mcman56

Have you tried contacting the Sherco factory direct? A few years ago, I purchsed a 2001 Beta Rev3 and could not find documetation. I emailed the factory. They sent me photocoppies of the owners manual and parts list.

I keep hearing about tarrifs but have yet to see any personal impact. What do people in other countries see? When ordering from the UK, prices are less VAT with no import duties. The last time I ordered something was about a month ago. However, last year I sent a swingarm to the UK for repair. It got stuck in UK customs for several weeks. It ended up costing a total of $100 with import duties and fees to get in the country. This really surprised me. Is that normal? There were no US customs cost when it came back.

I'm in the US. Are those top hat pieces aluminium or steel? I assume the ones from the original bike were made for the smaller head pipe so would not fit but I could make new ones. If it reduced the 26 mm pipe to 18, maybe 22 mmm would be appriate for the 30 mm 300 exhaust? That would equal the same 50% reduction in area which seems quite large. I don't see the pipe avilable but it sounds like a pricy experiment. I did spend some time looking for the software and dongle to tune the engine. It was unclear if what I found would work work for this bike. If you are interested in selling the used unit, PM me. I also found this link but it looks like they just sell maps and just for max power. It does not mention hardware. https://oldskulltuning.com/montesa-cota-4rt-keihin-tuning-maps/

This is a 2018 300RR. I don't see anything like that on the parts diagram. (The power bomb pipe with O2 sensor is for the street version) I would like a softer off idle response.

Where can you find these restrictors? I have found nothing.

Has anyone tried a 260 head pipe on a 300. It looks a good bit smaller and I wonder if it would soften the response. I would like my 300 4RT to run more like a Beta 300.

It seems like you could use lighter springs with more preload to attain the same pressure when clutch is engaged. Initial force to move would be the same but would increase less with lever travel. Does the 260 use the same springs as the 300? I see the springs but not the plate. Are they still available? https://japan.webike.net/products/24020409.html?srsltid=AfmBOoqgYESkjfxhn34zme3dmDSwGPvYs9Hpdu39pFhoKpODKapkK5Nt Could this be the same. https://jbanyeres.com/product/special-clutch-springs-for-montesa-cota-4rt-and-4-ride-measuring-281mm/

Does it have the same transmission ratios as the trials engine?

I did get one and install. It does feel more lively and seems to absorb more for a more cushioned ride.

Maybe here https://ricksmotorsportelectrics.com/l/aftermarket-stators?srsltid=AfmBOooPHVWzz3Ug93MZ2_SBhLpL4CSpiGre4s0rPjAvfj3MdIMHyP4V

Why do they rub? Do the springs have a smaller inside diameter? Is the plate just slightly thicker with the groove to center the springs.

Are HP and torque numbers available for the standard Beta 300 4t, maybe with rpm numbers? I have one of those too. In a tight section, the Montesa feels much more powerful so I need to use very little throttle. I thought it was overall more powerful. However, the other day I took it to some open trails with good size hills. There it feels similar to the Beta. I wonder if there is a real power difference or if the fuel injection just makes it more responsive.

Thanks for the clarification. I was installing some spacers to reduce spring preload. I planned to pop the plates out to see if it had dimpled plates but was surprised that the plates could not just slip out. It is sort of the reverse of every other bike clutch I have ever had apart. I learned something new.

I had the clutch cover off and am struggling to understand how the clutch actuator works. Every bike I remember controls the bike from the opposite side of the engine. A rod goes through and pushes the pressure plate out to create clearance and release the clutch. On this bike, the slave cylinder pushes in the opposite direction. So, is the movable pressure plate on the back side of the clutch pack when compared to other bikes? The parts list looks like that.

How much do these links raise the bike? Does it provide a softer ride? The H&D description is hard to interpret. I'm not a trick rider but would like something more compliant so easier on an old body. The Montesa rear suspension also feels quite dead compared to my Beta 4T. "uprates the soft rear end and aids the ability to 'trick' ride and hop around the rear end by providing an even more progressive shock."