The Montesa Cota 315 R Thread...

Discussion in 'Trials' started by Garthe, Jul 19, 2009.

  1. Cliff Young

    Cliff Young Grandad

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    Hi Guys,

    I have been riding trials 3 years on a 74 TY250, including some Class A on the Sportsman line. The Ty is a great bike after I got done with it (every nut, bushing, bearing, bolt, seal, ect, including $1600.00 of motor work) but I have been drooling for a long time after a Montesa 315. After 5 months of looking, calling and hearing Oh its sold, or its in Cape Town or the last one (only on Craigs List for 2 days) Oh a guy is driving from,Oregon to pick it up. I despaired of finding one before retirement. I went to the British American Cup last Saturday intending to ride my TY and endure the BRUTAL loop on an vintage bike.

    30 seconds after arriving I discovered a club member had just got a lower hour 315 and was selling his 2001 315R Dougie Replica, and looking around I saw him just pulling into the parking lot. "Yes Mable, A tweaked TY 250 will do a tire smoking 3rd gear launch when heading to a possible dream bike purchase". " 2 minutes later I was taking a test drive, Hmmmm front rim is wobbly, loose spokes, also front wheel bearings are loose, front brake master cylinder leaks, clutch is an on off switch, sounds like a wrist pin or BAD predetonation, forks feel like a rock, same with the rear linkage, the chain tensioner is on upside down, Skid plate worn to half its normal thickness in places, its got no low end snap but compression is good. PERFECT !!!!! Shoot why buy a bike you don't get to spend money on. Anyway I reason that the time to buy one of these is when you see it.

    Guy wants $2600.00, I talk him into $2500.00 and ride off happy as a clam. I will post some pics as soon as I get it back from Lewisport, Adrian is sorting it out for me end to end. Sorry for the long post its just that the smile hasn't been off my face for a week :clap
  2. UngaWunga

    UngaWunga Mosquito bait

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    So I've been riding my 315 a little more recently, and the flaws in my setup are starting to show. Bike can't stoppie. Front brakes are squishy as hell. Can bring the lever back to the bar. First 1/2" of travel feels good, but it'll sponge back to the bar. I've bled it, and reverse bled it, and it's still mushy. The caliper doesn't feel like it's moving, neither is the brake rotor.

    Only thing I can think of is that the steel braided line has collasped, or the MC needs a rebuild. If the pads were hanging up in the caliper, I think I'd see the rotor flex to one side.

    Suggestions?

    Also, my clutch drags hot or cold. Is it supposed to do that? It looks like the braided line from the clutch MC took a hit and is flattened out a little for 2" or so. Not much, but you can see it. Other things to look at?

    Its a 2002-ish model.
  3. Sting32

    Sting32 Trials Evangelist

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    Front Brake: You try a kit in master cylinder? bike is 10-ish years old, orings are a wear item in any bike... I doubt, it is the line, but cannot rule it out of course. WOuld be hard to diagnose without fitting a known good one and trying (new one). You could have stuck pistons in caliper, where one side moves to disc, the other side doesnt move or if 4 piston, if they dont all move at same time, brakes will not bite well...

    Oil you use, can cause clutch to drag a little, IMHO, from my experience. my expereince is not on tessa's though, but buddy had sherco that he didnt get the same oil as Prev Owner, and the bike worked differently then he changed back and liked it better... you mileage will vary I guess.
  4. UngaWunga

    UngaWunga Mosquito bait

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    I figure if it was a stuck piston, the rotor would flex to one side of the other, away from the unstuck piston. I'll double check everything.
  5. BikePilot

    BikePilot Long timer

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    For the brakes, my best guess, assuming it's bled well and isn't leaking fluid, is that the MC needs a rebuild.

    On the clutch, it shouldn't drag other than when you first get going (it'll be a little stuck after sitting for a while, but should free up with a few seconds of riding). The tessa is super picky about clutch oil, use the stuff the manual calls for and nothing else. It's pricey, but it doesn't take a lot of it and it lasts quite well so the expense is really not all that much. Makes a tremendous diff in how the clutch feels, I was stunned when I swapped out for the good stuff. Prior I figured I'd need new baskets/plates to have the clutch working right, but all it took was that fancy fluid.
  6. dontlr

    dontlr Banned

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    If you can't find the pricey stuff you can try some Dextron Auto Transmission fluid. That's what was in my bike when I got it and what I continued to use and the clutch worked great in my 01. YMMV
  7. UngaWunga

    UngaWunga Mosquito bait

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    I have two bottles of the pricey stuff (ELF? Something else? I forget), and that's what I'm using in the gearbox currently.

    Next time I change it, I'll pop the cover off to look at the clutch basket fingers.
  8. Sting32

    Sting32 Trials Evangelist

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    Ive personally had this problem once. but the brakes worked relatively well still... But we deduced that the inside caliper pistons would push out on the disc so hard and outer ones weren't, and this caused the disc comes loose after a while. I ended up having to buy a new hub, for my gasgas...

    Plus what you say, it is pretty hard to see from the riding position :lol3 but sure is worth checking. it was just dirt caked in the calipers/pistons over time... I don't allow myself to "try to use all of the brake pads" anymore. when thin, I change, learned an expensive lesson, that 20-30 dollar brake pads would save.
  9. NMTrailboss

    NMTrailboss Team Dead End

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    Just a long shot, but make sure your front axle is torqued in properly and not loose. If the axle is loose the front wheel can 'walk' back and forth on the axle and the brake caliper is trying to center the wheel each time the lever is pulled and will feel mushy. Just a thought...
  10. lineaway

    lineaway Long timer

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    Never said how good are the pads? Or have you had fork seal issues?
  11. Cliff Young

    Cliff Young Grandad

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    Last month I drained the oil and went to GM Autotrak II, rode it for a few hours and drained it and refilled with GM Autotrak II, the clutch works great now, doesn't drag cold or hot. The engagement is smooth and not like a light switch. I am very happy with it now. I won on the advanced line last weekend and the clutch was great.
  12. thebrokenspoke

    thebrokenspoke n00b

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    What kind of foot pegs & mounts are they? Thanks
  13. Garthe

    Garthe ROCKS ARE YOUR FRIENDS...

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    When I get back to the house, I'll check. I bought them from Lewis Sport.
  14. Scribe

    Scribe £Bob£

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    Howdy:
    I've got a line on a '94 Montesa Cota. I believe that was the first year for the Honda power, correct? Anything I should know about this particular year? Any idea what it might be worth in decent shape? The guy is asking $1,500. Thanks!
  15. motojunky

    motojunky Professional Idiot

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    94 is a 314r. I had one a few years ago when I first got the idea of trying trials. It worked just fine. Very reliable and nice manageable power. It was a little heavy, but a fine beginner choice in my opinion. I sold it when I just had to have a new KTM200. The KTM is long gone and was replaced with another trials bike. I'm fully hooked at this point. :D I wish I'd never gotten rid of that Montesa.

    I sold mine on ADVrider - I think I advertised it at $1,350. It sold in a few hours.
  16. Scribe

    Scribe £Bob£

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    So where does one go for basic info on this bike, like how much oil goes in the tranny, chain adjustments, etc.? I can't find crap.
  17. UngaWunga

    UngaWunga Mosquito bait

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  18. motojunky

    motojunky Professional Idiot

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    I called The Tryals Shop (http://www.tryalsshop.com/) and chatted with Mike. He knew the 314 very well and was able to answer all of my questions and got me the parts I needed. I suspect much of what you find for the 315 will apply as well - or at least get you in the ballpark.
  19. GrayEagleRider

    GrayEagleRider Been here awhile

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    Anyone install a rear suspension lift kit on their 315 similar to what Lewisport carries? The website claims that it makes the suspension work better and makes it easier to bring up the front wheel.:ear

    Just curious, a 315 followed me home the other day.
  20. Brewtus

    Brewtus Buffoonery, Inc.

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    I don't know if it's ever been called a "lift kit", but I installed V-Mar's shock linkage plates on my 4RT a number of years ago and really like it. It makes the rear suspension action much more lively, and much easier to loft the front wheel. They fit the 315 also -

    http://www.vmar.com/linkage.html

    Hope this helps. :thumb