Twinshock

The Amal on my 1972 Cota 247 is just about worn out and I am thinking of changing it for a Mikuni. Has anyone done this mod and can give a walk through of what is required, jet sizes etc etc? Thanks!

I seem to remember that the trial is planned for the 9th and 10th of September this year. Can anybody confirm that before I book a ferry ticket? Thanks lee

Have any of you out there in the world ever used Sebac shocks on a trials bike ?!?

Just assembling the crankcases on a '74 247 Cota and before I fit the clutch just want to make sure I haven't missed something. Do the crankcase bolts have O rings underneath the washers to stop air / oil escaping past the bolts? I can't recall seeing any when I took it apart although there were traces of silicon under the washers maybe, but I can't really remember, besides, there are usually traces of silicon sealer everywhere on old engines so doesn't necessarily mean anything. I'd never have thought myself but someone has mentioned there should perhaps be O rings fitted. Or is it just bolts, nuts and washers? I have a parts book but it only gives part numbers and n…

Could anyone give me some guidance, I am about to re ring my two stroke engine,it has an iron bore and rings, most people say the bore should be de glazed but i found this article which suggests that its the worst thing you can do CLICK HERE

Ive been searching for ages for spares like mudguards and any info etc for my jcm I dont even know what model it is there is nothing on the web. Its a 240 or 250 monoshock with drums front and rear. Its currently in bits but i would like to restore it to original if possible. Id be gratefull for any help Thanks!

Hi, Need new tyres and I'm wondering if I can use a 4.10 instead of a 4.00 on the rear of my MAR 250? I do mainly country road riding and a bit of green laning, so I'm looking for a tyre to suit and the tyre I'd like to use only comes in a 4.10! Thanks Andy

Hi folks, title says it all really. I don't know if this subject's been covered before but I was wondering If any one has got a preference for either and if so why? Are they much the same or is one any better than the other? The Whitehawk doesn't seem to be as popular as the Majesty, is this just because there wasn't as many made? Thanks for any comments.

Hi guys. I wana do some mods on my ty. I am looking for dimensions and so on. I wanted to do rear shocks mod. Foot peg and possible the steering angle.. I have quiet a few stories about these but can't find actual measuments ie how far to move mounts and so on..can any one point me in the right direction?

Anyone know what the difference is between the standard handlebar and the Dougie Lampkin bend version? ....were the Lampkin bend handlebars always a dark metallic grey? thanks as always

Does any one on here know of a contact number or website/e-mail addres for Craig Mawlem, he was able to supply Majesty parts etc. Is he still trading? Thanks

Hi, i have just bought a Montesa Cota 348 1978 bike. Does anybody know the correct 2 stroke mix and any advice on synthetic or regular? I was told 25% but that seems high. This might be a daft question, it has a twin plug head, one central and one offset. Why? Am i ment to swop the ht lead over depending on what kind of riding i am doing? Thanks for any advice. Jim

The manual says to torque the cylinder nuts on a Cota 348 from 14.5 to 18 ft lbs. My torque wrench starts at 20 ft lbs. Don't really want to have to buy another torque wrench [ another $50 ] ......... what do you guys do? Calculated *guess* when tightening? The cylinder head will be torqued 22 to 25 ft lbs, so I'm OK there.......

Some very rare Merlin twinshock photos and 1 even rarer Lejeune Mono photo One of the Merlin trials photos ever - J Freixia -circa 84 - Loius Gallach behind - . I love the Garibaldi gear J Freixia - circa 1984 . Merlin DG350 Gallach replica Loius Gallach Louis Gallach The standard DG350 ridden by Loius Gallach Eddy Lejeune riding a 1987/8 DG350 mono

I have a 1974 Montesa Cota 247T and I would love to hear any suggestions this board might have for upgrades and modifications for this Cota. I have installed a new Michelin rear tube type tyre, a new Vee Rubber front tire, both with new tubes and rim strips. I have a new 9 tooth front sprocket and a 56 tooth rear with new chain. The bike runs well using the stock well worn Amal carb, along with a strange looking non stock airbox that works well. I need a new front brake cable, swing arm bushings are shot. I have set of after market weld on footpegs to replace the horrible stock 1 inch wide pegs. Should I locate them down and back?? I have heard about getting the stoc…

Hey all chasing some bar raisers where can I get them for this old girl?

Hello Gents, I have a '74 TY250 in good running condition. I am in the process of going to pre-mix with it, and therefore removing the autolube pump. I pulled the pump today, and the pump drive shaft came out with it (see attached picture). So, it seems that all I need to do now is attach a block-off plate (I've studied this procedure, and I will be fabricating one) on the case, am I correct? Or do I necessarily need to pull off the engine side case and remove other bits, such as a gear, which was suggested in a previous posting. Not sure what gear that would be, although that member (Tony 76) had a '76 TY250, which appears to be configured diffe…

Just got me a 250 mar with a whitlock ? frame , not running yet but has a spark just needs the carb cleaning i think fuel smells a bit old . Does any one know how much and what gearbox oil to use and does 50-1 synthetic sound ok ? I had one of these back in 1981 and cant wait to get it going and try a couple of twinshock trials . Any help or advice would be very welcome as i havnt got a clue about older bikes . cheers martin

Hello all, has anybody ever tried to make, or get the middle section of the mar exhaust made from aluminum???. I may no sombody who may be able to make one, and im interested in asking him to giving it a go!!. Any advise or help would be very gratefully received.

Looking for the front fender bracket(like the one the orange Gollner kt) It looks like it almost doubles as a fork brace! any replies welcome.