I found various scattered bits of info here on the forums and figured this might be a good place to consolidate info and ask questions of those who have done this. Followers 13. Need to buy that 12oclocklabs speedo calibrator. to barometric and temperature conditions? check is between 6000-8000... can i disconnect O2 sensor? I have been researching this swap for about 2 years now, it's finally a reality! Thanks. Just picked her up yesterday, 2015 CBR300r w/ 117 miles on it, run and drive. hello. OP said you've already done the swap. what i can do? By Honda has to tune for smog, very lean to make the cat work right. Although I have no experience with the EJK, I've had a lot with EFI and o2 sensors. By I don't know if I'm paranoid or not but sounds like the valves are ticking. they just make sure nothing is way out of wack but do nothing as far as giving the computer a usable input. I am soooo tempted to bring it over to the mechanics tonight but I have a big ride planned for Saturday and if something doesn't go right with the install I won't get to ride this weekend. Way to dive into a project. So I take that as a yes it does disable it. I run 14/50 and rarely use 1st gear, that gearing makes 2nd good for just about everything at lower speeds (unless your in the tight slow stuff). but i have check engine. A 305cc big bore will make more power FWIW. I feel like I'm 8 and it's Christmas morning. Hi everyone! I run 14/40 sprockets. I thought I read somewhere about needing the tip over sensor or something like that from the CBR. Copyright© ThumperTalk, Inc. - All rights reserved.ThumperTalk® is a registered trademark. Finished up some minor things, added some. Dobeck want's to tune for power, a little richer that may be a little out of. My mechanic is modifying the exhaust header for the O2 sensor for me while putting new tires on. hello. Now mind you his is an older model and bone stock but I was still expecting it to have around 25% more power on tap - it didn't. I have a 2013 CRF250L that the previous owner ran low on oil, which I did not know until I took it out for test run in prep for a week long trip and the rear wheel locked up doing 80km/hr 2x (I'm a mechanical newb). Prev; 1; 2; 3; Next; Page 2 of 3 . gnath9 gnath9 Get Help Now; Members; 14,941 posts; Location: Nebraska; My Ride ; My Ride; Posted July 25, 2017. Dobeck needs you to tune on the rich side for their liability concerns. No I haven't seen the swap into a Grom, I'll have to check that out. Recently sold the cbr but I’m itching to ride! I read about that this morning. Copyright© ThumperTalk, Inc. - All rights reserved. Nothing else changed. I had never riveted a chain before (always used clip type master links) and this sucker made pressing and riveting the master link simple. A cooler showed up in the mail today! Let us know how you like it when it is done. Discussion in 'Thumpers' started by Cuttlefish, Jan 7, 2017. But man I'm excited to start riding it, feels like a different machine. I've not made it that far but from what I've read it comes down to a new rear shock and race tech valves in the forks. He put about 7,000 miles on it before swapping in the CBR300R drivetrain last year, after which he’s put on about 3,000 miles. All USA spec CRF 250L's started with a Cat. the stock O2 sensor's range. ). In Custom, Dual-Sport, Japan by AbhiNovember 3, 2019Leave a Comment. CBR300R Engine Swap Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; Sign in to follow this . FYI The 250L was fitted with a de-tuned CBR250 engine. As its been over a year now since the mod, how are things going with the engine? 14/38 it revs less at 100 kph but softened the power delivery in the lower gears and I have now changed it back to ride with friends on enduro bikes. Hard for me to say. Maybe down the road if i get bored. 2020 KTM Duke 200, What Do You Want To Know? It ought to be quick and simple for a mechanic who actually knows what he's doing. As always, thanks for your understanding. I think I only rode it stock twice, don't really remember well enough to compare. Other than getting the engine I would need to source the throttle body and ECU for the 300r? Ride trail bike areas (enduro stuff) when with mates on Beta xtrainers and Husky 450s. New to the thread, so a quick intro- I started riding a few years ago on a grom, then got a ninja 250, then got a CBR954. Seems a little costly though, will be parting the CBR out to offset the swap cost? For now I'll do a test ride while i wait for the Castrol actevo 10w30 oil and oil filter to arrive in the mail. i swap engine cbr300r in my crf rally. The engine is hard to find as they only appear once in a while on ebay and don't include all the components for the full swap, so I decided to just get a whole bike from an auction which came out to be as much as buying the engine separately. I'll bring it to the mechanic on Monday, or maybe tonight, no I should wait till Monday. Chimera Race header for the Honda Grom 125 / MSX 125 with CBR250R or CBR300R engine swap is a full length one piece header made completely from 304 stainless steel! Quick question... Are you running a FMF head pipe with the OE muffler? So from what i've read, the following is what i'll need to complete the swap along with my personal preference oil and coolant. Availability: Out of stock Chimera Race header for the Honda Grom 125 / MSX 125 with CBR250R or CBR300R engine swap is a full length one piece header made completely from 304 stainless steel! its very good. Honda installs them for a reason just like everybody else. theres probably other minor stuff im missing. My CRF doesn't have a cat. The vendor also had the ecu, throttle body, coil and spark plug listed too. There's about 30hp in the 300 with the same modifications. check is between 6000-8000... can i  disconnect O2 sensor? Any plans to mod the engine, like cams or tuning? I'll keep the thread updated. I did some research over the last couple months on big bore kits vs engine swap and decided to finally pursue the CBR300r engine swap. 2. cbr300r BODY ASSY., THROTTLE ( GQ9JA B ) part # 16400-KYJ-902, 4. cbr300r HOSE, FUEL FEED: part # 17570-K33-D01, 5. crf250l HOSE, FUEL FEED part # 17526-KZZ-901 and RETAINER part # 17711-MGE-003 (swap this from crf250l fuel line and attach to cbr300r fuel line), 6. crf250l CABLE, STARTER MOTOR part # 32410-KZZ-900 (swap from crf250l), 7. crf250l STATOR (DENSO) part # 31120-KZZ-901 (swap from crf250l, black connector), 8. crf250l SENSOR ASSY., SPEED part # 37700-KZZ-901 (swap sensor from crf250l), 9. crf250l SUSPENSION, ENGINE CONTROL UNIT part # 38771-KZZ-900 (this is the rubber holder for the ecu, swap the one from the crf250l because of the orientation of the way it mounts). That got me a little nervous about snagging an engine off ebay. I think that our O2 sensors are narrow band - i.e. i swap engine cbr300r in my crf rally. 6th gear is taller so highway cruising between 65mph-72mph is very nice. The bike definitely feels different with the way it delivers power. As a guy with limited mechanical aptitude and with no info on it being done, I left it in the hands of a mechanic. Beyond that, it’s been well-farkled for adventure riding with DirtBagz luggage, PMR rack, BajaWorx windshield, Flatland skidplate, Acerbis 3 gallon tank, Seat Concepts low seat, FMF header, Tusk folding shifter, handguards, and much more. Definitely more linear across the board with more torque down low. Throttle cables look like they're interchangeable, I just kept my original ones, had no need to change them. I am excited for you man, can't wait to ride it when you come over.... if you'll let me. Following with interest...btw have you seen the recent YT vids were a guy fitted that engine into a Grom?

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