The Montesa Cota 4RT Thread

Discussion in 'Trials' started by Johnnyboxer, Apr 2, 2010.

  1. jonnyc21

    jonnyc21 Trials Ninja

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    I have considered checking into having a case created that would allow a change of the filter without taking the whole cover off using something like an O-ring on a threaded cap... but I admit it just doesn't seem worth it in the long run unless the demand for one to the degree to have a large batch of them created was present.

    The time and engineering to get it correct would make it to costly otherwise.
  2. Champe

    Champe Been here awhile

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    Have you seen anything in the filter during the 3 years ?
    I suspect that changing the filter every 15 hours is overkill. Especially since it is not simple. I am changing oil every 15 hours but let the filters go for 30.
    BucketHead likes this.
  3. jonnyc21

    jonnyc21 Trials Ninja

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    Not sure about anyone else, however I did see a few small particulates when I changed my first filter on my 2017 300RR. Nothing sense...

    FYI: I also do 15 hr oil changes with 30 hr on the filter for my 07 4RT.
  4. Beavis353

    Beavis353 Adventurer

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    Yes, but 3 years has been 3 different bikes. I pull the stock filter out after about the first 30 hours and put in my stainless. There is always a small amount of material caught during break-in on my machines. For my 2015 I still pulled the filter with every other oil change similar to you; zero debris was ever found. With my 2016 and 2017 bikes I pull the stock filter after about 30 hours and then I leave the stainless in there all year. I take it back out just before selling and have never seen a trace of anything. I clean the stainless filter on a paper towel to inspect for contaminates, let it dry, and put it in a ziplock for the next bike.

    Long story short I keep super fresh oil in the bike and really don't worry about the filter much.
  5. Paul7

    Paul7 Been here awhile

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    Somewhere back there, there's a discussion about lower/farther back foot pegs on the then new 2017 260 the 2018 300RR to quote Honda has "Peg position 5mm lower/rearward compared to the 4RT260". So time to get your order in for whoever wanted them.:-)
  6. Paul7

    Paul7 Been here awhile

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  7. jonnyc21

    jonnyc21 Trials Ninja

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    Thanks for the link.

    After reviewing it and finding the 2017 specifications I see a "Optional HRC FI tuning kit" is listed for both. And am now thinking I might try to get one.

    Guessing it's the same as all past programmable 4RT throttle body's... but would hate to get something that doesn't work. Anyone know for sure?
  8. laser17

    laser17 Long timer

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    A buddy of mine just traded his almost new 2016 300rr. He wasn't riding it and fell in love with a skinny little Vertigo. In reality, the 300 was too much bike for him - the 260 would have been a better starter bike. I figured I'd give a heads up to folks on here but will delete the thread if this violates the site policies. My friend bought the bike new and took very good care of it and never beat on it.- He is very anal about his bikes - frequent oil changes ect... (He has several other Honda's so he just bought the best honda trials bike he could when he got into Trials - not to mention the sexy looks of the rr. ) Stu will ship in the continental USA via fedex freight for cheap. See here for details: http://www.jackscycles.com/used.html - Price is listed at $7995
    [​IMG]
  9. 2whlrcr

    2whlrcr gooligan

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    So a Vertigo is a better beginner's bike...
    laser17 and 10K like this.
  10. heffergm

    heffergm Long timer

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    Relative to a 300rr, yes... but only barely.
    jonnyc21 likes this.
  11. laser17

    laser17 Long timer

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    He bought a 250 V. (He would probably be better on a 200 like most novices)

    He also has the European street kit for it - I think he was prob going to ebay it.
  12. trials935

    trials935 Adventurer

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    Anyone know what year the 4rt first came with fat bar mounts on the triple clamp, and are the clamps angled back or vertical, and were they silver or black like the 300rr. Did any version fit the 39mm Showa forks. Want to put fat bars on my '06, don't really want the v mar.
  13. SportSawyer

    SportSawyer 4RT Herder

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    1) First came out on the 2006 Repsol model, P.N. 53131-REP-SOL for top triple clamp, 53230-REP-SOL for handlebar clamps. No longer available.
    2) Angled back, same as standard.
    3) Silver like standard. Clear anodized and shot-peened finish.
    4) All fit 39mm Showa and Tech 39mm forks. All 4RTs had Showa forks until the 2014 ED & 3ED (standard) models. 4RT260 Repsols still have Showa forks.
    5) V-Mar might be your best option at this point. If you want clear anodized, you could contact them and see if they can do one. V-Mar sells either straight-up or angled-back handlebar clamps to fit the their top triple clamp. S3 also makes a top clamp for 2005-2008 4RTs, and a different one for 2009 and newer. There was a change in the steering stem, top nut, and fitting thickness of top clamp in 2009. So 2009 and newer OEM fat bar top clamps may not fit the older stem properly.
    Grooster and laser17 like this.
  14. trials935

    trials935 Adventurer

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    Thanks Sport, you are a fountain of knowledge!
  15. SportSawyer

    SportSawyer 4RT Herder

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  16. jonnyc21

    jonnyc21 Trials Ninja

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    Will be interesting to see if they start brining it into Honda dealerships in the US or if it only is in Europe. I would be very interested to know if it works as well as the ELF.
  17. JZigan

    JZigan Adventurer

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    Just thought I would share what I did for a spark arrestor for riding the UTE Cup this year.
    The older 4RTs had a unique exhaust exit collar with two bolts on a stubby snout. So this is
    what I came up with. You can find them on ebay etc. Run about $20. I removed the stock
    collar to install this, so I suspect the pressure delta is about the same.
    upload_2017-11-8_21-56-0.png

    The part is made by Nelson, and the number on the screen:
    N.M. 49022 , US Patent No 4872528
    http://www.nelsonglobalproducts.com/all-spark-arrestors/
    And yes they are US Forestry approved.
    Either the US Forest service didn’t bother to check this year as I think they had a record wet
    season or they just trust the RMTA since they did check.

    Whittled out an aluminum adapter from hex stock laying around the shop.
    upload_2017-11-8_22-3-35.png

    Pop riveted screen to the adapter and RTV for sealing and used the stock
    bolts to mount to the bike.
    This is what it looks after the 80 miles of the UTE Cup trials.
    upload_2017-11-8_21-57-14.png

    You can see a little ash on flat part of the screen but looking in the end view it was still clear. I couldn’t
    tell any difference in performance. But then again the parking lot was at 11k feet and it went up
    from there.
    upload_2017-11-8_21-57-35.png
  18. lineaway

    lineaway Long timer

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    We have been using those on the 4RT for years. Certain John Deere dealers sell them for 25 bucks.
    Brewtus and Boom Boom like this.
  19. nwcycle

    nwcycle Long timer

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    anyone have a clue what a set of 300RR ( 17 ) wheel assy go for?
  20. 2whlrcr

    2whlrcr gooligan

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    I'm clueless.