Quote by: Bill

I was told by a Thai motorbike mechanic that I could improve the performance of my Honda CRF250L by using a stock Honda CBR250R ECU module?

Is this true, will my CRF250L perform better with a standard Honda CBR250R ECU?

It's possible that the ECU module from a Honda CBR250R has a positive influence on the performance of the Honda CRF250L.

The Honda CRF250L comes standard with a 36mm throttle body, while the Honda CBR250R comes with a 38mm throttle body. The ECU module for the Honda CBR250R has a richer and more aggressive fuel map than the ECU used on the Honda CRF250L.

If you want to try to improve the performance of your Honda CRF250L you can order the Honda CBR250R ECU with article number 38770-KYJ-9019015-102488. The original “Thai” ECU for the Honda CRF250L has as article number 38770-KZZ-9018983-100028
.

If you want to go full swing you can also replace the 36mm throttle body on the CRF250L, with the 38mm throttle body from the Honda CBR250R, the Keihin 38mm throttle body used on the CBR250R is a Keihin GQ9JA. While Honda is using a Keihin GQ32A throttle body on the Honda CRF250L. The Keihin GQ9JA and Keihin GQ32A use a different injection cap, so it's very likely that you need to replace the injector (or use the injector cap from the GQ32A on the GQ9JA).

People living in Europe or the USA who want a bit more kick out of there CBR250R or CRF250L can also order this from Thai Honda dealers (the Thai ECU is 100% fully unrestricted).

Quote by: Flying Squirrel

Quote by: ThaiDesign

People living in Europe or the USA who want a bit more kick out of there CBR250R or CRF250L can also order this from Thai Honda dealers (the Thai ECU is 100% fully unrestricted).

Just curious. Is it possible the PCX 125 in the US has a different ECU. Many US riders complain that they cannot get the top speeds reported in Thailand from their US PCX's.

Yes it's very likely that the US and European Honda PCX 125 and PCX150 are equipped with an ECU that is more concentrated for fuel efficiency and less to performance. The ECU for the Thai Honda PCX125 and PCX150 is more aggressive, more performance but that comes with less fuel efficiency.

To avoid misunderstandings, the Honda PCX125 and PCX150 use different ECU's which are reported to be incompatible to another (do not use a PCX150 ECU on a PCX125).

PS: Why is the captcha case sensitive???!!! These things are already difficult enough. Here goes attempt 7 or 8! Next time I won't bother...

If you register and login there is no Captcha

Quote by: ThaiDesign

Quote by: Bill

I was told by a Thai motorbike mechanic that I could improve the performance of my Honda CRF250L by using a stock Honda CBR250R ECU module?

Is this true, will my CRF250L perform better with a standard Honda CBR250R ECU?

It's possible that the ECU module from a Honda CBR250R has a positive influence on the performance of the Honda CRF250L.

The Honda CRF250L comes standard with a 36mm throttle body, while the Honda CBR250R comes with a 38mm throttle body. The ECU module for the Honda CBR250R has a richer and more aggressive fuel map than the ECU used on the Honda CRF250L.

If you want to try to improve the performance of your Honda CRF250L you can order the Honda CBR250R ECU with article number 38770-KYJ-9019015-102488. The original “Thai” ECU for the Honda CRF250L has as article number 38770-KZZ-9018983-100028
.

If you want to go full swing you can also replace the 36mm throttle body on the CRF250L, with the 38mm throttle body from the Honda CBR250R, the Keihin 38mm throttle body used on the CBR250R is a Keihin GQ9JA. While Honda is using a Keihin GQ32A throttle body on the Honda CRF250L. The Keihin GQ9JA and Keihin GQ32A use a different injection cap, so it's very likely that you need to replace the injector (or use the injector cap from the GQ32A on the GQ9JA).

People living in Europe or the USA who want a bit more kick out of there CBR250R or CRF250L can also order this from Thai Honda dealers (the Thai ECU is 100% fully unrestricted).

Both these mods are well worth doing. The CRF performs so much better. In particular revs out longer in each gear. Feels like a totally different bike now. Cost for both from Honda dealer BHT6020. I have however also combined it with an aftermarket exhaust and airbox mod. Throttle body comes complete with all parts including fuel injector . Well worth doing

I do not think that Honda has used another ECU for the CRF250M, but to be sure you need to wait until 30 January, as Honda will display the CRF250M at the 2013 Bangkok Motorbike Fest in Bangkok. This will be the first time that we can get close enough to check it.

Quote by: Brent

Great Information! I want to try the ECU on my 250L! But how would one get ahold of the Thai ECU when located in the United States?
My basic search's have left me empty handed on how to get ahold of the 13' CBR ECU.

Hello Brent,

The best thing you can do is to register to this website, so that other members can contact you by Personal Message (PM), some of our members are selling motorcycle parts and ship them worldwide.

Hello Brent,

The best thing you can do is to register to this website, so that other members can contact you by Personal Message (PM), some of our members are selling motorcycle parts and ship them worldwide.
[/p][/QUOTE]


Thank you for the information on what to do in order to get the PGM-FI. I WILL be registering to the website! Now I have a question regarding something mentioned by Thai Design earlier in the thread.It was said the Thai PFM-FI is unrestricted, now I am curious, what is unrestricted compared to the U.S. PGM-FI?

~Thanks