Announcement

**Raminder_Singh** · 11-08-2012, 07:30 PM

Thanks for writing back Paul. Yes, it was 60 a few months ago when I had not gone for the trip to Kasauli. But after coming back from there, bike only goes till 60-65 kms before hitting reserve in the same 1.5 ltrs of fuel which is just ~45 kmpl and this is bothering me.
I use the same method that you have mentioned i.e. (Difference in kms (reserve to reserve)/ Fuel filled in litres)
I have also tried all the fuel stations like Indian Oil, Bharat Petroleum, HP etc but the same result.

**Honda_CBF** · 11-12-2012, 07:45 PM

Sorry for coming back late. I feel you are in different riding conditions now than before. Or something happened from the ride, to-from kasauli. I'd suggest, just ride it like that for sometime, i mean for next 1000 or 2000kms, don't stick to same rpm or speed keep it varying (like run-in) but you can rev it freely. If engine has glazed, then it should free it a little. Additionally you can run with any petrol additive (which cleans engine top end & fueling system) and a little costlier alternative to petrol additive it branded fuels. And I have also seen few vehicles getting better with tappet adjustment. Just make sure, work done is top notch.

**Raminder_Singh** · 11-12-2012, 09:23 PM

@Honda_CBF: Thanks buddy for writing back. As per pavanchirmade's advice, I checked the tire movement and the front wheel was not moving freely. The disk pads were rubbing against the disk. After getting that rectified, I got mileage of 53 this time so that helped. But I am still not getting 60+ which I used to get earlier. I will now try your idea and post the update. By the way, for how long should I use premium fuel (will use XtraPremium or Speed as it is easily available) ? I don't want to use it for lifetime as it is very expensive

. Also, I am planning a trip again in the end of November to Himachal on my Stunner and don't know how it is going to perform this time. Earlier, on the Kasauli trip, I got mileage of 55 which is quite impressive as the RPM keeps changing on hilly areas.

**Honda_CBF** · 11-13-2012, 07:12 PM

Originally posted by Raminder_Singh View Post

@Honda_CBF: Thanks buddy for writing back. As per pavanchirmade's advice, I checked the tire movement and the front wheel was not moving freely. The disk pads were rubbing against the disk. After getting that rectified, I got mileage of 53 this time so that helped. But I am still not getting 60 which I used to get earlier. I will now try your idea and post the update. By the way, for how long should I use premium fuel (will use XtraPremium or Speed as it is easily available) ? I don't want to use it for lifetime as it is very expensive

. Also, I am planning a trip again in the end of November to Himachal on my Stunner and don't know how it is going to perform this time. Earlier, on the Kasauli trip, I got mileage of 55 which is quite impressive as the RPM keeps changing on hilly areas.

premium fuels are always available within city limits, (my preference is xtrapremium, slight difference is noticeable) just be sure of authenticity of fueling stations. But they are ridiculously expensive these days that's why I also stated about off shelf petrol additives, which is cheaper. Use them for around a 1000kms. [Note: there won't be any instant results and stay away from octain boosters, they are just waste of money] . Also, use 20w40 oil for year long, except in winters where I'd recommend 10w40. 10w30 is only suitable if one's riding for very low distances.

**Raminder_Singh** · 11-14-2012, 12:23 AM

Originally posted by Honda_CBF View Post

premium fuels are always available within city limits, (my preference is xtrapremium, slight difference is noticeable) just be sure of authenticity of fueling stations. But they are ridiculously expensive these days that's why I also stated about off shelf petrol additives, which is cheaper. Use them for around a 1000kms. [Note: there won't be any instant results and stay away from octain boosters, they are just waste of money] . Also, use 20w40 oil for year long, except in winters where I'd recommend 10w40. 10w30 is only suitable if one's riding for very low distances.

Thanks for your advice. I will now start use XtraPremium for my Stunner for around 1000 kms and post the results. Right now, I am using Castrol Activ 4T 20w40 but didn't like it. The bike becomes very harsh after 50 kmph. I used Honda engine oil 10w30 when went on Kasauli trip. But now I have purchased Petronas Sprinta 4T 4000 and going to put it soon. Do you think I should take my bike for another trip which should be around 1200 Kms that I am planning by the end of November? I don't think there should be any problem but just want to know what you think

Thanks buddy and Happy Diwali!!!

**Honda_CBF** · 11-14-2012, 02:36 PM

You can go for the ride mate. No problem. Just use good oils. Haven't used the petronas but reviews are positive. But don't use a oil which has got lower viscousity than 10w40. Btw, my personal feeling is like castrol, Honda oem are crap. take some rest between riding hours while on long road trips (10mins pretty enough) helps you get refresh/warm up and cools your bike down. Also you can overgear your bike for touring needs (if you haven't done) helps shed some stress, for you and your bike too.. Happy belated diwali

**Raminder_Singh** · 11-15-2012, 01:27 AM

Originally posted by Honda_CBF View Post

You can go for the ride mate. No problem. Just use good oils. Haven't used the petronas but reviews are positive. But don't use a oil which has got lower viscousity than 10w40. Btw, my personal feeling is like castrol, Honda oem are crap. take some rest between riding hours while on long road trips (10mins pretty enough) helps you get refresh/warm up and cools your bike down. Also you can overgear your bike for touring needs (if you haven't done) helps shed some stress, for you and your bike too.. Happy belated diwali

Thanks buddy. I have also noticed an issue with the self starter. When I use the self starter, the bike starts but the RPM is so low and engine shuts off within 2-3 seconds. I then have to use throttle with the self starter and this happens everytime now. Earlier, this wasn't so. The bike used to start just after one push of self starter and this also happened after coming back from Kasauli trip. This Kasauli trip has turned out to be a complete head ache for me now

. I don't know if this is something related.

**paul.1911** · 11-15-2012, 01:49 AM

Yaar just increase the ideal rpm thats all

increase it when your engine is warm, check the owners manual for ideal rpm.

**Honda_CBF** · 11-16-2012, 12:41 AM

Originally posted by Raminder_Singh View Post

Thanks buddy. I have also noticed an issue with the self starter. When I use the self starter, the bike starts but the RPM is so low and engine shuts off within 2-3 seconds. I then have to use throttle with the self starter and this happens everytime now. Earlier, this wasn't so. The bike used to start just after one push of self starter and this also happened after coming back from Kasauli trip. This Kasauli trip has turned out to be a complete head ache for me now

. I don't know if this is something related.

the issue is not with the self starter. Its fuel or the fueling itself. This kind of problem can happen if the AFR is too rich (if you are facing this issue all the time i.e. Hot/cold/warm engine) which can also translate to your lower mileage. By the way, do you know at what position that AFR screw is at? Stunner likes it between 3.75 to 4 full (360 degree turn) from stop. P.S. if the choke cable is routed in a way which can create slight tension in it then also your 'low rpm start-up problem' can happen. Actually This choke cable was the reason for me cleaning its carb recently.

**paul.1911** · 11-16-2012, 01:05 AM

Originally posted by Honda_CBF View Post

the issue is not with the self starter. Its fuel or the fueling itself. This kind of problem can happen if the AFR is too rich (if you are facing this issue all the time i.e. Hot/cold/warm engine) which can also translate to your lower mileage. By the way, do you know at what position that AFR screw is at? Stunner likes it between 3.75 to 4 full (360 degree turn) from stop. P.S. if the choke cable is routed in a way which can create slight tension in it then also your 'low rpm start-up problem' can happen. Actually This choke cable was the reason for me cleaning its carb recently.

He already stated that spark plug color is brownish now. That means AFR is correct.
He got adjusted the AFR screw by mechanic, and if mechanic have adjusted then he (mech) for sure have fiddle with ideal screw. And he set the ideal to low and causing this problem. Actually the main cause is this.

And because he is seeing Kasauli from a bad side because of getting lesser mileage, it let him think that starting problem is also caused from Kasauli. But actually it is after going to mechanic after coming from Kasauli.
This is what i guess.

In our HH owner book, it has written that slight acceleration is required to start a bike. If acceleration is not required that means ideal screw is doing that work.

**Honda_CBF** · 11-16-2012, 01:42 AM

Originally posted by paul.1911 View Post

He already stated that spark plug color is brownish now. That means AFR is correct. He got adjusted the AFR screw by mechanic, and if mechanic have adjusted then he (mech) for sure have fiddle with ideal screw. And he set the ideal to low and causing this problem. Actually the main cause is this.And because he is seeing Kasauli from a bad side because of getting lesser mileage, it let him think that starting problem is also caused from Kasauli. But actually it is after going to mechanic after coming from Kasauli.This is what i guess.In our HH owner book, it has written that slight acceleration is required to start a bike. If acceleration is not required that means ideal screw is doing that work.

well, true. But whatever I stated was form my little 2.5yrs experience with stunner. And I really think that problem can be the choke cable (been there done that

) .Even my spark plug showed good tan/brownish color but engine used to die when at idle. Also if started (without throttle) rpm used to be pathetically low (400-500rpm) and slowly comes up to 1000-1100rpm after 3-4 sec. Which was not the case earlier (also now, as its been corrected

). Btw, also check post no. 9 where this starting issue is stated.

**Raminder_Singh** · 11-17-2012, 09:25 PM

@paul.1911: Thanks buddy for writing back. Actually, this doesn't seem to be a problem with idle screw. When I start the vehicle, the RPM is low and it stays low for a couple of seconds. After that, either the engine dies or the RPM stays that low and I have to increase the RPM manually. If this was a case with idle screw, RPM should always remain slow. In my case, it just happens when I start the vehicle.

@Honda_CBF: I got the choke cable changed a few weeks back as the previous cable was faulty. I think the mechanic who changed the choke cable didn't do it properly. I have checked it myself and the choke cable seems to be routed properly but I will get it checked from a mechanic. Also, I am not sure about the position of the AFR as it was set by Honda ASC guys but the carb setting seems to be correct as bike is idling smoothly and spark plug color is brown. I will now get the choke cable checked and let you know.
Thanks buddy!

**Honda_CBF** · 11-18-2012, 01:25 PM

http://www.xbhp.com/talkies/attachme...g-dsc03378.jpg The link shows choke cable routed wrong (the longer) way. This was the my case. The choke cable's original route was from behind the carb. Hope it helps

**Raminder_Singh** · 11-19-2012, 02:59 AM

Originally posted by Honda_CBF View Post

http://www.xbhp.com/talkies/attachme...g-dsc03378.jpg The link shows choke cable routed wrong (the longer) way. This was the my case. The choke cable's original route was from behind the carb. Hope it helps

Thanks buddy for the pic. I have checked but the choke cable is routed correctly i.e. from behind the carb but I will still get it checked from an experienced mech.

**Ram_1791** · 12-01-2012, 12:46 PM

You might want to adjust your sparkplug gap.. A little more than 1.2mm (although not specified in manual) for leaner mixture and about 0.8mm for richer mixtures. If you are using a after market performance filter change the diaphragm in your carb. If you are on lean mixture and sparkplug gap is about .8mm you will see rpm building up without going above 25kmph till 7000 rpm in 1st gear. Something which I've experienced. Correct me if I am wrong.

Use a 15w50 engine oil.

Announcement

Low mileage issue with Honda CBF Stunner

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment