Street/track 250

RideCBR.com Forums Member Build Threads Street/track 250

This topic contains 21 replies, has 9 voices, and was last updated by Profile photo of borderline4laska borderline4laska 2 years, 3 months ago.

Viewing 22 posts - 1 through 22 (of 22 total)
  • Author
    Posts
  • #61287
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    Well after taking my 250 to the track a few weeks ago I have decided to make the bike more track worthy. While riding I noticed the front brakes are kinda needing a bit more bite to them, I already have steel braided line, but the brakes are still lacking. Also the front shocks just drop out on hard turning, the bike did hold the line fairly well, but hit a bump in the track and she goes all over the place. The rear shock is okay if you weight 160 lbs, however I do now weigh that. So a new rear shock will have to go in place of the stock one. Myself and a friend who is a track safety inspector also a Kawi 250 rider have set down looked all over the internet and decided what we fill will be the best for the CBR to be more track worthy. I will share the links of what I have already purchased for my 250. I am 6’2″ and tip the scales at 230 lbs. While my 250 will be getting an upgrade I have decided to get myself in a little better shape also, as the power from the 250 is also lacking so I will help it out by losing some weight.

    Front brake conversion kit. 16MM master cylinder with a Brembo 4 piston caliper. I will get the sintered brake pads for it here locally.

    TSR : Front Brake Conversion Kit [06450-M41-0BK]

    All Balls Racing Fork Bushing Kit. Since your rebuilding the front forks may as well get all new parts for it

    Honda CBR250R 11-13 All Balls Racing Fork Bushing Kit from SportbikeTrackGear.com


    Honda CBR 250R 11-13 All Balls Racing Fork and Dust Seal Kit from SportbikeTrackGear.com

    .95 springs from Sonic Springs
    SonicSprings.com

    Initial adjusters


    SP TAKEGAWA : Initial Adjuster [06-06-0007]

    Rear shock will be an Ohlins, re-springed for my weight

    https://www.pureperformancecycles.com/Brand/Honda/Honda-CBR250R/Performance/Ohlins-HO122-Rear-Shock-Absorber–11–13-CBR250R/

    15 tooth front sprocket will get locally. All parts that have been ordered were what will work for me as for price and shipping. I live in the Philippines so parts and availability could be cheaper for you in America. I will update the results once everything is here and installed on the bike. Total for parts and shipping came out to around $1200.00 the above mentioned guy that help me locate everything has done this to his Kawi 250 and the bike feels, rides, and handles amazing. I am sure I will get the same results for my 250 also. Thanks for looking through my thread.

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #62576
    Profile photo of jnsracing
    jnsracing
    Registered Member
    RideCBR Guru
    Points: 12,570

    Good work with your picks – your brakes should be well sorted now, with brand new fluid as well, and a proper bleeding.

    On the suspension, you hit it on the head with getting stiffer springs, and .95 kg/mm will be perfect for you, even if 230 is without riding gear.

    You’ll barely recognize the ride of the bike, once you get this stuff mounted, and you’ll improve your lap times exponentially, just from being able to run deeper and brake harder, and even more so with not having a “wallowy” suspension, which usually forces you wide, and ruins your turns.

    Good luck with it all, and keep us posted on the work! :socool:

    (((http://ridecbr.com/forums/topic/my-f2-builds/))) (((https://www.facebook.com/JNSRacing72)))

    #62613
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    Sorry for not updating been having to pay for my own internet so I havent been posting much, have a lot to upload with many pix. After ordering the Front brake conversion kit from Webikejapan, I got an email they are out of stock will be restocked Dec 3rd, emailed them Dec 4th the reply they are no longer making and have stopped selling the conversion kit….. FAK ME!!!! Now with that news the mechanic says just get the sinter pads and squeeze the lever harder. Will try that for now, if needed be ill get a 16 X 18mm master cylinder later.

    First the Bog bore kit. 305cc

    Port and Polish

    Test fit of bore kit

    getting squishy, had to mill the cylinder down to get higher compression ratio

    Racing cams installed

    After motor work was completed and mechanic satisfied he moved on to the clutch. Plates and clutches were all within spec so no need to change them.

    When clutch was buttoned up he moved on to the custom header pipe

    Since the local dyno was down until February it was decided to get an Auto tuner to go along with the Power Commander V from Jett Tuning…. Insert bung here

    While waiting on the rear shock from Ohlins he got to work on the front. Didn’t get any pics of disassemble or reassembly. Looks like a BIG BIKE now :D

    After 1 month the rear shock finally made it took longer as they had to order the stiffer spring from Ohlins. Sucks being a big guy sometimes. along with the PCV and the Auto tuner

    Currently the mechanic is hooking up the PCV and auto tuner, he is hoping to have it ready to run late tonight or early tomorrow morning. He is more excited about it then me I think. Well he gets to ride it first, tune it and set it all up before I get home. Wont be home until January. Spent my Bday, and will spend wife’s Bday, Xmas and New Years in Abu Dhabi…. Lucky me. Thanks for looking. More updates to come.

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #62615
    Profile photo of cbr-f2
    cbr-f2
    Registered Member
    RideCBR Guru
    Points: 25,415

    :wow:

    #62686
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    Mechanic is all but done, after breaking in the engine and running the autotuner he found it was over fueling between 3000 – 4500 RPM. Thats all taken care of now. He says the bike pulls really hard now from idle to 11,500 RPM. I have been trying to get Jett Tuning to give me the un lock code for the rev limiter to bump it up to 12,500 RPM, but so far havent had any luck. He got all the little extras put on today. Slider & spools from T-Rex, fender eliminator from Yoshimura, and all the fairings back on. He is taking it to one of the tracks close by to home this coming weekend, and then he will take it to the local twisties road and dial in both maps. He mounted a switch on the bars to make it easy to swap between the 2 maps. The track map will be for of course the track and in town riding, the 2nd map will be for the higher altitudes for riding the twisties. Once I get home I get to start shedding the weight off the 250.

    Ohlins rear shock installed, re-sprung for my weight

    PCV and Auto Tuner installed

    T-rex spools and slider installed along with fender eliminator

    I should be home hopefully around mid January, cant wait to see how much different she will ride.

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #62701
    Profile photo of theredrocket
    theredrocket
    Registered Member
    RideCBR Guru
    Points: 33,444

    Love your 250. That things gonna rip it up, not to mention looks amazing with the mods and color accents. Hope you can locate your front brake mod. Would be nice to have duel rotor/caliper set up. I found it humorous about his response to just squeeze the lever harder. Hope you have fun riding around!

    #62710
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    @TheRedRocket said:
    Love your 250. That things gonna rip it up, not to mention looks amazing with the mods and color accents. Hope you can locate your front brake mod. Would be nice to have duel rotor/caliper set up. I found it humorous about his response to just squeeze the lever harder. Hope you have fun riding around!

    @theredrocket

    Thanks for the comments. I would love to have dual front brakes, however that would mean getting the forks off of an older CBR400RR, locating bearings that would fit the triple tree from the 400 to my 250, then rebuilding the shocks, calipers, new braided brake lines etc. He is going to get the sintered brake pads, and try them first. He did tell me that he has a 4 piston Nissin caliper from a CBR600 at his shop thats been sitting around for a while, if needed he can get adapters made to fit the caliper on my 250, also have located a 16 X 18 Brembo master cylinder on fleebay. I hope we dont need to go that route, but if I need to then I will.

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #62719
    Profile photo of conrice
    conrice
    Registered Member
    RideCBR Newbie
    Points: 654

    Proper mods there. I’m sure the fact that its a thumper kept the cost of the engine build down. And the welding on that exhaust is gorgeous.

    I can’t see close up, but just how polished are those intake ports?

    And how much adjustability do the 250’s forks have?

    How much does the bike weigh?

    #62720
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    @conrice

    I haven’t paid the mechanic yet for any of the work he has done, once the bike is finished and all set up we will settle up on the bill. When my little brother dropped off the bike for me I gave him 10,000 pesos ($225.00 USD) roughly. for any parts, oil or little item he might need. I live in the Philippines by the way. Originally from West Texas.

    The mechanic barely touched the intake ports, whats shown in the pix is the exhaust. Its as smooth as a babies ass. He did do a little bit on the intake but didnt want to take to much out.

    The forks will have adjustability like a normal big bike

    the stock weight of the 250 is 357 lbs thats with all fluids and full tank. I haven’t started shedding the weight of it yet, I am working in Abu Dhabi and wont be home until mid January, I am not going to go really drastic on dropping the weight of it as it will still be used in town and will give the wife a few rides after our baby is born.

    My main thing was the crappy suspension that the bike has, its great for an 160 lbs rider, but im not 160 lbs. The mechanic is a good friend of mine that also races a 600cc. His 600 will stomp a mud hole in most 1000cc bikes ass. He has done a lot of work to his 600, his rev limit is set at 18,500 RPM. He did all the engine work himself except for the crank, he sent it to California to get it shaved and balanced. Oops getting way off topic, he is also a suspension specialist we set down one day and discussed the 250 he suggested doing the bore kit and all the little extras, as another friend of ours rides a Kawasaki 250 and has a lot of money in it, so I decided WTF why not go all out on my 250.

    Its funny I am doing the same thread on another forum and the guys are ragging my ass about spending so much money on a 250, get a bigger bike, do this do that instead of wasting the money on a 250. My answer to them I own a 1000 when I feel the need for speed I know which bike to get on, but I am not going to race my 1000 at the track. I am 47 years old and have no desire to do 180 MPH down the straight, shed a few gears drop speed down to 60 MPH for the sharp left hander right after the straight. Plus on my 250 if i grab to much throttle in a turn, i dont have to worry about it like i would on my 1000.

    In the end I plan on keeping the 250 unless I total it in a crash… God willing that wont happen, but it will go to my son once he is old enough to ride it. I plan on teaching him how to ride at an early age, like a few days after he is born J/K there is a place close to my house that sells little electric pocket rockets with training wheels on them, He will get one of those for his 3rd bday.

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #62722
    Profile photo of conrice
    conrice
    Registered Member
    RideCBR Newbie
    Points: 654

    Very cool. My wife’s first bike was a GS500 and it was a blast to ride albeit, not that fast. Small bikes are just as fun as big bikes. Sometimes, nothing beats being able to flog four gears of the bike at WOT and still only be going 75mph.

    If its fully adjustable-great. I know guys with some older small bikes will throw a 600/1000cc front end on their bikes to get adjustability and better braking, but you got all of that without swapping.

    And it’s good that the intakes aren’t polished – you don’t want that. On the exhaust side, it’s all good though.

    That sounds like a pretty good deal with your mech.

    #62729
    Profile photo of theredrocket
    theredrocket
    Registered Member
    RideCBR Guru
    Points: 33,444

    @sdm1 if I listened to my dad and family, I’d never have gotten into sportsbikes and be on a hog. You do you boo boo! Let them ride the “bigger bikes” even though you already have a liter. I miss my F3 and it was a slug compared to my RR. Like you said, I never worried about loosing the rear end with my F3. You could peg the throttle and was just plain fun. My RR can be scary dumb and takes finesse when ripping the curves. Have fun with your projecs, dont let anyone stop what makes you happy.

    #62734
    Profile photo of bambam
    bambam
    Registered Member
    RideCBR Guru
    Points: 22,470

    Dayum Ray! This 250 build thread is awesome. I like the way you guys sat down and thought this all out prior to the build , throwing parts at bike doesnt always reap the wanted reward and these mod look very well thought out.. It sounds like this will be an animal on the track , as for the other forum , What other forum? There are others??JJ

    A built 250 sounds like a lot of fun. I guess i still remember the baddest bike in the hood growing up was HONDA 250R three wheeler (and it was stock!), that thing would scare the hell out ya , —— -250cc. Mad respect for the 250.

    The port work looks amazing. and the internals look surgical clean.

    I hope you find the front brake set up even tho youve got a temp fix with the new pads. As for that Mech , he seems like a very capable dood, His work looks mean and clean. I dig the custom exhast , alot of the high end stuff i see is built that way with the segmented rings and fine tig welds. Real nice!
    Very cool build brother.

    #62746
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    @conrice

    I lied the 2nd picture was the intake, but yeah he didnt do much work on it, just touched it up a little. Sorry just noticed it was the intake.

    @theredrocket
    Lol no brother I dont listen to what others think, now if they where paying my bills and giving me a little somethin somethin on the side then maybe I would listen…. Maybe, and you are correct with my little crotch rocket 250 I can twist the wrist WOT in the middle of a turn and nothing to worry about.

    @bambam
    Thanks for the comments bro, we did discuss just about everything like always a few small items popped up that we where not prepared for, but thats with just about any build. The custom header came out to 2500 pesos roughly $56.00 USD thats pipe and fabrication. Now had I taken it to the welder it would have been $200.00 USD as I am American in foreign land. I am still working on the front braking system. Once I can get home and get it to the track then ill know what I need to do, would be great if just the pad upgrade will work, if not ill have to dig into the wallet again.

    Well bike is finished mechanic just gave me the bill. Cant wait to get home and test out the 305cc :D

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #62749
    Profile photo of conrice
    conrice
    Registered Member
    RideCBR Newbie
    Points: 654

    $56?

    Where do I sign up? Even $200 is reasonable for the amount of fab and welding those bends call for.

    I can’t imagine what that’d cost state-side.

    Can’t wait to hear your initial impressions of it. That thing is going to lots of fun.

    #62755
    Profile photo of 01cbr600f4i
    01cbr600f4i
    Registered Member
    RideCBR Regular
    Points: 1,828

    ^Agreed!

    You’re lucky your mechanic has so much interest in your project! Looks like great work and would be a super fun build.

    I thought I’d take the time to point out your techs choice in safety footwear when fabricating your pipe though haha :rotfl:

    #62761
    Profile photo of theredrocket
    theredrocket
    Registered Member
    RideCBR Guru
    Points: 33,444

    @01CBR600F4i said:
    ^Agreed!

    You’re lucky your mechanic has so much interest in your project! Looks like great work and would be a super fun build.

    I thought I’d take the time to point out your techs choice in safety footwear when fabricating your pipe though haha :rotfl:

    I was thinking the same thing! hahaha I hate when bb’s get in my gear. I cant imagine no foot protection. Dude must have feet of steel :wow:

    #62795
    Profile photo of admin
    admin
    Registered Member
    RideCBR Guru
    Points: 127,277

    Lookin’ really good bud!

    #63254
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    After doing a little more research I found that if you take a throttle tube from an R6 and install it on the 250 it makes the throttle wide open at just 1/4 turn. I was looking for a quick turn throttle and stumbled across an old write up someone else did on tracking their 250.

    The white tube is the R6 the black is the 250, you can see a major size difference.

    The dot is the off throttle position

    Here the dot is almost 1/4 throttle and that is wide open.

    I am hoping this will help my wrist, I broke it when I was a teenager, didn’t let it heal properly and only have limited throttle twisting ability. In order for me to operate a normal throttle I have to really rotate my hand down and forward while dropping my shoulder to be able to go WOT which after long rides really makes my hand and shoulder tired. I am not sure if it will work on my liter bike also, but I bought 2 for just in case. The bad thing is it cost me a total of $38.00 with shipping for the both :rotfl:

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #63257
    Profile photo of theredrocket
    theredrocket
    Registered Member
    RideCBR Guru
    Points: 33,444

    Sweet! Handicaps suck :cry: I’ve had a few accidents in my life and my feet tendons and joints dont work like they should. Mostly though my lower back is rapidly declining. A much needed seat mod is in the near future. Glad you can accommodate to your wrist with the cool trick.

    #63519
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    Made it home last night 1/15/2015, woke up this morning installed the 13T front sprocket, rear taillight with sequential turn signals took it out for my first test ride since all of the mods have been done. First impression….. SPEECHLESS!!! This is a whole new bike, I know 250 is small cc bike but you couldn’t tell it from the grin showing through my helmet. With the bore kit and new cams this is a monster now. Really pulls hard from 8k to redline at 11.5K shift into second and the bike throws you back in the seat, first time I did it the bike tried to throw me off. The new suspension upgrade is like riding on a cloud, soft and smooth yet aggressive when you push it hard. I found a side street that was empty, pulled the front off the ground it friggin power wheelies now in first gear. No clutch up just roll off/on throttle and up it comes.

    Weather permitting we will be taking it up the local twisty here tomorrow. Cant wait to really push it and see how it handles, I am sure she wont let me down. My little 250 will be going up against an RSV4, Ri & R6, cant wait to see the guys face when I pass them on the turns and pull away. They will kill me in the straights but no longer be able to do it so easily on the turns.

    I am still waiting for my 42T rear sprocket to come in am sure it will be even better. Will post up pix later have to do a few things before that.

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #69132
    Profile photo of sdm1
    sdm1
    Registered Member
    RideCBR Guru
    Points: 20,857

    Haven’t updated in a while shortly after the motor got broke in we took it for a long ride about 500 KM the wrist pin blew apart causing the connecting rod to bend, and bending all 3 shift forks, also minor scaring in the bottom of the bore. I ordered a new JE 298cc piston, had to get the crank just to get the connecting rod (that sucked) all 3 fork shifters plus all gaskets, had the cylinder re bored to smooth it out.

    Fast forward 2 1/2 months its finally back together, I am a little pissed at my mechanic he really fucked up my fairings, all kind of deep scratches on the custom paint job. I will have to take it in and see if they can buff them out. Or might just buy new race fairings and get them painted. Dont really want to put more money into it anymore, if the motor blows again ill just go buy a Kawi 300 and use it for track riding. I told the wife she got mad as hell lol. Maybe I should just buy a new 300cc Honda motor have looked on line and cant find anyone that sells them.

    I took it out today to test drive it and it feels really strong, finally got around to putting a 40T rear sprocket on it that made a world of difference. Stock is 38T on the 250 so now its -1/+2 it wheelies like a mad dog now. Not that I am good at them get scared as all hell but have been messing with it a little.

    2014 CB1000R
    *2012 CBR250R
    *2005 CBR1000RR - SOLD

    #69447
    Profile photo of borderline4laska
    borderline4laska
    Registered Member
    RideCBR Guru
    Points: 22,176

    @sdm1 damn dude that sucks about the motor after all that work! I read this whole thread and when I got to the part where the wrist pin blew I literally cringed! Excellent write up, looks like a fun bike.. Hope you have better luck in the future and sorry to hear about the fairings alsa. Keep us updated. :)

    youtube.com/borderlinealaska

Viewing 22 posts - 1 through 22 (of 22 total)

You must be logged in to reply to this topic.