Re: Honda CBR 250R

Guys anyone with conti go tyres on Here? How long did it last? I'm on 140/60 rear tyre as my conti go kept puncturing like 4-5 times in a row which was really frustrating, the reason I put the smaller tyre cause it was a new one and free of charge.. Decided that I'll change both front and rear together, my bike is a 2014 model , I changed the rear tyre at 12000km its at 17000 km now, im changing the front and rear by the month end mostly to mrf as it seems more cost effective and tried and tested but heard it offers pathetic wet grip, correct me if I'm wrong... Wanted to go for Michelin but its out of my price bracket for the moment, I'd like to know if the slightly smaller tyre will affect my wheel shape or suspension or anything? I heard things like handling and cornering would affected which is a no brainer but anything else ?

Re: Honda CBR 250R


contigo's come in 140/70.. and they getting punctured back to back even tyre bracking etc is very normal.. its ok . its part of conti go's life as a tyre

what 140/60 are you using. using smaller size tyre will under gear your bike. reduce FE and top end. also you speedo reading for ODO and speed are no longer true.

change back to stock size 140/70 whenever you change tyre. MRF's are far better than continentals...

Re: Honda CBR 250R

I've heard I'll get better FE with smaller tyres... I think the speed on my odo is fine... I have run the tyres from 12000- to currently now 17000, plan to Change it before my next service at 21000km.. As u said about the odo giving wrong readings with a smaller tyre, will that change with back to the stock size? I want the stock size, but felt better to change both my tyres rather than changing one now and one later if ya get me and the tyre I got was brand new and was free...

Re: Honda CBR 250R

Let me explain as per my understanding.
Smaller tyre giving better FE is for narrow tyre and not the smaller in diameter. Narrow tyre will have lesser friction than fatter tyre, hence resulting in better FE.

Coming to speedometer reading, the meter is configured to show the speed for stock 140/70 rear tyre size. When this is reduced to 140/60(not sure contigo's are available in this size), the distance covered for one rotation of tyre will be less than that of stock tyre(in terms of few centimetres). As the speedometer is not adjusted for this new size, it will continue to show that the vehicle has travelled for so and so distance, where the actual distance travelled will be less.

The difference in the readings shown will be minimal, but on the longer run you will have huge difference. Say the meter has shown that you have travelled for 5000 kms, where as due to reduced tyre diameter the actual distance travelled will be like 4950.

When your are switching back to the stock rear tyre size, the speedo console will show you the proper readings.

Ram

Sent from my C1904 using xBhp Connect mobile app

Re: Honda CBR 250R

Thanks for the clarification.. And its a MRF rear tyre , that much of a small difference in speed or power is fine with me, but obviously I want to switch to the proper stock size, my front tyre is almost worn out soo will be changing it pretty soon , as far as fuel economy goes, if I had say 5/6 bars of fuel my bike can run for about 230-250 in cities , haven't had a proper test on the highways, still feel like im getting excellent economy, I keep my revs mostly below 5000-6000rpm, occasionally go past that.. But still I have to say I am very pleased with the mileage with the mixed riding I do , also another doubt will be rear wheel get deformed or something? Will my handling n cornering change?

Re: Honda CBR 250R

Only 230-250 km in 5-6 bars, thats the worst mileage heard from a cbr owner!!. With almost 5 bars you should be able to come close to 300 mark and with the revband always in 5-6k rpm you should atleast get 30-33kmpl in cities. For highways its a different story as you will always keep the revband near 7k or so and that will set you back by 30kmpl. These are my personal observations on the mileage perspective.

Cheers,
Sanjay

Re: Honda CBR 250R

Probably your CBR tyres may be "made in india" mechilin, which is of hard compund rubber, thats why the thread is intact. Now mechilin is not importing tyres from germany or thailand, which costs little more but hav great dry and wet grip. Try Pirelli if you want more grip at medium cost.

Re: Honda CBR 250R

Yesterday my bike stalled in traffic 3 times. The idle rpm dropped to 1300, and then suddenly stalled. Two times happened after the clutch was released, and once when the clutch was held in. Idling rpm went back up to 1500+ after I forcefully chopped the throttle after releasing it; no further stalls on that trip..

Re: Honda CBR 250R

No full tank I'll get 300+ km in the city I'm talking about 4-5 bars not 5-6.. Little more than half tank gives me 250km, a proper full tank 300-320km in city highways, 350-400+km.

Re: Honda CBR 250R

It's Made in Thailand tyres.

Sent from my SM-N750 using xBhp Connect mobile app

Re: Honda CBR 250R

At what speed please?

Re: Honda CBR 250R

I guess keeping it between 65-80 at 6th gear for the most part below 5000rpm, the run in period is crucial, I ran my bike at 3000-4000 rpm in the first 500 and 4000-5000 in the 2nd 500 with occasional bursts to 6000-7000rpm.I ride my bike in a very mixed manner, I keep fluctuating the speeds n rpm level, with reving done in a progressive manner.

Re: Honda CBR 250R

Last week I did a tank to tank test, keeping the rpm at 4k always. Tires at 38 psi. Got 45.8 kmpl only, unlike last year, where I got 49.7 kmpl. Only difference is, I removed the air filter cover, and changed the oil to 15w40 this year.

Re: Honda CBR 250R

Is the mileage quoted true? Or is it a typo? If it is true, I would like to know how? Have u made any changes to the mechanicals apart from what you have stated?

Sent from my SM-N750 using xBhp Connect mobile app

Re: Honda CBR 250R

Good, fantastic; no better way to break the engine!! Whoever taught you or wherever you learned that, please share it to us & we can enlighten ourselves too!!