looks very similar to the one from Fantic's 125 and 200 Minarelli engine but is different in geometry. Any resources as I need just 3 sprockets with 11 teeth for a 428 chain? I have just now a used 11 teeth and a used 13 teeth which comes from a Swedish 125 Monark which had used that engine too. Left to right: - section through the front sprocket, - front sprocket 12 teeth with right shaft diameter but for 50cc Malaguti/Aspes for a Moped chain, - front sprocket 13 teeth for F. Morini with inner dimension, - front spr…

Another question to those who have ridden both.Were the SWM bikes of 1981-82 better than the last Sherpa T? Maybe just a matter of opinion,but if they were was it by a big margin? Did they handle better or have a better power delivery? I have only ever ridden one around the yard of a friends for about 5 minutes so I couldn,t really tell if it was loads better then my Sherpa T.

Having seen a bit of the Manx classic/twinshock while I've been at the Manx Grand Prix I'm interested in what basics constitute a twinshock. Other than having two shocks! What brakes, frames, engines etc are allowed, size (as in fork diameter) or age limits. Anything else that should be considered before I start to make something that's not allowed. Even more interested after seeing some of the pit bike engine specials people have made which look very similar to the first bike I ever rode in a schoolboy competition. The rules for classic and twinshocks seem to be even more liberal than those for classic racing. Which I didn't think was possible!

Recently finished building this bad boy

A time ago I was at a kawasaki dealer in the Netherlands looking at some dakar bikes he had collecting dust and noticed a kawa trial. Are there many of those around?