Montesa

hi.does anybody recognise these symptoms of poor low revs running on a 1997 315 montesa.the bike will always start from cold not always so reliable from hot.idles ok but runs really poor on about quarter throttle.it sounds and feels as if the choke is on but it is not.anything above these revs seems fine but the silencer runs very hot after only 2 to 3 minutes running time.the carb has been removed and cleaned as has the silencer.im not too familiar with trials bikes as this is my first one and im now out of ideas.can anybody suggest any possible cure for this very annoying problem.

I recently got a brand new 2005 Montesa 4RT. It could be around 5 Months since it leave the factory and shipped to my country Indonesia. I Just started it (following all Manual procdure)and it run at idle perfectly. The problem is, it run very poorly when the accelerator is pulled . It feels like not enough fuel, (or too much fuel ? ). The manual says that it might be the TPS (throttle position sensor) is shorted out. As you know the TPS is part of the ECU.So I cant check any wiring. Anything else shall I check ?, Vaccum line clogged ?, Injector dirty ?. I have not opened anything yet. Thanks

Hi, just bought a 99 montesa, and noticed that one of the fork seals is leaking. just wanting to know if they are hard to replace, and how much oil to put in each leg. I am mechanicaly minded but have never replaced fork seals before. p.s has anyone got a manual that i can buy? Cheers radlaty.

I know the clutch problems have been well discussed but can anyone answer the questions regarding oil type? I spoke to a 4rt '05 owner at a Wessex Centre trial last weekend and he swears that the REPSOL transmission oil is c**p and exacerbates the clutch drag and snatchyness problems. His bike is "on" the ELF stuff and after a ride round on it, there did appear a difference regarding drag. Having said that, he has also changed his gearing down so that may well be the reason for less of a snatchy & jerky take up. Ignoring the Mitani clutch and 315 master cylinder solutions, have many of you boffins changed the gearing? AND What is regarded as the most appropriate o…

Does anyone know what might have happened to any/all of the Works 315Rs, did any (or the trick parts) escape into the hands of joe public ?

Hi, i've got a 315r 2002 and have a little bit of a prob with the carb, a Dellorto standard unit. When the bike has been stood for a week and it is started on choke, it revs crazy high. If you knock the choke off immediately and rev it for a short while its gets you over the problem. If you turn the motor off for say 3 hours and start it on choke, it fast idles like it should on choke, no problems (bike maybe still slightly warm). I took the choke lever with brass piston attached out to inspect and found nothing untoward down the bore. The next day the bike then started perfectly from cold on choke and i thought the fault had dissapeared at last. However after using the …

Happy New year. I found some great clutch plates that won't cost you very much. I have had them for about a week and they are working great. The clutch has so little drag that it will stop the rear when on a center stand. I don't know how long this will last, but it is a good sign when a new clutch is installed. You can order the clutch plates from Rocky Mountain ATV and MC on line. Page 587 in their catalog. Part number T-19079 for a Honda CR 250 94-06. Here is the best part they are only 29.99 dollars and they work great. You will have to re-use your steel plates for the new one are a tad bit thicker. You can rough up your steel plates with some sand paper or forget a…

Any one got any decent pics of 315 2004 montesa?

Has anyone raised their mudguard yet on the 4RT. Want to mine for the Hurran on Sunday, but I am worried it will catch on the exhaust when the forks compress. Its never been a problem on my other bikes, but the 4rt pipe gets a lot hotter. Also I take it you run a Jitsie air filter without the fire proof cage that you put the original in. As my new Jitsie filter does not fit in it. Thanks Dave

anyone got any ideas as to where you can get elf htx740 as per the 4rt manual. could do with somewhere in west yorks, to save on postage. cos if you look on the net its like rocking horse ****.

Practicing with Dennis Sweeten and Odus Lambert today, trying to get in shape for the ssdt, so riding that type of creek section all afternoon. I was riding my Sherco 4T, Odus on a stock 4rt, Dennis on a 4rt with a re mapped ignition, really soft for the type of section and terrain we were riding. I couldn't believe the difference between Dennis's bike and Odus's bike, Odus's bike would pull hard and you had to try keep up with it, Dennis's bike was so mellow and easy to ride, even Odus thought the same thing, the bike was twice as easy to ride in that type of section. I think the programmable ignition would be the number one item on my spares list if I owned a 4rt.

I am hoping that all you experienced 4rt guys can help me overcome a starting problem, as I'm new to this 4 stroke lark. The bike is an '06 model and had no more than about 30 hours use. The bike is fantastic and always starts no problem when cold and usually 2nd or 3rd prod when warm/hot. However, I have had the odd occassion when stalling or fiving in a section that it's then been a complete pig to start. The usual "long-prod" technique fails to bring it to life and I end up having to kick it 10 - 15 times. Its knackering and frustrating, esp. compared to the 315r as this obviously fired up as regular as clockwork and got me out of the section pronto. I haven't tamp…

has anyone tried mitani clutch plates yet? if so, any improvment?

Hi all Does anyone know where i would get a spacer to replace the speedo drive, prefferably one which covers the wheel bearing face. thanks

Who has made experience with a Mitani silencer for 4 RT? Does it sound other or better than the original?

As it is almost finished, I thought that i had better post a picture or two before it gets Scratched!!

I have a 2000 Montesa 315R. The bike is great but the clutch action makes it difficult to feed power on smoothly. I was using Silkolene light gear oil but am now trying Motorex fully sinthetic gear oil. The plates look OK. Has anyone tried weaker clutch springs or even left any out? Havn't tried it but it was just a thought! Any help or advice would be much appreciated.

Hi all, do any of you good people know which size rear sprocket i can run, with a 102 link, renthal r1 chain. Currently, gearbox is standard 10 rear is 41. I don't want to go too low on the gearing, and was wondering what length chain the guys running 44t rears are using. If i can't run 44 with this size, i will settle for 42,43, as it's a brand new chain, and i don't want to buy a new one! Cheers.

Just wondering what the average price for a second hand 4rt. I might save up fro one James

Sometimes I ride my 315 around our acreage which calls for more shifting. The tiny pedal hurts and wears boots when you shift often. Any solutions other than just making a longer pedal with rubber cover?