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**nomad_sachin** · 08-23-2017, 01:06 AM

Re: Honda CBR 250R

Originally posted by B7ACKTHORN View Post

One can run an FI motorcycle till the bike comes to a complete halt. I completely second the last mile calculations by you guys when the last bar is blinking. But mind you, the fuel pump is required to be submerged in the fuel itself for it to run effectively and in some cases prevent air in the lines too. When having a habit of running the motorcycle dry to dry in an FI engine, the fuel pump weakens over time and can fail prematurely. This is why even though an FI engine stops running out of fuel, and when one inspects the tank, you can see some amount of fuel that's left in the tank it's to safeguard the fuel pump from going excessively dry and cause an air lock or failed fuel pump motor.

But, relay costing close to 250 to 300 I'd definitely suggest you change the relay for peace of mind.

Thanks for your insight on both the matters.

I refill the tank when last bar on the display starts blinking. That shouldn't cause any harm to the fuel pump I believe.
As suggested by Leech and you, I changed the relay. It costed 144 bucks.

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Originally posted by theironhorse99 View Post

7k is too early for chain tensioner but there have been cases of bad tensioner batches with honda. also have you been using any other engine oil ? motul 300v specifically ???

Anything wrong with 300v ?
Initially I read a number of posts on various forums praising 300v. But lately I have been seeing posts advising not to use it.
I have been using it for last 17k km. I drain it every 7K km. Works fine for me, haven't faced any issue until now.

Btw I am thinking of switching to Shell advance ultra which appears to give similar performance at a comparatively lesser price.

**B7ACKTHORN** · 08-23-2017, 03:25 AM

Re: Honda CBR 250R

Originally posted by nomad_sachin View Post

Btw I am thinking of switching to Shell advance ultra which appears to give similar performance at a comparatively lesser price.

Aman, will definitely get back to you on the 300V. My experience with Shell Advance Ultra 10w40 has been really praise worthy to the say the least. The oil is on par with 7100. From my experience of the 7100 and Shell AUX, the latter is by far a better choice.

Cheers!
VJ

**Ave2592** · 08-23-2017, 06:30 AM

Re: Honda CBR 250R

Originally posted by B7ACKTHORN View Post

Aman, will definitely get back to you on the 300V. My experience with Shell Advance Ultra 10w40 has been really praise worthy to the say the least. The oil is on par with 7100. From my experience of the 7100 and Shell AUX, the latter is by far a better choice.

Cheers!
VJ

[QUOTE=nomad_sachin;.

Btw I am thinking of switching to Shell advance ultra which appears to give similar performance at a comparatively lesser price.[/QUOTE]

Hello nomad_sachin and B7ACKTHORN. I have recently got my bike's second servicing done. And I have used shell advanced ultra and motul 7100 10w40. I am newbie so my thoughts on those might be wrong. But as much as I have personally felt, if anybody wants to ride smoothly then nothing can beat the shell advanced ultra... (Hands down). And with the 7100 10w40, what I felt was that the bike is always ready to hit the rpm, all you need to do is give some more throttle. I understand that there is a comparison of shell advanced ultra and motul 300v. But I have just shared what I felt.

Sent from my NX529J using xBhp.com mobile app

**madhav766** · 08-23-2017, 09:56 AM

Re: Honda CBR 250R

Originally posted by theironhorse99 View Post

you will end up spending a lakh and gain about 1.5 seconds off 0-100 and maybe another 5 hp extra. not worth imho for a 250.

1. Full exhaust system - - nothing less than 40k for a full system
2. A full exhaust system needs to be complemented with an equally good fuelling system, and by the looks of it Pratik's sir's Area P fuel controller seems to be doing a kick ass job. - another 20k plus maps according to weather and temperature and always on the verge of a blown engine for a 250 is not at rock solid as those inline 4's
3. I really want to remove the pillion foot rest pegs and stalks, the pillion seat and replace it with a seat cowl. - another 3k for the cowl.
4. REARSETS! This is something I really want to get done right away. I am going to source a pair of rear set brackets ASAP and go ahead with shifting the stock footpegs. I'm simultaneously going to drop the front with 20W oil and little spring tightening to account for my weight. - ninja 250 springs are direct fit however cheaper mods include shifting from 5w 331ml to 20w 350 ml and increasing spacer by 10mm.
5. Talking about the front suspensions, I've been looking up better options for the rear shocks too. I'm not really clear on this - is the stock monoshock adjustable? I don't see a tool to adjust this included in the tool kit! I may end up getting a performance exhaust after all. - set to softest you can change it from 5 to 3 and it will do just fine.
6. Pratik sir dropped a majority of weight on Ninja-san by swapping out the bloody wheels themselves. I dunno if that's possible for the CBR250R, but I'm gonna look either way. Wheels and tires are a great way to drop unsprung weight. I do not know of any other way to do this, do any of you know about it? - those wheels would cost almost a lakh and make you go .02 second faster.
7. I'm really considering investing in a pair of ceramic ball bearings for the wheels to reduce friction, thus decreasing loss in power and torque. - nothing is gonna change dramatically on a 250.
8. Pratik sir also changed the ignition coil and added an ignition booster. The mod supposedly boosts power and torque figures by a teensy bit. - supposedly
9. I'm also considering getting the airbox and undertank insulated just like on Ninja-san. This prevents the respective parts from facing the extreme heat that builds up in the tight spaces that receive little to no air flow. A cooler engine is a happier engine after all! - another 0.2 hp maybe and we cannot change indian weather which is hot naturally most times of the year
10. I'm also very keen on replacing all the bolts on the bike with Lightech bolts. This dropped 250gm on Ninja-san. Very curious what it'll do on the CBR250R. - 250 grams hardly matter on 250 isn't it

Finally some interest in my post. :P You are absolutely right. 1-1.5lakh is really the bottom level for the mods I've described. I highly doubt being able to go through this stuff, and like you rightly said, for a single 250, it's definitely overkill. But hey, I'm an idiot and someone decided to pay me well.

The full exhaust system I have in mind costs about 72k, and I wouldn't ever do that without a good fuel map. While adding the exhaust is a questionable pursuit, wouldn't a good fuel map help all in itself? From what little I've read, manufacturer stock maps are basic at best and are done on a budget. Having a detailed fuel map, like you said, taking weather, conditions, fuel, etc into consideration, I anticipate a healthier engine. I'm not exactly looking at outright BHP/Nm gain. A good fuel map, done right for the streets should show a boost in FE, no?

Yeah, the seat cowl seems a bit overkill to me too. I'm not exactly looking to take the bike to the track. It's more of a beauty mod in my mind.

I'm going with the 20w motul fork oil mod for the front suspension soon. Will report changes here.

The wheels do cost a lot, and as you said the difference in speed is not exactly worth it for street use, but I'm not looking for outright BHP gain. It's a rather intriguing prospect to see what the CBR can do when treated well.

Coming to ceramic ball bearings and under-tank insulation, you say nothing will change dramatically, but that may be true when you are looking at BHP gains. Reduction in loss means you run a more efficient bike-less wear and tear-improve mileage and life of the parts directly effected by the mods. As you rightly said, India is a hot place throughout the year and I feel protecting your bike from that all round heat can only do good. Tank insulation and ceramic ball bearings are the mods on the list that make the most sense to me.

Ignition coils and ignition booster, I'm very sceptical about those too. I don't see how they can make a difference and I frankly feel that they may be dangerous. However, with the right fuelling, they MAY be good. It's up for debate and I'm doing as much research as I can on the topic.

Well, the bolts are probably the last mod on my mind(and on the list). They are just an afterthought!

Originally posted by leech View Post

"Wheels costing a lakh and .2 seconds faster" - this cracked me up.

Also one can simply remove grab rails, mirrors, cat converter, indicators, number plate, and the rear set pegs.

On the personal front, one can remove T - shirt (50g savings), and jeans(500g). A simple lungi/dhoti would not only help you win swadeshi points but also save on weight.

If the above doesn't satisfy, you can consider removing some unwanted body parts like one kidney(100g) and since the liver is a regenerating organ, you can consider donating a piece before you do a track day. Just 500g makes a huge difference to your timings.

That really cracked me up Leech!

I'm gonna try shaving my head and cutting my nails before the next time I ride. I'm sure it will improve my 0-100kmph time!

**leech** · 08-23-2017, 11:06 AM

Re: Honda CBR 250R

[MENTION=43265]madhav766[/MENTION] - all the best for the mods. Very few people actually take time out to mod the bike, because the risk-reward profile doesn't make sense.

A basic financial analysis would show that it's way better to upgrade the bike than to mod it. There's a bike for every budget. Even a guy earning just 2L a month can get the Ninja H2, that's the beauty of the financial system these days. There are loans for every reason and season.

**Deathwing** · 08-23-2017, 11:33 AM

Re: Honda CBR 250R

@vj got back my bike , two days back , my cone set replaced and fork oil seals, fork oil and the bend was fixed. The bends on the t stem n handle bar was fixed too, had to pay a bill for 3600 which rose upto 4029 because my Right mirror broke and took out the left as it was sticking out out, now have both mirrors back on, almost immediately I can feel the change in handling , after coming from a borrowed duke you cannot say how comfy my Ceeber felt, front and back suspension on the duke was gone soo ya coming back to the Ceeber really made me appreciate and realize how much I missed my ride. Also small update been using 300v motul for the past 3800 kms, bike feels mighty smooth [emoji5]

Sent from my Lenovo A6600d40 using xBhp.com mobile app

**hypheni** · 08-23-2017, 12:54 PM

Re: Honda CBR 250R

Originally posted by B7ACKTHORN View Post

Just like any carburetted engine, the FI system can sometimes be erroneous in feeding more fuel than necessary to the engine causing flooding. Think of this as excess choke. The way the injectors are fed is by reading is by checking the coolant temperature and o2 sensor and then the ECU regulates the fuel flow. Sensors being sensors do have dead time or a heat value at which they optimally operate so that's why sometimes they just start well and then stall. That's why opening the throttle WOT on a FI stops the fuel injection and the cranking of the engine disperses all the fuel vapors inside the cylinder when held WOT for 5 to 10 seconds. When you close the throttle to normal, the FI clears its throat and starts injecting fuel and the bike cranks.

Cheers!
VJ

Thank you and yes I was really expecting your inputs. So can I help it somehow by keeping a good fuel level all the time or there is nothing to be done as precaution for avoiding such situations.

**B7ACKTHORN** · 08-23-2017, 04:11 PM

Re: Honda CBR 250R

Originally posted by Ave2592 View Post

Hello nomad_sachin and B7ACKTHORN. I have recently got my bike's second servicing done. And I have used shell advanced ultra and motul 7100 10w40. I am newbie so my thoughts on those might be wrong. But as much as I have personally felt, if anybody wants to ride smoothly then nothing can beat the shell advanced ultra... (Hands down). And with the 7100 10w40, what I felt was that the bike is always ready to hit the rpm, all you need to do is give some more throttle. I understand that there is a comparison of shell advanced ultra and motul 300v. But I have just shared what I felt.

Sent from my NX529J using xBhp.com mobile app

Indeed. Shell AX7 Advance Ultra is best suited to the CBR 250R.

Originally posted by hypheni View Post

Thank you and yes I was really expecting your inputs. So can I help it somehow by keeping a good fuel level all the time or there is nothing to be done as precaution for avoiding such situations.

It's always a good idea to keep at least 2 liters when it come to FI motorcycles, I personally would recommend this practice. Of course when it's inevitable that you run dry, there's nothing that one can do rather worrying about the fuel pump than to hunt for the nearest fuel station.

But, disadvantage ,yes, the bike will run till the pump eventually is starved of fuel. So, one needs to be sure to refuel as soon as the last bar blinks. It's just a safety net one cannot miss.

Cheers!
VJ

**hypheni** · 08-23-2017, 07:12 PM

Re: Honda CBR 250R

Originally posted by B7ACKTHORN View Post

It's always a good idea to keep at least 2 liters when it come to FI motorcycles, I personally would recommend this practice. Of course when it's inevitable that you run dry, there's nothing that one can do rather worrying about the fuel pump than to hunt for the nearest fuel station.

But, disadvantage ,yes, the bike will run till the pump eventually is starved of fuel. So, one needs to be sure to refuel as soon as the last bar blinks. It's just a safety net one cannot miss.

Cheers!
VJ

Yes, I always refuel only when it starts blinking or max 30-40kms post to it. So I'm not keeping the fuel pump dry. In the last occasion 2lts was there when I had that horrible experience. So I believe there is nothing much we can do about precautions.

**JoshAraujo** · 08-23-2017, 10:18 PM

Re: Honda CBR 250R

Hello, Josh. Don't you worry, you've come to the right spot. You can start off with levers from eBay, these are decent, though cheapo MOXI, ZOCC branded levers, though I don't recommend one. You can also check aliexpress as they have assortments of accessories for CBR and they do ship it to India too.

To clarify, Moxi/ZOCC are good or bad?

If they're bad, what on ebay is worth a buy

* * *

btw, have any braver souls than I tried reversing the shift pattern on a CBR? It's quiet simple just flip the linkage from down to up. Unfortunately on the CBR, there are several things that block this. Probably needs some extra parts and maybe even a rearset

**Siddhanth Paul** · 08-23-2017, 10:28 PM

Re: Honda CBR 250R

Originally posted by JoshAraujo View Post

To clarify, Moxi/ZOCC are good or bad?

If they're bad, what on ebay is worth a buy

* * *

btw, have any braver souls than I tried reversing the shift pattern on a CBR? It's quiet simple just flip the linkage from down to up. Unfortunately on the CBR, there are several things that block this. Probably needs some extra parts and maybe even a rearset

I saw a Sato kit for gp pattern but it works only with Sato rearsets :/ costs $75

**theironhorse99** · 08-23-2017, 10:32 PM

Re: Honda CBR 250R

Originally posted by D.j View Post

Also is it normal for the CBR idle RPM to rise to 1.8k-2k rpm in each crank. Even when the temperature bar showing 3 bars?

cbr idls at 1400 rpm +/- 50 rpm. 1800-2000 is only when you crank it for first few seconds as all these FI bikes have auto choke mechanism.
check the air filter and fuel filter if clogged. also get the spark plug inspected.

**D.j** · 08-23-2017, 10:37 PM

Re: Honda CBR 250R

Originally posted by theironhorse99 View Post

cbr idls at 1400 rpm +/- 50 rpm. 1800-2000 is only when you crank it for first few seconds as all these FI bikes have auto choke mechanism.
check the air filter and fuel filter if clogged. also get the spark plug inspected.

Yeah my bike idles at 1500rpm dot .
But point is whenever I start the bike, even when I shut down at redlight and then restart the rpm rises to 1800-2000 rpm .
I understand this behaviour is good qhen the engine is cold , but whats surprising is this behaviour when the engine is hot .
I'll check for the air filter . But I was told that the CBR filter cannot be cleaned it only needs replacement at 12k kms . Is it true?

**arvstreetracer** · 08-23-2017, 10:54 PM

Re: Honda CBR 250R

Originally posted by D.j View Post

Yeah my bike idles at 1500rpm dot .
But point is whenever I start the bike, even when I shut down at redlight and then restart the rpm rises to 1800-2000 rpm .
I understand this behaviour is good qhen the engine is cold , but whats surprising is this behaviour when the engine is hot .
I'll check for the air filter . But I was told that the CBR filter cannot be cleaned it only needs replacement at 12k kms . Is it true?

It's perfectly normal. It goes up to 2k rpm for few seconds each time you start it whether cold start or warmed.

**D.j** · 08-23-2017, 11:01 PM

Re: Honda CBR 250R

Originally posted by arvstreetracer View Post

It's perfectly normal. It goes up to 2k rpm for few seconds each time you start it whether cold start or warmed.

Relief now , thanks mate
As per my earlier experience with FI bike o. R15v2 it didn't have this behaviour . If warmed up rpm will not rise in each crank .

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