Montesa

Has anyone successfully replaced the drive chain tensioner bushings? Mine is a 2018 and appears to have a solid bush but the replacements (with the correct part number) arrived as a compressed split bush. They also look a little too large. When I look at them, the chance of getting them installed, round and fixed in the swingarm to work with the tensioner seems small. Has anyone done it? Does it work? It does not look good.

In the EU there's a recall on 2023 models, mine included. On some 2023 models there's an oil channel in the left cover that hasn't been drilled properly. I got notified more than a month ago. Had to do a test according to a dealer document sent by Honda Germany. Here's a short vid of the test. Both pieces of paper have to move. If not, there's an issue. After Honda saw the result, they said they were going to replace the engine which they did. I picked it up today. Excellent service that Honda is doing this. Here's my bike with the new engine which I picked up today.

A new to me 2018 4rt has a plastic guard mounted between the frame and bash plate that extends back to protect the suspension link. It seems like a good idea but also limits the torque that can be applied to the rear bash plate mounting bolts. If the bash plate is considered part of the frame, this seems like a really bad idea. I don't see it on the parts list. However, in addition to the front rubber pad above the bask plate, I see a secondary "pad" that I do not have on the parts list. Could the plastic piece I have be that secondary pad? Is the piece in the picture OEM? What came from the factory?

Warning: long message with copious amounts of techno-babble. I was reading an old discussion on this forum about whether the 4RT runs a “wasted spark” ignition (that is one spark per revolution of the crankshaft) rather than a more conventional (four stroke) one spark every 2nd revolution. It was also suggested that the fuel injection is not sequential but rather injects fuel continuously. Certainly Honda are not averse to using wasted spark ignitions - many of their multi-cylinder bikes do just that. And given the engine does NOT have a cam position sensor, both the above would be reasonable assumptions. However, I think I have managed to prove that the engi…

I'm installing the S3 E start on a 4RT. Near the end of the under fender install, a rubber boot with a number of connectors inside is supposed to get pushed down between the throttle body and frame. This is pretty much the same as the OEM setup but one connector accepts an addition to the harness so there is maybe a little more wire. The problem is that this boot with connectors looks to be twice the size of the space it is supposed to go into and I'm not getting it in place. (The estart kit adds the battery under this area so not as roomy as OEM but I didn't get a good picture of the OEM set up of this area before disassembly.) I have pulled the airbox off again but…

Since I wasn't careful enough during dismantling, I am not sure whether Cushion arm plates are in right position or I have turned it upside down. It can't be determined from the photos in the Owners Manual..

Are there any secrets to removing the chain tensioner pivot bolt on a 2018 300 4rt? So far I have tried penetrating oil, heat and a few heat cycles. Does a steel bolt thread right into an aluminium pivot?

I think it's time to see what is inside of front forks on my fresh bought 2009 Montesa, upper part is 39mm diameter black coated steel, lower is silver aluminum with NN-3-00-R/L stamped on it, but no Brand. In case that I have to replace some parts, how could I know whether it is Showa or Paioli or something else? And one more: is there any KNOW HOW to repair small dent on the upper (steel) part?

Hi everyone has anyone tried to put a montesa 125 barrel on an mh200 struggling to get a piston for the 200, 125 seems to be easier to get parts for.

I bought this Montesa 4rt in June. I've been meaning to post the work for a while. A touring motorcycle... It's rotten, completely neglected... but I got it for an indecent price. (and I have quite a few parts) There it is, disgusting at its purchase. First step washing the machine ... Iin the trash: The swingarm, the chain kit, the tires, the trim, the air box, screws, pads, rear disc, etc. I repaired the chassis, the bearings, sandblasted the triple clamps, fitted a tech aluminum fork, new braktec master cylinders, new latest generation braktec caliper and new hose. The orange wheels were in good condition but I didn't want to restor…

Good night. My 301 is the first 4-stroke trial bike I have owned. I'm somewhat lost. Once the bike warms up, the electric fan starts and is on 90 percent of the time. Even on the road going in 4 speed it stays on. When I stop and the engine is idling, the fan stops for a short time and starts again. The periods are very long and continuous. is this normal? The motorcycle has the coolant level, it does not expel it and there is no high temperature in the radiator hoses but the fan is running almost all the time.

Anybody that can share some light on this I will be most grateful. I have a 1981 Cota 349, well I think I do ( engine number 51M18349 ), I bought it as a rolling chassis and the engine in boxes. So far I have gone through the Montesa parts manual and found all the missing bits with the exception of 2 parts. Now these don't appear in the Montesa manual one usually gets online, and the difference seems to be my front sprocket is of the splined type and not the usual taper fit with a locking nut. To hold the front sprocket in place there is a sort of sprung cup and a clip which sits in a groove on the end of the output shaft. the clip on mine is broken in two pi…

My well used and abused 2006 bike is ready for full engine rebuild. Con rod, piston, cylinder, cam chain and head work. The con rod is straight from a CRF 250 and will have to be aftermarket as a genuine Honda part is only available as a full crank set ££££ The piston, cylinder etc are fairly straight forward, but I’ve never delved in to a cylinder head. I’m presuming valves will be need to be replaced and the seats re cutting and profiling which I will be getting someone else to do as I don’t have the tools to do them, whilst the head is off and stripped I thought I’d get it gas flowed. Anyone have any thoughts or experience with this? After reading the servic…

Good morning. I'm sorry if something is not understood well since you are using a translator. I wanted to ask, my 301 has come with all the electrical installation and homologation kit installed. I'm removing everything that's left over. The motorcycle comes with a lot of electrical installations and looking at the manual that was dismantled, there are two installations that I could theoretically eliminate since they are for elements of the approved version. specifically parts 28 and 29. Has anyone removed them? is it complicated? Extracting the deposit I am not able to differentiate them from the main installation.

Hi all, I have a 67 reg 4 ride which has 2600 miles on & was wondering if you guys & girls had any knowledge of adjusting the valve clearances cos it sounds like it might need a small tweak here & there. I think I’m at the sort of mileage now where it needs it . I hope the job is not too far out of my ability though ! Thanks in advance

I have a 2016 Montess Cota 300RR (MRT300G) with running issues that I have narrowed down to the fuel pump. We replaced the gas in it but due to the shape we weren't able to see very deep into the tank. So we chased our tails a little bit on other issues and eventually got frustrated and put a strap on it and pulled it through the parking lot hoping to get it to start and got it to fire a bit, which is more than what we had at this point. Now due to the foul smell of bad fuel coming from the machine we figured it just took that much to get all of the new fuel into the lines, but it still wouldn't start. Sprayed some stuff in the airbox, kicked it good and it started up. So…

Hi guys, long time no see, hope everyone is doing well. OK, what is the current situation for Cota 200C parts, still miserable? ...are kickstart gears and piston kits an issue as they used to be? Anything else I need to know? Looking to pick one up in the near future after selling my 247C and 248 a few years back. Best regards guys and thanks for your help. 😎

Hi, I’ve noticed today a green wire, which appears to have been cut !, it’s protruding out just above the radiator cover does anyone know what the wire is for please

Hi there, I am looking for a bike that will hold its value and not devalue. I’m looking at this Montesa 2004 315R. Im not fully up to date with older bikes like this but you guys will know more than me. They are wanting £2500 for the bike and there doesn’t seem to be many about and none relatively near to me. please let me know you thoughts or if you could suggest any other good Honda/Montesa bikes to invest in