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  1. Hi, all I have a new-to-me 1992 XR250L. I got it a month ago from the PO who's had it for the last 24 years. I've been slowly working through various maintenance items and learning about the bike by taking things apart. This is my 12th street legal motorcycle since I started riding with my first Ducati in 2001 (I'm 34), and my 3rd dual sport (I've had a KLR650 in the past, and my last bike was a BMW R1150GS - I sold it last fall). I've ridden my dad's XR250R before in the Mojave (and before that, an XR650L), but my maintenance and overall knowledge of these Honda dirtbikes is pretty thin. Unfortunately, the PO (in his mid 70s) of the 250L pretty much just parked it the last few years, outside, under a porch, and let it sit without any storage prep. He pretty much rode it "a little" when he first got it, did a 305cc big bore kit and re-jetted it ("in the mid 1990s", in his words), then kept it as a second "buddy bike" for visiting friends, after he bought a KTM as his new main bike. It didn't get ridden much in the early 2000s, and even less in the last 5 years. It has a little over 2,500 original miles. Yes, two thousand, five hundred. Fast forward to the point of this post: Question #1: What the hell is a "305 big bore kit"? THAT is what the PO put in his ad (Craigslist) and what he told me in his own words. Despite being not as maintenance-anal as I am, and not really showing the poor bike a lot of "love", he was a pretty forthcoming "straight-shooter" throughout our communication and the sales process and didn't make anything up, lie to me, or try and "sell" me, so I've no real reason to doubt that it was indeed a "305" big bore that he installed, but I can't seem to find much on a kit that big (or that specific cc) on TT or the ol' Google. Is this 305 a "bored and stroked", like Baja trail Rider mentioned in post #17, here? /topic/1109455-xr250r-big-bore-opinions/?hl=%2B305cc#entry11973946 -that's really all I have to go off of. I haven't had the need nor time yet to take off the top end to measure the bore to "confirm" what I have so far just assumed to be true, so let's just assume for a moment that I have a 305 big bore kit on this 250L. The PO specifically said that the only other modifications he did was the obvious re-jet of the carb, and install a Supertrapp (on the stock 250L header). No oil cooler mod done. Nothing else. I don't know if it's worthy of noting, but I read the part # off the Supertrapp that is installed and emailed Supertrapp CS asking for what the hell it is, because the diameter of it didn't mate up well with the back end of the 250L stock header (by 3/16" +). It turns out that "P/N # 027-2853 is the part number for the muffler only. This is from a discontinued system (823-60250) for GPz 250r – 86’-93’." Um, yeah. That's aka a Kawasaki Ninja 250. Strange, right? I bought a $3 exhaust reducer from an auto parts store, some high-temp exhaust sealant, and exhaust repair tape, and sealed that bitch up. Done. But you can see that at least one thing was kind of "hodge-podged" together in this "upgrade", so I would like to think that now that I've sealed it up, that should no longer be an issue, but question # 2 is: will I benefit GREATLY from a XR250R header, or is is fine the way it is? I doubt the "welds" have been ground down. Is that worth the effort? Unbolt the header from the engine, and the welds are right there, just inside the openings? Before my next questions, know that since I've owned it, I did the pumper carb mod (a definite improvement), and also the "stick a chopped-off stainless steel bolt up in the spark plug boot" mod (also a big improvement). I've inspected the spark plug that the PO had installed some time ago, and it looks good to me (please someone chime in if you think otherwise - see photos). No soot, no oil, and a light-to-medium grey. This tells me it's running pretty optimally, but the bike does backfire quite a bit on deceleration. So it's lean, right? It's running like a champ at medium throttle and wide open, but a little "lurchy" (stumbling?) at just off idle/low speed puttering around the parking lot. When you crack the throttle back, it responds instantly, and strongly. No compression issues in my opinion, and no mid-range or WOT fueling issues, it seems to just roar to life, but of course it pops *quite a bit* once the gas is let off/on decel, and it's lurchy if you try to go 5 mph in 1st gear. The spark plug the PO had in there is a NGK DPR9Z (hotter than stock). I bought a new NGK stock plug (DPR8Z), but didn't put it in, because, well, I figure if the carb is going to be getting some more fuel (to correct what I perceive as a lean condition), via me futzing with the carb screws/jets, then for this 305 engine, the stock plug wouldn't be "hot" enough, right? Am I understanding the theory correctly? It starts right up (like 2-5 kicks, tops). I'm running 93 octane and a little bit of Sea Foam (a few ounces for the first tank or two), and it has no problem starting. Here's a video of it warmed-up, at idle: https://youtu.be/upLypksEB5E So, again: Question #1: What the hell is a "305 big bore kit"? Question # 2: Will I benefit GREATLY from a XR250R header, or is is fine the way it is? This isn't a race bike; I will commute on it once in a while on city streets, and tear it up on Forest Service roads and single track in the PNW Cascades on weekends with a buddy on a WR250R (and his bro has the same bike, too). I just want to know if the stock header is hindering my ability to find time the low-speed fueling, not if it could gain me 2 hp. Other questions: Question #3: Which spark plug is the right choice? The hotter one, or stock (or something else?) The first photo shows the one I pulled out (the hot one) vs the stock 8 new in the box. Question #4: Is there any point doing an air box mod (removing "baffle") at this point, considering that the bike is (I think) already running lean? Currently have a brand new Uni in there (with Uni filter oil), in a stock air box. Question #5: Where exactly on the carb do I "go" to adjust these "screw(s)" to fine-tune the jetting that the PO already has in there? The fueling seems really close to being ideal, to me. It's just the low-end that needs some help. I can tear the bike down in the winter and get hyper anal if I have to change jets and inspect the whole bike, but I'd like to try the easier solutions, first. I want to ride NOW! Question #6: Does removing a few discs from the Supertrapp have something to do with the popping on deceleration/off-gas? I think there were 9 or 10 discs when I bought it, and I took 2 (maybe 3) out when I was inspecting things, because it's pretty loud. I really don't care how loud it is, I was just trying to learn something. I could play with it myself, but if anyone feels like giving me the answers to the test, I'm down to listen! I think I could put them all back in and it would be "peakier" or take a few more out and get more "low end". Any tips? Would simply removing a few discs "solve" my low-speed lurching (I doubt it...)? Question #7: Is the XR400 oil cooler mod CRITICAL? On my few short rides in 75 degree weather, I've noticed zero overheating. I wouldn't ride down the length of Baja without that mod, nor sit in 5pm traffic without it (and I WANT to eventually put on an oil cooler), but if the zombie apocalypse started tomorrow, could I count on the bike to get me around, without an oil cooler, given that this has a 305cc displacement? Be honest. Question #8: what is the potential cause of my slow oil leak on the left front of the head? Question #9: Am I missing a chain guide part, here? Sorry for the LONG ASS post, but I wanted to make clear what I do know and what I don't. THANKS FOR YOU HELP!!!
  2. Jmo718

    Honda XR250L (1991)


  3. Finding a nice front disc cover for a bike with conventional forks is hard these days, so here is a good Idea, I got this acerbis spider evolution disc cover and its mount that fits CRF 2004-2008 it replaces the stock right wheel spacer and holds the cover at the same time: So this spacer is way to big for my bikes axle so I had to work it so it could fit my bike Here the disc cover and housing on place just to see how it fits Its all about your bike's right wheel spacer dimensions so they could be copied on the acerbis one. Hope it benefits you!!
  4. 0 comments

    First bike. Has enough power for most trails, but won't overwhelm a new rider at the same time. Great starter bike, and awesome bike all around!
  5. 0 comments

    Does anything, goes anywhere at "moderate" speed. Always runs perfect!
  6. 0 comments

  7. 3 reviews

    GENERAL INFORMATION Model: Honda XR 250 L Year: 2007 Category: Enduro / offroad Rating: 79.7 out of 100. ENGINE AND TRANSMISSION Displacement: 250.00 ccm (15.26 cubic inches) Engine type: In-line four, four-stroke Top speed: 140.0 km/h (87.0 mph) Compression: 9.0:1 Valves per cylinder: 4 Fuel system: Carburettor. 32 mm Keihin Fuel control: DOHC Ignition: Cdi Cooling system: Air Transmission type, final drive: Chain CHASSIS, SUSPENSION, BRAKES AND WHEELS Front suspension: Telescopic Fork Front suspension travel: 245 mm (9.6 inches) Rear suspension: Monoshock Front tyre: 90/90-21 Rear tyre: 120/80-18 Front brakes: Single disc PHYSICAL MEASURES AND CAPACITIES Dry weight: 134.0 kg (295.4 pounds) Fuel capacity: 11.00 litres (2.91 gallons) Reserve fuel capacity: 3.00 litres (0.79 gallons) Oil capacity: 1.50 litres (0.10 quarts) OTHER SPECIFICATIONS Starter: Electric Color options: Red, white, black and red/white
  8. 0 comments

    Haven't had much time on it, yet.
  9. 0 comments

    Its a nice bike to travel over all.
  10. 0 comments

    Easy to work on, fun to ride. What more can you ask for? Gearbox is perfect for a dual sport, first 3 gears are nice and low and the top 3 gears are great for cruising around town or on back roads.
  11. 0 comments

    Excellent quality, but a pretty ugly beast.
  12. 0 comments

    First motorcycle, great beginner dual sport. Mainly riding in NJ Pine Barrens, my goal is to add as many xr250r parts as I can while keeping it street legal.
  13. jg83

    Honda XR250L (1991)


    Very reliable and fun dual sport.
  14. XRMarc

    Honda XR250L (1994)


    Built like a tank and a bit too heavy. You don't see these up for sale often. Lots of fun!
  15. 5 reviews

    MOTORCYCLE TYPE Road/Trail ENGINE SPECIFICATIONS Displacement (cc): 248 Cylinders: 1 Engine Stroke: 2 Speeds: 6 TRANSMISSION SPECIFICATIONS Number of speeds: 6 Dry Weight (lbs.): 270
  16. 2 reviews

    MOTORCYCLE TYPE Road/Trail ENGINE SPECIFICATIONS Displacement (cc): 248 Cylinders: 1 Engine Stroke: 2 Speeds: 6 TRANSMISSION SPECIFICATIONS Number of speeds: 6 Dry Weight (lbs.): 270
  17. 3 reviews

    MOTORCYCLE TYPE Enduro ENGINE SPECIFICATIONS Displacement (cc): 248 Cylinders: 1 Engine Stroke: 2 Speeds: 6 TRANSMISSION SPECIFICATIONS Number of speeds: 6 Dry Weight (lbs.): 232
  18. 0 comments

    Bought it new, got taken to the cleaners but never regretted it 1 day.
  19. 0 comments

    Excellent bike! Only problem would be the carburetor if you don't make the accelerator pump mod. Really good trail and street bike!
  20. 0 comments

  21. 0 comments

    Love this thing!
  22. sm227

    Honda XR250L (2007)


    Lots of grunt
  23. 7 reviews

    MOTORCYCLE TYPE Road/Trail ENGINE SPECIFICATIONS Displacement (cc): 248 Cylinders: 1 Engine Stroke: 2 Speeds: 6 TRANSMISSION SPECIFICATIONS Number of speeds: 6 Dry Weight (lbs.): 270
  24. As some of you may know, i blew the motor on my 1995 Honda xr250L (street legal). It being my first bike, i have decided that it has much more sentimental value than i previously thought so I am searching for a replacement engine. A guy in my area has an xr200R and xr350R (unknown year) for a reasonable price. I need to know if either of these are viable options for replacing the motor. Will they fit the frame? Will i need to change the carbs/airbox as well? Will either of the new stators be able to power all the lights/signals/horn? Any other related information? I just need to know what im getting myself into before i make the purchase. As always, thanks in advance, every little bit of help is much appreciated.
  25. My buddy and I just picked up two early 90s XR250s. The 250L is running but smokes and leaks a little oil. The previous owner swapped the 250R motor into it and was unsure what is wrong with the 250L motor other than it quit on him while riding. As you can see in the pictures, we have already stripped XR250R to the frame and are planning to rebuild it and put the R motor back into it. Possibly supermoto?? Once we get the 250L motor rebuilt we are going to put it back in 250L frame and keep that one pretty stock (already stripped the metallic blue paint off the side panels). Oh yeah, they are both CA street legal and plated! Definitely want to update the 250R with newer plastics to modernize it and looking to swap the front end with something with inverted forks. Any thoughts or suggestions are appreciated and hope to keep updating with pics as we progress. Thanks!
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