Yamaha WR250R Mega Thread

Discussion in 'Thumpers' started by Sock Monkey, Apr 7, 2008.

  1. MiamiMotorcyclist

    MiamiMotorcyclist used to be -MiamiUly

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    Thanks for replying in the thread.

    If there were a wrr available around here I'd have a real tough decision to make.

    Like which bike to sell so I could have it NOW.

    I think I could live with out the low end for the overall performance, and ease of maint.
    #81
  2. Sock Monkey

    Sock Monkey Corporate slave

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    OK, here you go. I included a pic since the smaller number might be useful for some bizarre reason.....:D. The filter is really small. For those old enough to remember film cameras (you know who you are....:lol3 ), it's about the size of one of those little plastic containers that holds the roll of film.

    [​IMG]

    The filters run about $6.

    -NoVector
    #82
  3. reconsmr

    reconsmr Banned

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    NV, if your oil is that dark at 53 miles you might want to stick to a 25 mile oil change schedule!!!

    Seriously, with all due respect,,,

    WTF did you do to it??? I've done 3k street miles on a 520 RFS and the oil came out lookin more like oil than that, if the pic is giving a real quality color. Looks like alot of clutch abuse would be needed to get it that dark/burnt that quickly, I guess you allude to that with the needed adjustment. Given the tiny filter I'd be more worried about this engine than a RFS with 2 paper & 2 screens.

    My bro's 250 RFS needs a clutch pounding in A+ enduro terrain & pace, I'm guessing this bike is needing the same to really get going?

    That KTM EXC250RFS is wind limited at about 73-74 MPH, and it is a pooch, even when the jetting is spot on. It is hard to believe these are pushing 90 MPH when my +50 HP SMR 450 Husky is just getting to 100 MPH??? That 30 HP must be some special stuff???
    #83
  4. norshor1

    norshor1 Adventurer

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    my wr250r's speedometer is 6 miles per hour off @ 80 mph. according to my gps. the gps says 74mph.
    #84
  5. reconsmr

    reconsmr Banned

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    Is that your top speed too, it would line up more with my experience with that HP level and wind/air resistance. Thanks.
    #85
  6. Sock Monkey

    Sock Monkey Corporate slave

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    I did hard accel/decel in each gear, staying clear of the rev limit. I wasn't abusing the clutch to get it moving, there's no need. While the oil was darker than I expected (yep, that was the actual color), I expected relative "shine" in it from the parts mashing together, and that was present as well.

    Notice that my other current ride is a BMW GS. Those have a dry clutch. If you want them to last, you learn really quickly to go easy on the clutch, and I do. I guess time will tell if I hurt it.... :D


    Every reviewer/owner of the WRR has reported a top speed in excess of 90mph. I've not had mine up that high because I want to stay clear of max revs until it's completely broken in, but I don't have any reason to believe that all of these reports are bogus. The bike will do 65 easily in 4th gear, so I've got to think that it can add 25 mph to that with those last 2 gears and a bunch more revs.

    -NoVector
    #86
  7. reconsmr

    reconsmr Banned

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    Its hard to believe based on more powerful bikes not able to go much faster is all. Indicated 90+ is not necessarilly 90+ in real speed.

    GPS indicated on a 2008 530 EXC, JD jetted with Pirelli Scorpions was 107 in a full tuck with a tailwind, that is a 50 HP bike. My own SMR450 will just crack 100, again +50 HP and sitting mostly upright. These bikes aren't gear limited, its the HP fighting the wind resistance, 30 HP is still 30 HP, don't matter if it has a 21 speed trans, it has to overcome huge force of that resistance.

    I know this bike isn't cracking 40 HP like my KTM 250SX-F.

    Who has a GPS measured top speed?

    RPMs at 80 in 6th?
    #87
  8. nachtflug

    nachtflug infidel

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    I had mine up to 101.
    #88
  9. reconsmr

    reconsmr Banned

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    That is GPS confirmed????









    or in the back of the truck?
    #89
  10. montesa_vr

    montesa_vr Legend in his own mind

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    Kawasaki's Ninja 250 only puts out 27 hp and it just went 92 mph for Cycle World's road test. (June 2008)

    By my calculations [RPM= ((Final Gear Ratio * 168) * MPH) / Radius] the WRR would be turning 8,074 rpm at 80 in sixth, but possibly the radius of the rear tire isn't a full 13.5", in which case it would be turning slightly higher, possibly a few hundred rpm higher.

    Anyway, if you were going for a top speed run, you would probably rev it all the way to 10,000 rpm in 5th, so you'd be going approximately 88 mph before you shifted into 6th.
    #90
  11. reconsmr

    reconsmr Banned

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    Your the #s guy I was waiting for, what is the theoretical top speed at the 10k RPM limiter? I've had the lil Ninja indicate over 90 MPH but in 5th, she didn't want any part of 6th gear.

    IIRC Dirt Bike did a top speed test with a built XR650 of Johnny Cambells Baja race effort, full factory Honda race built bike and a Factory 525 EXC KTM, after pulling off fenders & schrouds and laying on the bikes in sheer clothing they only got around 108-109 mph, two bikes probably near double the crank HP of a WR250r.

    Is the 25 RWHP confirmed?
    #91
  12. Fast1

    Fast1 Twisted Throttle

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    I thought the European site was listing ~31 hp for the little WR..
    #92
  13. reconsmr

    reconsmr Banned

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    Someone posted 24.9 on the other WR thread. 31 crank???
    #93
  14. montesa_vr

    montesa_vr Legend in his own mind

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    Dynos are all different. I'd like to see Cycle World do a full test so we can get comparable weight and power numbers on this new guy. Meanwhile, here's one take:

    The YZF-R1 engine on which the WR250R is based puts out 157.1 horsepower at 12,200 rpm (Cycle World, August 2007) so theoretically in the same tune the WR250R would be capable of producing a fourth of that, or 39.3 horsepower!

    The WR250 is running less compression and has a lower redline. The exhaust is probably more restrictive. It might have altered cam timing as well. Even so, 25-30 hp is no stretch.

    Oh, and my calculations show 99 mph at 10,000 rpm in 6th gear.
    #94
  15. reconsmr

    reconsmr Banned

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    OK, assuming it'll pull it that far, 99 MPH. I ride side by side with my own SMR450 Husky, wind limited at just over 100 and a KTM EXC250RFS that only pulls 74 MPH on flat pavement, somewhere between the 2 the true top speed must lie, I'm betting closer to the KTM than the 17" wheeled SMR450 with over 50 crank HP.
    #95
  16. montesa_vr

    montesa_vr Legend in his own mind

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    Cycle World tested the SMR450 in the April 2007 issue. It put out 48.3 hp at 8,500 rpm and top speed was measured at 106 mph.

    In physics terms, 106 mph is an awful lot faster than the 95 mph people are claiming for the WR250R. Wind resistance increases with the square of the speed and all that. I see no reason to doubt that the WR250R will honestly exceed 90 mph.
    #96
  17. reconsmr

    reconsmr Banned

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    106 is probably with a pro jockey under 4-6"in plastic saran wrap, LOL. 95 is a long way off from 106 but that GPS 74 mph on the 250 RFS is a far, far away number from 95 as well, no???
    #97
  18. montesa_vr

    montesa_vr Legend in his own mind

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    74 mph for a 250 dual sport isn't much. In the Dec. 1990 250 dual sport comparison in Motorcyclist, two of the bikes (Honda NX250 and Kawasaki KLR250) had 76 mph terminal speeds in quarter-mile drag strip testing.

    According to a Nov. 1989 road test in Cycle, the KLR250 would "pull the 9500 rpm redline in sixth (90 mph)."

    No mention of top speed in Cycle's May 1988 test of the NX250, but theirs topped 78 mph at the drag strip.
    #98
  19. norshor1

    norshor1 Adventurer

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    the bike should go 90+ according to the speedo , but it will be at least 6mph off. i tried to see what it would do today but couldn't because of ditch donkeys. i hit 80 on the speedo [74 gps] but had to back off because of the donkeys.
    #99
  20. Fast1

    Fast1 Twisted Throttle

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    I'd place my bets on somewhere between 85 and 90 mph on GPS with minimal wind.

    Also check the Jap and Euro websites for manufacture posted hp..