Montesa

I have seen a used engine for sale, can anyone help me identify it, the engine number is 51M7529.

Hello, I'm in the middle of restoring my 348 and I'm trying to fit a Wes silencer but it doesn't line up the the centre box, the bike came without a silencer but has an alloy plate fitted on the frame mount? Anyone seen this before?

Your opinions guys on what gear to use to ride clubman level trials in wonderfully wet Yorkshire. its a new bike after ten years off. i finished riding a 4rt ten years ago so I'm not a total stranger to the machine. i remember all those years ago not getting to grips with what gear I should be in, first or second. last week I was on a training course and the instructor who rides a 4rt very very well said 2nd gear ALWAYS!! With plenty of clutch if necessary. second gear on the stock sprockets seems very fast in the sections. i will not change the sprockets under any circumstances, I'm a tight Yorkshire man!! just want your opinions guys o…

Hi is it possible to replace the small fuel tank of the Montesa Cota 301RR (2022) with the larger tank of the 4Ride ?? are the mount points identical? cheers, Manu

I'm sure this has been asked 100 times but I'm looking to find out the year of a montesa I'm looking to buy. Guy says it's 03 or 04 but it has a carbon tank and frame decals which I think are 1998/1999 , I have pictures of the bike and a frame number if anyone could help me out? Second question is once I've found out the year What's a fair price to pay for it? Thanks in advance.

Can folks give some input on the value of a 1973 montesa cota 247 trials bike? Looking at parting with my father's bike which is not currenlty running and we need a ballpark idea of what to list it for. Thank you in advance.

There's 'Cota' printed several place on my '16 260. What does that it stand for, is it an acronym, or someone's name? Yes, I've tried searching, and google translate, but granted I may have overlooked something quite apparent.

Been fitting my swing arm protectors. I had to take the side stand off to fit my swing arm protectors. I thought this would have been a ten minute job. The drive side was just two bolts but the side stand side was a nightmare. Unless I was being totally stupid it appears you have to undo the side stand pivot bolt to create space to get a socket on the two m8 bolts that hold the stand to the swingarm. I don't have a spring puller so had to refit springs first then lever side stand back into position and get pivot bolt through. I spent a whole hour trying to line up this pivot bolt as I couldn't get it to thread into the threaded section of the side stand. It went straight …

Can anyone offer advice on a QUICK and EASY way of throttle cable replacement? Did one a while ago which I seem to remember needed me to remove throttle assembly and all sorts of other bits. Surely there's an easier way? Cheers

I have an old Cota 123. YEARS ago I bought parts from a guy in Vancouver Canada. He had a lot of old Montesa parts. I can't find his contact info now. Can anyone tell me who he might be and contact info?

Suspect I know the answer to this already, but any new news for 2024? I’d like to replace my 2022 standard 260 but hope there are some tweaks (even if better colours/graphics than the standard 2023 4RT…).

Hi guys I have a 2015 Repsol 4RT that has been amazing to ride and I regularly change the engine oil/ transmission oil. On the last change there was barely any transmission oil at all! I have done some searching on the forum and this has been mentioned before - with the crank seal apparently the culprit? Has anyone experienced the same and did this change solve the problem? I'm looking to have this changed, and not experienced opening up the engine so would doubt its a job for me - can anyone recommend a good shop local to Birmingham/West Midlands who'd have experience with Montesas? (BVM?) I was quoted by a Montesa dealer in Yorkshire but don't want a lon…

So a 17 plate 4Ride with 230 miles only dont ask its one of 4 bikes i use for green laneing and it gets an easy life I have had it from new. So last year did the MOT only time the bike went out bike started no problem did an hour play then put it away ready for use. so i then fall ill and cant ride for the entire year so pull it out this year as I'm back and fight fit the bloody thing wont start did the reset thing loads of times fuel smells ok spark ok and looks to be wet it will fire with a blast of carb cleaner in the plug hole when put back in where do I go from hear. body work off and get at the injector or is there a quick trick as problem looks to be fuel

Hi, I am struggling to find new piston rings for my 248. I have measured them to be 68.5mm but inmotion trials haven’t got them and I can’t find anything on google. any help on where to get them would be appreciated. thanks

Greetings all, So a couple of months ago I bought my first trials bike (exciting! ), a Montesa 311, spent much of the first two months just getting a feel for it- much different to the 4T's I'm used to! Anyway, about a month ago I noticed the fan wasn't spinning- yup typical story, fan burnt out, you know the drill. Checked off all of these- Fan- burnt out, new one on the way Thermostat- all good Wiring- Fine, current comes through However- on advice from a friend, I tested the regulator first to make sure I wasn't going to bugger up a new fan as well- and discovered its overvolting. I tested a 12 volt computer fan (definitely worked before, on a 12v car battery),…

Has anyone changed sprocket size on their 4ride? Currently i have 10/41 (which i think is stock) Bike doesn't relly get used for "trials" riding, more for really technical trail and woods riding. I think i can sacrifice a touch of slow speed, to make the ride between sections a little more pleasant. I was thinking of changing to 11/41, but not really sure how big a real world effect 1 tooth at the front is. Also, i'd like a steel rear sprocket, but evertyhting i see for sale is aimed at 4RT and therefore weight is key and they are all aluminium.

Just bought a 2008 4rt repsol and would like a service manual has anyone any idea were to get one .I have a SY250T but want to try a 4T, last montesa I had was a 349 outfit many many years ago. Any help would be appreciated.

Hi ive a 315 fully rebuilt in every way and now fitting the rear wheel it seems to become very hard to turn once the spindle nut is tightened. snail cams are in equal positions and the rear wheel seems to be in alignment. I’ve had the wheels rebuilt the swing arm powder coated new spindle bearings and a second hand rebuilt calliper new snail cams chain sprocket disc finally botls . any ideas? cheers!

Was riding last weekend without any issues then in the afternoon bike refused to start hadnt dropped the bike or hit anything hard bike ran fine all morning fresh fuel did the throttle reset still nothing so went home got home to clean bike & it started but the died after a couple of minutes so new plug no luck plugs not exactly wet but smells of fuel so hoping not fuel related does this sound right? no spark so will check all connectors for anything obvious however cant for the life of me remove the 2 bolts on the fuel injector to allow me to remove the tank do I definitely need to remove the injector first? will remo…

Asking for a friend who's looking for a more affordable gear oil for his montesa 4RT , elf is $140 a litre here in Nova Scotia. Many thanks for any replies