Montesa

Could anybody tell me what map 1 and map 2 are best suited for. I've ridden both modes on the same section and can't notice any difference. On my Beta 300 2t the map switching positions are very noticeable on how the bike performs. Also where have people repositioned this switch? I seem to constantly knock it into map 2. I think my lanyard is hitting it. I saw one mont where the map switch was neatly mounted on the radiator hose by the kickstart tip

I have read a few posts here about the 123/172/200 Cotas jumping out of gear and other mentions of a flawed design. I haven't seen any information as to why? Both my 123 and 172 jump out of 1st or 2nd gears, the 123 occasionally and the 172 worse. If it is a design issue, what is it? I have rebuilt both engines with all new bearings with no apparent wear or damage to the gears etc. They have new springs in the selector and the pawls look fine. I have tried both less tension and more tension on the detent with no change. It does seem like it needs oil in the selector pawls to work, if the bike has been sitting it won't select anything till it starts up. It …

I've noticed that my Montesa 4rt which is new to me has a slack chain. Bike is 2020 but brand-new as previous owner had it as an ornament. I noticed a slight clinking noise when oiling the chain on the paddock stand before my first ride on fri. But on closer inspection I'm wondering is my chain tensioner block upside down. The chain must be making the clinking noise when it catches the frame on the horizontal bottom tube under the swingarm pivot bolt. With the tensioner block in the opposite direction facing up it would raise the height of the chain and solve this issue. Am I right in thinking this is the wrong way round? Surely the factory hasn't fitted it upside down ? …

How does this thing pop out for cleaning? My Beta ones just popped out. These look pretty flimsy so I didn't want to force it. Do you bend it in the middle and pull from the middle and then squeeze the four little plastic tabs that are fitted through the mounting holes?

Hello. I've just bought a 2020 4rt 260. Was wondering how people route their front brake hose cable. Mine is clipped to the top of the fork slider and from then up it is not routed or clipped to anything. I'm worried the hose will snag on something i.e tree etc. It doesn't look like it simply passes through the headlight assembly like on my beta, or does it ? Does anybody have any photos how they have done theirs? There doesn't seem to be any space on the headlight to mount a hose guide. I'm sure it shouldn't be free floating as it currently is. Thanks.

Would anyone know a good spoke torque setting for front wheel on a 1999 Montesa 315?

2007 standard 4RT 250 was running fine but first, suddenly would cut out when the throttle was touched and now won't start at all. Checked the air fllter, plug, fuel feed from tank (fresh 99 fuel); the plug is wet and it has a spark; doesn't make sense that it won't run. No changes made to idle speed, always used to start on a dead throttle and throttle is fully closed. Any thoughts please? I can't find anybody local with a diagnostic tool that won't charge me about as much as the bike is worth and reading the manual on diagnostics is gobbledegook to me, I barely understand one word in three... Bring back carbs and points! Any thoughts gratefully received, cheer…

I recently posted that a friend's 4RT had a spark and a plug wet with fuel but would not run. Following advice from various sources, I; Checked that the air filter was not over-oiled and that the fuel cap was breathing correctly. Drained the tank and removed the top banjo from the injector so I could soak out that fuel with a rag, replaced the fuel with fresh 99 octane and checked the fuel was running freely from the outlet. BTW, I met a guy once who had (evventually!) found that atheft-detection transponder had come unglued inside the tank and blocked the fuel line! Replced the plug with a brand new CR6EH-9 Reassembled and kicked it repeatedly wi…

Hello all. I came by a second hand 2006 4RT earlier this summer and have been giving it some needed TLC. The latest issue to pop up is slight weeping from the seal behind the countershaft sprocket. Has anyone replaced this seal and knows if it just slips on over the shaft once the sprocket is off, or if its a major wrenching project? Hoping I can just lay it on its side and complete the task externally. I have the service manual and nothing is mentioned about the CS seal. I found the replacement part and its on order, any insight into the procedure would be very helpful.

Last on here a lot when building a 248. Now that has gone, I am looking at a MH200, year 1983. (According to the VMCC dating cert for the V5). So, one key question. It has a plastic tank under the cover. What is the current position with modern, ethanol fuel with the plastic. Do you need to use a 'special' additive in the fuel? Does the tank have to be lined? Is there an alloy fuel tank from another Montesa that fits as a replacement?

Hi anyone , i bought a new honda montesa 301RR and installed the new ower kit . the bike starts east at low revs ok but as is pull the throttle the bike is restricted in revs . Does any one can tell me why please ? and how to fix this

Hello, i'm located in Belgium and there are not to much 4RT's in the trial scene. I have a montesa 4 Ride and would like to change the cat front pipe for an original 4RT front pipe. Iff some one has one second hand in descent shape please let me know the price including shipping to Belgium. Thanks, Luc

What’s the verdict with modern synthetic oil? Is 50:1 OK?

Hi, I got good deal on new 2022 montesa cota 260RR but wondering if trial 4t bikes can stall at sudden acceleration like enduro 4t do sometimes? My ktm 500 exc-f does that sometimes with quick opening throttle resulting often in crash. Never happened to me with 2t bikes.

2021 4RT. The pointy bits (if you have one you’ll know) of the graphics are lifting. Only a tiny bit. What’s the best remedy and/or glue? Obvious option would be superglue but I don’t want residue which is impossible to remove! Any ideas much appreciated.

I've never seen parts so hard to find online as the Montesa's I must say! I can't find an All Balls kit or anything. Hoping someone here knows the bearing numbers on the 4RTs for rear and front wheels, I think I found that they are 6004-2RS but says to double check your bearings first, before I go pulling anything apart does anybody know offhand?

my 315 has an annoying crack/banging noise on full extension fork seals are good and checking the oil levels they seem fine as per the manual, oil was recently changed. The manual does mention in the right fork section a "stopper rubber" I don't see it in any of the pictures or the parts diagram, any ideas ? I also see that the left fork has a "rebound spring", this could be adding to my noises, do these generally give any bother ? I see it in the parts book but unless I am wrong its doesnt list it with a part number. before a full striping I would like parts at hand or at least located as I dont want the bike off the road for long and a…

Having a hard time getting high octane fuel. What's the best way to drop compression a bit?

Hi Guys out there, I am working on my Amal L2627, it looks like a Amal Mk2 and the gasket seems to be the same (by the looks of it) Could anyone confirm befor I order, would be great!!! Regards from Germany

So my new 4RT has come with braktec Master and slave cylinders fitted for both the front and rear brakes. I am assuming hay these are not fitted as standard to a normal out of the box 4RT? My question is relating to the free play in both levers, that is the vertical movement up and down, not the travel of the lever in normal use of the brake and clutch operation. So I would like to know if they all have so much free play? I can only describe it as wobble, it seems to be too much to me, perhaps about 25-30mm of vertical free play in each lever? I assume they have a brass bushing as the bearing inside the actual lever, but do they perhaps need spacers on…