Montesa

hey all, does it really helps to place a big bore kit on the 4rt? anyone tried this allready? i would like my bike to be a little bit snappier, more agressive (for the big steps) but i still want the torque and traction in low revs. regards bob

If you are like me, you find the weak links on bikes pretty quick. To me our 4rt footpeg pin set up leaves some room for improvement. If your in the USA or Canada and want to setup your bike like this contact me and I'll help you out. These are aircraft grade AN bolts and there is no threads where there shouldn't be, like under the hanger or footpeg. See pics for what I'm talking about. This is a 300rr with CSP hangers but the bolts are available in any size pretty much.

Did anyone tried an upgraded injector in a montesa? Banyeras is selling en injector that should be better, does this just replace the stock injector or does the bike needs remapping to get the best out of it ? Kind regards Bob

I am thinking of doing a few upgrades to my 315 montesa. I've heard of a different barrel and head being put on. Boysen rad valve being put in, flat side carb, has anybody done any such upgrades to their monts and was it worth it / how much did it cost. I've put the jitsie shock plates on, different clutch plates. I don't want to throw money at it as its always only going to be an old 315, but I don't ride often now and have got money left over from selling my 4RT. Any suggestions?

Hi all, I noticed that Lewisport USA sell a new head for the Mont which ups the comp. ration..........I wonder what benefit? http://www.lewisportusa.com/parts_motor.htm Also, I'm ready to try AKTIVE reeds on my '99 Mont.......does anyone know who sells them in the UK? Cheers, Ian.

lad at work had a blat on my 315r today, reckons he's had years playing on crossers so of he goes and then cracks the throttle wide in 2nd and loops the bike within 10 feet of me thing is it landed upside down and stayed there revving its nuts off for maybe 5 seconds before i righted it and shut the jammed throttle. it re-started straight away and doesnt seem to be rattling/or knocking. i ran it this evening up to temp and had a run up the road and all seems ok but do i need to worry bout anything else?

Urban trials bike. What about adapting a current bike or similar for 'urban' use. Where noise is almost always the worst problem. The idea is the bike is a proper trials model, but it has to have a lot more sound proofing. Bigger silencers, thicker exhausts, cases etc. Ok its heavier but would it be possible to reduce the sound levels considerably in some way. Still suitable to be road registered. It would still be comparatively light but would be expected to run in a different 'class' perhaps. Might be handy in Japan and the UK at least. Another bike varient for the manufacturers to make as well based on the same technology. Ideal for my garden!

Hi. I'm looking to expand my 4rt fuel tank as much as possible as I have to ride long distances to get to decent riding spots and I enjoy a bit of trail riding too. I know there is a 4rt long ride seat which holds an extra 2 litres but the beta seat holds an extra 4 litres and if I combine that with a hebo fork tank then my fuel problem is sorted! However I don't know if the beta seat would be atall compatible. Could I make it fit...somehow? Thanks for any help ?

Heard everyone raving about these linkage kits, but as a bit of a noob, I was just wondering if someone could please tell me exactly where they fit and the pros and cons of them? TIA

Do any of you have experience with the V-MAR rear shock linkage for the 4RT? The linkage lifts the rear of the bike and they claim: "This gives you improved 'hop' without sacrificing the excellent rear end traction." If you've tried the linkage, did it work as claimed? Please share your thoughts/experiences with this mod. Thanks

New member here, and this is the first post on my recently purchased 2001 315r. Sorry to start my forum participation with a novel, but I thought I'd better provide all the information I can about my mysterious problem. The bike is hard to start, and when it does tick over with the choke on, the revs go sky high. I have to hold the choke in a half-on position while the motor warms up to keep it from either screaming or dying (is this normal?). Once warm, the idle hangs after revving and warbles (1-2 oscillations per second) when it finally drops, which it does very gradually over about 5-10 seconds. However, to keep it running, I have to set the idle rather high; oth…

Been looking at this topic and have started wondering if this has anything to do with my bike stalling.I have got to thinking that my bike has got harder to kick over than when it was new.It is about ten months old and i have nether checked the valves,does anyone think this could be a problem with the valves.Although the bike is hard to kick over it start first kick usually.

I am digging into my bikes first valve adjustment and have a question that those of you who have done it before may be able to answer. Firstly, everything is relatively straight forward, and relatively easy to access. The question comes from trying to find TDC. When I align the T with the hole in the cases the rockers do not move freely, if I rotate it another 360 degrees I still cannot move them. I have tried to slide a feeler gauge in at both positions assuming one of them is TDC, but it is really tight. Is it possible that my valves are so tight that I cannot get a feeler gauge in an TDC? Other than being able to freely move the rocker arms can I verify that I am at TD…

Is it a easy job to check them or best done at dealers

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

hi all,am currently riding a mint condition 06 beta 270 and want to go 4stroke some time soon and was woundering realy what sort of valve my bike wud bring and what sort of valve i could get a 05 montesa 4rt for????any help would be good thanks

Hi guys. I have a 4rt 280cc repsol. I started hearing a slight noise on the head recently so decided to have a look. Can't see anything wrong. Does anyone have any tips on valve settings? I have the manual but would like more opinions before I start fiddling with tappits. Many thanks

can you just tape up the vent holes in the seat or are they requires for air intake? - i have fine mesh on them but it just gets clogged up with muck, figured i'd be just as well blocking them off and protecting the intake from crud a bit

Hey guys, do people mod the fuel vent lines for cosmetic reasons or is there a reason to do it? How about the crankcase vent? I'm guessing oil into the air filter isn't a desirable thing to have happen. So do you just plug one side with a filter and cap off the airbox side? Jon

Hello All Just managed to get my hands on a very early Cota. (frame and engine number under 1200!) I'm thrilled to have a 'bike resto in the shed for the first time in about 15 years (last was an old Norton) I'll be honest with a Cota this early, I think that it should be accurately restored rather than put together as a competitive machine. This means alloy guards etc. thanks Jerry