Yamaha WR250R Mega Thread

[OSU]

Originally Posted by skierd

I just used a positap on the ground wire then ran a new line to the negative terminal, crimped down under the terminals for my GPS and heated gear leads. Y'all are making this too complicated. Several thousand miles and all kinds of weather with it this way and no issues, tip over sensor still works fine.

im going to college for electrical engineering, its my job to make things overly complicated haha

[Sock Monkey]

Originally Posted by OSU

im going to college for electrical engineering, its my job to make things overly complicated haha

LOL.

FWIW, I was told this mod only changes the idle circuit (lower revs), and NOT the entire range. That may have been BS, but I erred on the side of caution (since I opened up the airbox and replaced the pipe) and ended up getting a FMF Power Programmer. YMMV, etc.

-SM

[OSU]

Originally Posted by Sock Monkey

LOL.

FWIW, I was told this mod only changes the idle circuit (lower revs), and NOT the entire range. That may have been BS, but I erred on the side of caution (since I opened up the airbox and replaced the pipe) and ended up getting a FMF Power Programmer. YMMV, etc.

-SM

ill be checking my plug to see if it gets really black from running too lean and I think ill put temp a gauge on the case

[cug]

Quick question: what is the largest rear sprocket I can mount on a WR250X with the OEM chain? I googled and found it for DRZ and YZ models, but not for the WR250X.

[skierd]

44, maybe 45T. Stock chain is 108L. You'll need 110L for a 46T rear.

[cug]

Thanks. Bummer. I see only 42 and 47 so far. Have to search a bit more. Not too big a deal as I'm not planning on really technical stuff, but was hoping to find a 43 to 45T that'll fit X hubs.

[skierd]

Steel sprockets ok?

Part number JTR2452.xx where XX is your tooth count for JT steel sprockets. For a 44T it would be JTR 2452.44. I'm running a 42T right now (JTR2452.42) and have used a 46 and 47 in the past.

For reference the front sprocket is a JTF1590xx. JTF1590xxSC if you want the lightweight steel version with holes drilled in it, otherwise it'll be solid.

Unsure of other brands, so far my sprockets outlast my chain as it is and they're cheap so I haven't had any incentive to switch.

[skierd]

BT-003 RS Ordered, 140/70-17 rear and I'll burn up my take off OE BT090 front for this change. Sportbike Track Gear had them for $112, about $10 better than the next nearest site.


I have a small to medium conniption every time I see or think about that luggage setup, I think I pack lighter for a month on the road... . Looks like the beverly hillbillies got themselves a motorsickle.

Originally Posted by bpg

Well, I finally replaced my rear MT43 last weekend - but not until I squeezed another 250 street miles out of it!



this was on the way to the Fuzzy Beaver Rally in western NC: http://www.advrider.com/forums/showt...719630&page=25

yeah I know, I'm too poor to afford ultralight camping gear and too lazy to compress every sock, pair o' boxers, shirt, etc. when packing - get over it!

Anyway, ended up with 3500 miles on the MT43. As you can see, it still had a lot of life left for street/commuting, and actually still gripped very well off road as long as it wasn't too wet. This was about 2X the life I was getting from aggressive DOT and non-DOT knobbies, with significantly better traction in all off road conditions other than pure mud.

After seeing what the new MT43 could do off road at the rally (uber-steep 5 minute "hill" climbs countless wet log and rock crossings, etc), quite a few folks were asking about it - might have converted a few!

[SR1]

Well, that's the danger of being 7 time zones ahead of you guys, I miss out on all the hot deals.

I'm glad someone posted a link to that 4.7gal tank ad, because gol'dang that fucker is wide. Yup, happy with the direction I plan to go, but I still appreciate all the inputs.

[SkidMarx]

Originally Posted by OSU

ill be checking my plug to see if it gets really black from running too lean and I think ill put temp a gauge on the case

That's backwards. White is lean, black is rich.
I'm sure that was just a test to see if anyone was reading your posts.

[ArmyJoe]

Originally Posted by SR1

I'm glad someone posted a link to that 4.7gal tank ad, because gol'dang that fucker is wide.

Is it any wider than the stock shrouds that it replaces?

[ironbrewer]

I use my GPS for a speedometer and odometer. Can you in fact put your WR into permanent CO diagnostic mode to have a tach all the time? Would you just permanently ground the wire? And if you did this would you have to go through the program every time you started up the bike??

[bhd1223]

Just some info regarding the BT-003 and the BT-003RS. They are 2 different tires. Very different in fact. The 003 is a straight race tire. It's not designed to work well in the wet, racers use rain tires for that. The 003RS is a "racing/street" tire. It's designed to work for people commuting on their bikes and going to trackdays. I actually ran/run the 003RS on my EX500(Ninja 500) track bike. I say used because I didn't race or do any trackdays this year due to the WR consuming my track budget. For the events and trackdays I did on the 003RS I was very impressed. No experience with rain though. They stick well until you start really pushing them to borderline expert club racing level. They slide predictably from what other have told me, I've never pushed them to that point.

YMMV.

[GotMojo?]

Originally Posted by bhd1223

Just some info regarding the BT-003 and the BT-003RS. They are 2 different tires. Very different in fact. The 003 is a straight race tire. It's not designed to work well in the wet, racers use rain tires for that. The 003RS is a "racing/street" tire. It's designed to work for people commuting on their bikes and going to trackdays. I actually ran/run the 003RS on my EX500(Ninja 500) track bike. I say used because I didn't race or do any trackdays this year due to the WR consuming my track budget. For the events and trackdays I did on the 003RS I was very impressed. No experience with rain though. They stick well until you start really pushing them to borderline expert club racing level. They slide predictably from what other have told me, I've never pushed them to that point.

YMMV.

]

Ya, I think most people (like me) in this thread are referring to their tires as the BT-003, but we actually have the racing/street version (BT-003RS). Is the racing BT003 even street legal?

[cug]

Originally Posted by skierd

Steel sprockets ok?

Part number JTR2452.xx where XX is your tooth count for JT steel sprockets. For a 44T it would be JTR 2452.44. I'm running a 42T right now (JTR2452.42) and have used a 46 and 47 in the past.

Awesome info! Many thanks, I'll find one now! Wheels are ordered, now all the other related hardware has to be decided (tires) and ordered (tubes, bands, ...). I'll use my existing rotors and whatever else I need for the time being so save some money as I need so many other things for this bike for my November trip.