Re: Honda CBR 250R

Thanks, I do know that it likes to rev up a little for few seconds if you start it fast, before it finished fuel pump priming, but never had the lights thing.

Today I've disconnected the ECM again, and on the bike side of the connector checked ECT resistance while moving the harness around, could not detect a change in value. Did the same for MAP, TP, IAT, IACV (both combinations) and injector. They all have wires exiting the harness on the same place. Cannot measure any fault. But could not get it to fault today anyhow, moving the harness, riding for hours, including bumpy offroad, starting many times, didnt repeat the light thing from the video. So basically I only confirmed that all the sensors and iacv have good resistance values...

I might have cleaned some connector by disconnecting/connecting it (applying contact cleaner also) but doubt it they all looked great. Battery is 4 years old with occasional worm up over winter without special battery charging, but it doesn't show signs of wear, I get about 12.5-12.7V from it before turning on the key, with key it drops to 12.0 which isnt the best but not the worst either. I'll put new one in over the summer, together with air filter and spark plug, parts stores not working now anyway due to covid19.

Basically only stuff that I can conclude from yesterday when it did happen often after I fiddled with the harness is:

- few times it looked like I made it happen with moving of the wires/harness of ECT (opened them up, they are not damaged, didnt open up to main harness)
- lights show again immediately as the bike starts cranking, it doesn't wait till it starts up - in the video
- like in the video, whatever I do with harness or anything, few seconds after it all settles down and bike is perfectly normal to drive, never permanent fault
- never a MIL code

All started after winter, I think I should replace the battery even though it measures good? I never remembered to measure voltage drop while the MIL/temp showed.

Re: Honda CBR 250R

From the Video and your post there are some possibilities I can think of..

1. The battery had been sitting without charge for some time. This leads to formation of Sulphates on the plates , increasing the internal resistance and hence CCA.

2. Since the bike had been sitting through winter possible condensation on connectors had taken place leading to development of loose contact.

3. That the bike responds to the input indicates a Healthy ECM ,and with RPM building up, the warning lights as well as increase in RPM comes down.

4. My bet is either Low charge , along with Sulphation of Battery or Connectors have started developing loose contact due to oxidation of contact area. I would recommend WD 40 spray on all the connectors both sides, and then check it out. If it does not help, try a battery with good charge.

A healthy battery shows 12.5 volts or higher when resting. On cranking the self starter will come down by about a Volt or at best 11 Volts depending on charge level. On engine starting up , Voltage across battery on idle should be 13.2~14.2 Volts.

Good Luck.

Re: Honda CBR 250R

Thanks a lot for your help. You confirmed my thought that ECM is fine as its compensating for it all on the startup. Every "mechanic" around here would first change ECM, then probably ECT, then likely the whole harness, and then maybe the battery. Thats why I dont even want to drive by them let alone give them my bike to work on. Sure they gonna fix it once they replace half the bike.

About voltage, I do have voltage drop below 8V on good no issues/lights cranking, sometimes 7V, never managed to measure it when its faulty. Battery will be replaced, just hope it stands fine untill the part stores open, cant get this dimension on the gas station..

Re: Honda CBR 250R

Absolutely not necessary to replace the ECM. As sir said, try replacing your battery, and degreasing the connectors every now and then. Once you replace your battery, we'll know how it will unfold. But, I am positive, it all has to do with the battery.

Cheers!
VJ

Re: Honda CBR 250R

What is the price for CBR 250R CHAIN SPROCKET SET?

Re: Honda CBR 250R

Pls Search GOOGLE bro lol

Re: Honda CBR 250R

If it is available in Google I have not posted hare bro. This sense u should have. Lol

Re: Honda CBR 250R

The stock one costs approximately 2600 + Labor charges. The same one outside, Rolon made -- the stock is Rolon made too.
Chain Sprocket Kit for Honda CBR250

These guys are pretty much fast on shipping and are the same spec as the stock 14/38. If you can, you can purchase from the above link or get a quote from the SVC and then decide.

Good luck.

Cheers!
VJ

Re: Honda CBR 250R

Thanks a lot. Any idea about racing chain sprocket???

Re: Honda CBR 250R

I'm not sure about that though there are many variants of chain available from Rolon, i.e Gold series and what not, but why spend extra if you ride the bike for city and touring. The normal sprockets are more than enough, and will last longer with proper maintenance.

Cheers!
VJ

Re: Honda CBR 250R

Thank you. I was just curious ABT that.

Re: Honda CBR 250R

I got my chain sprocket for 1900 from honda I don't think the price has increased this much.

Re: Honda CBR 250R

Indeed Harsh. 2600 approx inclusive of labour charges, so the chain might be 2k approx, plus the labour might equate another 500 approx.

Cheers!
VJ

Re: Honda CBR 250R

Hi,

I m an owner of 2011 CBR 250R. can some one let me know the steps to modify its handle bar.

I heard that you can use RTR200's Clipons how comfortable this setup is compared to a flat handle bar.

Any pointers on doing this conversion in chennai will also help.

Thanks for your help.

Re: Honda CBR 250R

[MENTION=94476]Pavithranmt[/MENTION] is the guy to answer. If I remember correctly, he's tried this setup. Using RTR 200 clip on and Honda Shine's clutch cable for the varied length. Also, you can use single handlebar setup, esp Pulsars and the like.

Cheers!
VJ