XR650L tranny swap 2nd, 5th gear Group Buy

Discussion in 'Thumpers' started by beechum1, Jan 4, 2011.

  1. D0T-C0M

    D0T-C0M Adventurer

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    I have a digital vapor dash that shows RPM, I am running 15T/49T gearing right now. I can give you RPM readings if you want. What speeds do you want RPM for? I am not interested in putting the 45T rear but I don't mind giving you RPM for the gearing I am running. I have a 14T front sprocket due in on Monday so I will be running that next week.

    As far as the consensus on the 5th gear being too large on stock gearing I would completely agree. Its my opinion that the original 5th gear and stock gearing is good for people that run the pavement most of the time. Putting a 5th gear with one tooth less equals to driving the stock 5th gear with a 42T rear sprocket which lowers the RPM too much IMO. The 15T/49T I run is great for pavement riding but out in the trail I think the 14T/49T will be bang on, although running the 49T already has helped 1st to 4th quite a bit.
  2. D0T-C0M

    D0T-C0M Adventurer

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    I just went out for a spin and at 100km/hr or 62mph the engine is turning 4300RPM with NX650's 5th gear and running 15T/49T sprockets.
  3. gottyours

    gottyours smog sucks

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    what is the gap from 4th to 5th like. with the bigger tire its a big gap. my plan is to run 15/48 in the thought that 5th would be close to stock gearing. im looking to lower my first 4 gears while still being able to ride up to 70 or so on the hwy.


    steve...... if he motor had a few more ponys like yours it might work. i am building a second motor that will have the new 5th gear in it and i believe that the built motor will be able to pull the lower rpms at freeway speeds.. what size is your back tire and gearing now?
  4. tjrockit

    tjrockit One day closer...

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    Hmm... If that is the case, then maybe I'll focus on installing the XR600 1st gear and the NX650 2nd gear since what I really want to the gearing for off road in first and second that I get from running a 14/48T sprocket but still want the highway speeds for traveling back and forth to the trail head.
  5. D0T-C0M

    D0T-C0M Adventurer

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    Well I think switching to 14T/49T help all gears from 1st to 4th and by putting the NX650 5th it will make your machine driveable on the highway.

    The gap between 4th and 5th is more pronounced but still quite smooth. I think the 14T/49T is going to be bang on. I will report back my findings.
  6. flatfender

    flatfender Been here awhile

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    If your bike will pull 15/42 gearing then the answer is no, 15/45 is not too tall with the NX 5th gear. I met a guy that had an '06, 100% stock XR-L with 15/42 gearing, he loved it, its only duty was as a commuter during rush hour traffic. He also claimed it consistently got 50 mpg.
  7. flatfender

    flatfender Been here awhile

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    If you want the first and second gearing to be the same as running 14/48 sprockets then adding the 600R first gear would be a step in the wrong direction. The 600R first gear is not as low as the XR-L first gear. 2.38 versus 2.66 for the XR-L.

    Have you considered buying one of Cigar Mikes center stands and changing the front sprocket at the trail head? Having a center stand has put my lift out of business.
  8. tjrockit

    tjrockit One day closer...

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    Glad you brought that up. I was assuming like the NX650 2nd gear that one tooth less would be the right move.

    I haven't considered a center stand as I've been trying to reduce the over weight of the bike anyway but it is an option to think about.
  9. D0T-C0M

    D0T-C0M Adventurer

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    Ok I have put my 14T sprocket this morning and went out for a spin and I think its perfect now but will test further this weekend. With 14T/49T at 100km/hr - 62mph the engine RPM is now about 4500RPM. The engine breathes much better. Low end is far better. Top end is fine at highway speeds. I would say for those wanting a beast in the woods or if your a heavy set guy like myself (260lbs.) this would be perfect gearing. If your a lighter rider or riding faster than let's say 65mph on a regular basis than maybe the 15T/49T would be better suited for you, otherwise I think the 14T/49T is by far the best gearing for all purpose driving.
  10. gottyours

    gottyours smog sucks

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    So the shop I bought mine from says he can get more! It is a special order and took me three weeks or so to get. Let me know and I can post his email if you'd like.
  11. thebigman

    thebigman bout a dollar 3.98

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    Well hell yea , :lol3

    and Thanks, :deal
  12. beechum1

    beechum1 Dandole Gas al Burro

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    Fo sho, and OTD price if you don't mind.
  13. gottyours

    gottyours smog sucks

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    Ok so the web site is www.LewisportUSA.com . My price was $204.71 plus local sales tax making the total $221.60. Of couse there would be extra shipping I'm guessing to get it to you. It's not the speediest way but he can get them and anything else euro you may need. Have fun......
  14. Bell driver

    Bell driver Been here awhile

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  15. flatfender

    flatfender Been here awhile

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    interesting the SLR650 came with 14/43 sprockets, basically equal to 15/46.
  16. D0T-C0M

    D0T-C0M Adventurer

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    Which in my opinion is a step in the right direction. I'm loving my 14T/49T setup more and more.
  17. tjrockit

    tjrockit One day closer...

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    I heard back from my friend in Japan and she may have the 5th gear for me. She'll be back in the states in 3 weeks and she'll give it to me then. I guess her contact got the gear right before everything got wiped out.
  18. beechum1

    beechum1 Dandole Gas al Burro

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    Oh, wow. Good. Does that mean then, no soup for us?
  19. tjrockit

    tjrockit One day closer...

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    Sorry, there was so much devastation, I was shocked that I was even hearing from her... :dunno
  20. Ghost_Mutant

    Ghost_Mutant looking for bionics

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    Do you have an estimate on how much the gear costs in Japan? That info would tell us if it's worth pursuing getting this gear from somewhere beside Europe.