Go Back   Team-BHP > BHP India > Motorbikes


Reply
 
Thread Tools Search this Thread
Old 24th January 2013, 22:14   #166
Distinguished - BHPian
 
n_aditya's Avatar
 
Join Date: Oct 2005
Location: Namma Bengaluru
Posts: 5,139
Thanked: 2,605 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Clutchless upshifts are easier than downshifts (and less harmful to the GB and engine) since there will be lesser load on the gearbox and engine during upshifts. If the revvs are matched correctly (blipping the throttle) then you can seamlessly shift up without using the clutch.
n_aditya is offline   Reply With Quote
Old 24th January 2013, 23:57   #167
BHPian
 
dreamseller's Avatar
 
Join Date: Nov 2005
Location: Mohali/SGP
Posts: 363
Thanked: 310 Times
Default

Quote:
Originally Posted by Sutripta View Post
Actually it is even easier to make clutchless gearchanges, esp. downshifts, in a car compared to a bike. The sequential shift pattern in a motorcycle is not relevant in this regard, the lack of a well defined neutral between every pair of gears is. Cars have a well defined neutral position.

Regards
Sutripta

P.S. Ever wondered why in a DSG, downshifts take longer than upshifts?

Anyway before it becomes a controversy, here's my take on clutchless gearchanges:
Can it be done - Yes
Will it damage the gearbox - If perfectly done, IMHO, no.
Should one do it regularly - No. Because doing it perfectly 100% of the time is very difficult. And when you don't get it right, you are damaging/ causing extra wear and tear on the gearbox.
Sir, if I understood it correctly, a clutchless shift is easier in a syncromesh? On paper, it certainly seems easier though as one can play with the throttle in neutral so that the engine and transmission speeds are in sync before the gear is slotted. Will try this out on my car next time. On my bike, I normally do clutchless upshifts without any 'thud' or detrimental effect to the gearbox.
And with regards to the postscript, I'm guessing its because it takes more time for the DSG to rev up the engine to sync with the lower transmission ratio. Please do let know if that is the correct explanation as I'm not quite aware of the mechanicals of a DSG. Thanks in advance.
(Apologies for taking this grossly OT)

Last edited by dreamseller : 25th January 2013 at 00:09.
dreamseller is offline   Reply With Quote
Old 25th January 2013, 08:27   #168
Distinguished - BHPian
 
n_aditya's Avatar
 
Join Date: Oct 2005
Location: Namma Bengaluru
Posts: 5,139
Thanked: 2,605 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

See this (How to change gears) for more info (and kindly discuss this topic in the link provided). Although it applies to cars, the principle is the same.
n_aditya is offline   (3) Thanks Reply With Quote
Old 2nd February 2013, 20:49   #169
BHPian
 
evilmessiah's Avatar
 
Join Date: Jun 2011
Location: Cochin
Posts: 97
Thanked: 78 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

I didn't have any experience with bikes till I bought the CBR, so I used to downshift the 'commuter' way, ie, without rev matching. Reading up about rev matching while downshifting here prompted me to try it out.

What I did was- clutch in, blip the throttle while braking and downshift at the same time and release the clutch smoothly after the downshift. Am I doing it right?

I feel that the biggest plus point while rev matching is that the gears no longer clank or thud occasionally as they used to while I downshifted the commuter way. The bike slows down smoothly without any jerks- almost like an automatic. I think that this reduces the strain on the tranny to a good extent.

However, I find that this takes a fair amount of my concentration. It takes a lot of practice to do this effortlessly but the satisfaction of executing a smooth downshift is worth it. Time to find some really secluded roads and practice carefully till it becomes like a second nature.

Last edited by evilmessiah : 2nd February 2013 at 20:52.
evilmessiah is offline   (2) Thanks Reply With Quote
Old 3rd February 2013, 10:28   #170
Distinguished - BHPian
 
Sheel's Avatar
 
Join Date: Jul 2006
Location: Purnea(Bihar)
Posts: 4,643
Thanked: 3,838 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Evilmessiah ; You have said everything yourself. Once you master it, nothing like it. Don't sweat too much over it. The way you are going, in another few days,you will almost perfect it.

Keep practicing & keep learning. The best riders still are evolving & learning. Its a never ending process.

Cheers!
Sheel is offline   (2) Thanks Reply With Quote
Old 5th February 2013, 15:10   #171
Senior - BHPian
 
Join Date: Dec 2006
Location: pune
Posts: 1,004
Thanked: 288 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

I recently rode a 6 month old 250R having 6k Kms on odo. Idle rpm was high compared to test bike I had tried at dealer.
If idling rpm can't be changed, how is this possible? OR was it poor maintenance for that bike?
sukiwa is offline   Reply With Quote
Old 5th February 2013, 15:57   #172
Distinguished - BHPian
 
n_aditya's Avatar
 
Join Date: Oct 2005
Location: Namma Bengaluru
Posts: 5,139
Thanked: 2,605 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Quote:
Originally Posted by sukiwa View Post
I recently rode a 6 month old 250R having 6k Kms on odo. Idle rpm was high compared to test bike I had tried at dealer.
If idling rpm can't be changed, how is this possible? OR was it poor maintenance for that bike?
I'm not sure about the CBR 250R but the Ninja 250R has an idling screw which can be tweaked to adjust the idle RPM.
n_aditya is offline   Reply With Quote
Old 5th February 2013, 20:40   #173
Senior - BHPian
 
aargee's Avatar
 
Join Date: Jan 2010
Location: KATN
Posts: 4,352
Thanked: 1,360 Times
Infractions: 0/1 (5)
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Quote:
Originally Posted by sukiwa View Post
If idling rpm can't be changed, how is this possible? OR was it poor maintenance for that bike?
This is why you should go through the first 4 posts before asking questions; this has been covered there in detail - http://www.team-bhp.com/forum/motorb...ml#post2994976 (Honda CBR 250R : Answers to some commonly asked questions)
aargee is offline   (1) Thanks Reply With Quote
Old 6th February 2013, 14:46   #174
Senior - BHPian
 
Join Date: Dec 2006
Location: pune
Posts: 1,004
Thanked: 288 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Quote:
Originally Posted by aargee View Post
This is why you should go through the first 4 posts before asking questions; this has been covered there in detail -
Thanks for pointers.I was aware of initial FAQs, wasn't aware of updated posts in Dec '12.
Anyways, this was a used 250R ABS that I was checking. I have decided to let it go.
sukiwa is offline   Reply With Quote
Old 21st February 2013, 11:37   #175
BHPian
 
Srini76's Avatar
 
Join Date: Jul 2007
Location: Chennai, India
Posts: 114
Thanked: 68 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Lovely post I must say ! This has been instrumental in me enabling me decide go for a CBR 250r and I have given away my Custom RE 350 (Drago) and am set for the buy. Tri-color (ABS) it is for sure. One dilemma remains - The 2013 color scheme on the tri-color looks a more appealing and I am awaiting the same. Would any of you on this forum have any idea of when this new color scheme is being launched ? There have been various posts on the colors but no information per se on the arrival date.

Looking forward to any information to enable me book the ride !!

Thanks,

Srinivas
Srini76 is offline   Reply With Quote
Old 21st February 2013, 11:58   #176
Senior - BHPian
 
aargee's Avatar
 
Join Date: Jan 2010
Location: KATN
Posts: 4,352
Thanked: 1,360 Times
Infractions: 0/1 (5)
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Quote:
Originally Posted by Srini76 View Post
Would any of you...enable me book the ride !!
For now, there's no concrete news about the new color schemes to be launched in India; there're so many other news (rumors rather) floating around, especially after the launch of 150R & 250R naked versions, 500 F/X/R, about the possibility of these launches. So the color scheme news has almost become old now. But I do agree with you, the new HRC color scheme looks fabulous (even the red) than the current ones.

Tks for your kind words & glad my posts were of any help to you
aargee is offline   Reply With Quote
Old 17th March 2013, 19:02   #177
Senior - BHPian
 
naveenroy's Avatar
 
Join Date: May 2009
Location: Now in Bangalore
Posts: 1,295
Thanked: 636 Times
Default

Quote:
Originally Posted by aargee View Post
You'll need...
- 14mm socket & wrench or open ended wrench
Hello Aargee. Are you sure it is 14mm? I bought a socket wrench and a 14mm attachment for it but it doesn't fit the nut?
naveenroy is offline   Reply With Quote
Old 17th March 2013, 22:05   #178
BHPian
 
Join Date: Apr 2009
Location: .
Posts: 469
Thanked: 107 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Quote:
Originally Posted by n_aditya View Post
Clutchless upshifts are easier than downshifts (and less harmful to the GB and engine) since there will be lesser load on the gearbox and engine during upshifts. If the revvs are matched correctly (blipping the throttle) then you can seamlessly shift up without using the clutch.

how does one blip the throttle without the clutch pulled in? What am I missing here? please elaborate. I always had the habit of bliping the throttle during down shifts, but with the clutch pulled in.
YaeJay is offline   Reply With Quote
Old 18th March 2013, 08:46   #179
Senior - BHPian
 
aargee's Avatar
 
Join Date: Jan 2010
Location: KATN
Posts: 4,352
Thanked: 1,360 Times
Infractions: 0/1 (5)
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Quote:
Originally Posted by naveenroy View Post
Hello Aargee. Are you sure it is 14mm? I bought a socket wrench and a 14mm attachment for it but it doesn't fit the nut?
Yes I remember it's 14mm; let me check once again for you today evening; I hope what you bought is a socket-wrench type tool

Quote:
Originally Posted by YaeJay View Post
how does one blip the throttle without the clutch pulled in?
Avoids jerking
aargee is offline   Reply With Quote
Old 19th March 2013, 21:19   #180
BHPian
 
Join Date: Apr 2009
Location: .
Posts: 469
Thanked: 107 Times
Default Re: Honda CBR 250R : Answers to some commonly asked questions

Quote:
Originally Posted by aargee View Post
Yes I remember it's 14mm; let me check once again for you today evening; I hope what you bought is a socket-wrench type tool


Avoids jerking

Still does not answer the question! rev matching is more of a jeepy thing when we dint have the synchromesh. Always helps with bikes when you want to down shift with bikes, and upshifts if the gear box is shot. But, the blip happens with the clutch pulled in or pedal pushed in. My confusion was about 'blipping' when a gear is engaged.

rev matching, blipping, double clutch, gas in the clutch etc etc were all pretty common at one point of time.

Most modern bikes don't have false neutrals, most accept an up shift without the clutch.

In those days, it was not about jerking, but getting the gear engaged!
YaeJay is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Honda gives CBR 150R, CBR 250R new colours, decals for 2015 ashwin.terminat Motorbikes 23 31st October 2015 22:32
Honda recalls CBR 150R & CBR 250R for defective starter relay Added_flavor Motorbikes 0 15th August 2015 11:42
2014 Honda CBR 250R shares design with the recently unveiled CBR 300R JayPrashanth Motorbikes 6 25th October 2013 17:21
CBR 250R or CBR 600F2 sharad_kmc Superbikes & Imports 8 14th March 2013 21:04


All times are GMT +5.5. The time now is 20:58.

Copyright 2000 - 2016, Team-BHP.com
Proudly powered by E2E Networks