Re: Honda CBR 250R

Ok i will chech that.

Re: Honda CBR 250R

An improperly installed coneset (i.e. the steering stem race and bearing balls) will give up sooner than normal.
You could also hold the front brake and try to rock the bike forward and backward.. if you notice some play/loseness in the handlebar area, you could first try to adjust i.e. tighten it.
If it was installed and over tightened, the handle bar movement will not be free and can be felt uncomfortable. In this case it needs to be loosened a bit. This can also be checked with the front wheel up and turning the handle side to side.. which is next to impossible on a bike without a center stand.

both these cases, if not addressed quickly will lead to premature failure of the bearing balls/races and will need a replacement. some mistakes that make the install fail prematurely are:
1. not seating the races properly flush with the steering stem inner tube.
2. not applying sufficient good quality grease (also avoid directing high pressure wash to this area)
3. improper tightening.. usually you might have to go back after a couple of days to get it adjusted correctly, not always possible to get it right first time.

Re: Honda CBR 250R

I tried to rock the bike forward and back ward Nothing unusual noticed. But when i turned the handle bar side to side it was not moving freely. Its getting stuck at the center. I will try to adjust it first. What is the life of conset in average conditions? I recently hit a large pothole and my fornt and rear alloys got damged. I dont know whether this impact affected the conset or not. There is no problem in cornering. But low speed handling is vague. I felt that there is some play or something like that

Re: Honda CBR 250R

yep, and one more thing.. make sure the tire pressure is right. low tire pressure will cause difficulty in turning the handlebar (when the tire is touching the ground) been there seen it happen!

Re: Honda CBR 250R

Yeah i checked that. I am maintaining 29 at fornt and 33 at the rear

Re: Honda CBR 250R

The pressure level you're maintaining is perfect. Steering stem, chain sprocket, tires all age independently of each other and given the riding circumstances it varies from user to user. For some, some parts really long, for some it's mediocre. An impact so severe in all probability can ruin the coneset bearings too. Once they pit inside the race, they lack uniform motion and cause grabby handlebars and as you've right mentioned, you'd always feel a twitchiness in slow riding, as if the bar is turning and grabbing at certain points, it's very minute but you can feel it. Coneset bearings have to be replaced.

Cheers!
VJ

Re: Honda CBR 250R

I have attached my bikes pic and marked the particular part.Can Anybody tell me what is that? i think it is Under cowl.
why i am confused is because Honda Service centre mechanics told me that it is engine guard and as they dont have it in stock they took my order ,told me to wait for their call and quoted me around 500Rs.
But this site retails it @rs.113
COWL,R UNDER - The Spares Company - Where Genuine Is Real

Re: Honda CBR 250R

Everything you've mentioned is right. The website also has posted the correct Part Number which is the Right Under Cowl. The only thing they've botched up is they've not uploaded the right picture and lists the same picture for all the spares listed on their website. OE spares are costly for the CBR and I think this can be replica of the part or a genuine one. Also the site lists it as Manufacturer: Honda. Brand: Honda which again adds to the confusion. I'd suggest you go ahead and make an order from them, if you get the OE one, very well. If you find it is a replica/Delhi made, you can opt for refund.

Contact them through their phone number listed on the chat window before making a purchase. Keep your observations posted.

Cheers!
VJ

Re: Honda CBR 250R

So, finally with the help of a bhp'ian, Karthik from Tansi shipped the parts to me and I got the work done in Didar, Egmore. Came back to home and realized there's a layer of oil under the engine. Took it back to them again and am told the issue was with the way the gasket(?) was placed. 15 mins later, I rode out and it's been all great.

Completed another 300 kms round trip to Tirupati and the bike and me - both are happy. No oil spills now, and pushed the bike to 120 kmph for a few mins while most time was spent in the 100-110 kmph range. I love the stability the bike has and the 150 kms from Tirupati to Adyar was competed it 2.5 hours, starting at 6 AM.

While Didar is nice, am a little concerned with the workmanship - met a guy who is good (and certified by aargee with his observation), will prefer him from next time. Another guy had worked on the seal last time, leading to the mess.

Re: Honda CBR 250R

My cbr has clocked 58k km. Here is update on some of the parts changed recently.

Spark plug and coneset changed for first time at 53k odo.

Front wheel bearings changed at 58k odo.
Prior to replacing, I was feeling that bike was wobbling a lot whenever I use front brakes. Wheel was opened for inspection, turned out that bearing was broken into two.


pictures of spark plug and broken bearing



Low beam of headlight bulb burned out yesterday. I was using Philips Xtreme vision plus which was better than stock. Can somebody suggest a better alternative setup?

Engine oil consumption is high since last 15k km. I used to put shell advance ultra but because of excessive consumption I switched to shell AX7 to compensate the cost of excess oil.
As per mechanics whole cylinder kit is to be changed which will cost 10000 bucks. I was wondering if replacing just piston and rings could solve the issue ? replacing these will hardly cost 2000 bucks.

Re: Honda CBR 250R


Is your bike emiiting white smoke?

Re: Honda CBR 250R

No, no smoke from exhaust

Re: Honda CBR 250R

Not bad a life for the coneset, front wheel bearings and spark plug. Osram NightBreaker is a better alternative, though it's mildly whiter than a stock bulb, not as white as Xtreme Vision and life is comparatively lesser on both XV and ONB. With respect to the vehicle consuming oil, I'd recommend you to do a compression check, this would let us know if the rings/valves are leaky and required to be replaced. Make sure to get a compression check done at the SVC and do keep your observations posted.

Replacing rings are cheaper than replacing the piston itself, but we must know how well the piston is, if there is slack in piston and what not considering the kays clocked. Also observe for smoke during morning and when fully revved.

Cheers!
VJ

Re: Honda CBR 250R

Thanks VJ for your response.

There is no smoke in morning starts but when fully revved it throws black smoke but that is not very high. I am unable to upload a video of it, can somebody help me in this ?

Low compression should effect engine performance ?
I checked for acceleration and top speed. No degradation in performace observed.

Re: Honda CBR 250R

Hey guys, been a while since i posted on the forum, i have made a new mod to my cbr, in terms of the coneset, which kept giving me issues in the past. I have changed from the stock ball bearings to tapper rolled ones. Its a mod that anyone can do, and whats the advantages of this?
1)it lasts the life of the bike. My last coneset kept giving me a lot of issues with handling and that katak katak noise frequently and turns out they were not set up properly and unevenly placed. The tapper rolled bearings will last the life of the bike unless i have a major crash(god forbid), its a mod can be done to any bike just need the inner and outer diameter of the existing coneset and the space inside the frame.
2)handling and turning immediately improved, Making the bike very flickable and much easier to turn or lane split.
3)they cost about 2-2.5 k to fully make and install and didn't mind spending it because it improves my front end handling and never have to bother about coneset replacement or adjustment for a bit. I am attaching a few pics below for reference. You can also see the ball bearings in one of the pics soo you'll get a idea how it works. And also another update, bike is 2k km away from 50k km, really pleased soo far, and the last 2000 kms on the shell oil has been absolutely great and smooth, will see the state of the oil around the 3-4k km mark.