[rhiocrf230]

has anyone done this to this bike. Is it worth it. I have added a works rear shock and installed the power up kit and uncorked the bike. It is now a blast to ride. I was looking for some more power. What % of increase should I expect or is the kit just hype with not to much in results. I want to do the project this fall...thanks....

[redrider250r]

I dont think ive ever heard of someone putting a big bore kit on a 230f. To be honest i feel like it wouldnt make that much of a difference but i could be wrong?

[Old Dude]

Check out Engines Only('s) web site. They have their BB kit dyno results posted. Also Mike Coe makes a kit that performs very well. Both of the above have great reputations. If you go with a BB kit you should also update the carb and cam as recommeded by the manufacturer for max benifit.
O.D.

[crfsonly]

we have many customers who have purchased and had excellent results with the BBR big bore kit with cam and high performance valve springs.

http://www.crfsonly.com/catalog/product ... ts_id/3529

the high performance cam along with a higher compression larger piston make a significant difference in performance while maintaining the 230F's reliability.

[ChuckMutt]

I have the BBR big bore kit w/cam and BBR exhaust in an '06 CRF230F and it is a new bike. Open air box and re-jetted carb also. I also have a stock '05 CRF230F and can side-by-side compare the two. The "CRF240F" has much more low end torque and top end speed. Now I am looking for a Keihin FCR carb to smooth the throttle response. It has the ability to pull good wheelies and jumps and can hang with a KTM250 on the trails. I believe that with a Keihin FCR I will be able to challenge on the track.

[crfsonly]

welcome ChuckMutt. excellent first post!

ken

[kunkle]

has anyone done this to this bike. Is it worth it. I have added a works rear shock and installed the power up kit and uncorked the bike. It is now a blast to ride. I was looking for some more power. What % of increase should I expect or is the kit just hype with not to much in results. I want to do the project this fall...thanks....

Tons of stuff you can do to the engine! The stock engines are built so mild. Engines Only, Coeshow, Powroll, and of course BBR make kits.

A higher compression piston like the BBR and a cam compliment each other and will really wake up the bike. You WILL notice the difference!

I went with a BBR piston from Ken here and an 89A Webcams cam (biggest cam that will fit without major head mods- the BBR cam is still fairly mild which is why I didn't get their whole kit) along with porting the head and intake and boring the stock carb to get essentially an XR250 carb of 30mm instead of 26mm. Should be more than 50% increase over stock HP of 16 I believe. Only broken in the cam so far, but just around the yard it feels like it wants to go like stink compared to the old engine!

Thumbs up on the Works shock. Might want to consider adding Racetech emulators (got mine from Ken-best price) to the forks since they're now the weak link in the suspension. Best bang for the buck.

[crfsonly]

we are also a webcams dealer so if anyone is interested in their cams let me know. we can buffer you from the pain of doing business with them directly.

ken

[kunkle]

we are also a webcams dealer so if anyone is interested in their cams let me know. we can buffer you from the pain of doing business with them directly.

ken

Wish I'd known that before. I bought my webcam from an ebay company that wouldn't return any calls from my machine shop among other things- never again.

[crfsonly]

wish you had too! we don't have them in our catalog primarily because they are typically require a "walk through" on what other valve components will be used. plus the core issue for some of the cams.

ken

[Old Dude]

I agree with Kunkle on this combo. This past weekend I did a shake down run with this combo in my Dual Sport 230 and there is a definite improvement throughout the power curve. Now I need to get to that XR250 carb sittin on the work bench.

O.D.

[kunkle]

I agree with Kunkle on this combo. This past weekend I did a shake down run with this combo in my Dual Sport 230 and there is a definite improvement throughout the power curve. Now I need to get to that XR250 carb sittin on the work bench.

By combo, do you mean BBR piston and 89A cam? "...definite improvement throughout the power curve..." Can you elaborate? Hold on tighter, power wheelies?

Only broke in the cam so far and part throttle around my yard so don't know how much of a beast it is, but sure feels like it wants to rip now. Maybe this weekend to the trails if weather isn't crappy. Still seems great off idle- don't think there's any decrease in driveability.

[Old Dude]

Yes BBR and 89A cam. Have not had it in the dirt and have it geared more for street cruising. It's definitely not anywhere close to my 250x. Its been 23 years since I did any street riding so I took it easy with the thing. Hold on, rip you arms off power? No. Wheelie with just the twist of the throttle? No. Not with me on it. My young SuperMoto riding, mechanic buddy had no problem carrying the front wheel the entire length of the parking lot. Noticeable power on demand crisp and steady pull everywhere. I would really like to ride a stocker back to back with it.
O.D.

[kunkle]

Yes BBR and 89A cam. Have not had it in the dirt and have it geared more for street cruising. It's definitely not anywhere close to my 250x. Its been 23 years since I did any street riding so I took it easy with the thing. Hold on, rip you arms off power? No. Wheelie with just the twist of the throttle? No. Not with me on it. My young SuperMoto riding, mechanic buddy had no problem carrying the front wheel the entire length of the parking lot. Noticeable power on demand crisp and steady pull everywhere. I would really like to ride a stocker back to back with it.
O.D.

Had the impression you had the dualsport for some time and rode street a lot.

What kind of gearing does it have? I put 14/48 on mine but haven't had it out yet to any trails.

[Old Dude]

14/50 right now, so its pretty low geared for the street. I have a 49 on the bench... may try a 48 also. Any help in this dept would be appreciated and may save me a few bux.
O.D.