Hi friends

Off late I've been facing this strange issue with the check engine light of my 5 year old R15 S

CEL comes up on the cluster while riding, stays lit for 3-4 seconds and goes off on its own. Dug up some old threads on bike forums and found that the manner in which this light flashes (for eg, 4 slow flashes and 6 fast flashes means error code 46) can be used to pinpoint the issue. But there are no flashes in my case.

I got it scanned at Yamaha ASC but no error codes were found. Chaps there said that their tool will read fault codes only when warning shows on the cluster which I feel strange. Bike was kept idle for 30 mins just to be double sure.

Today on a 100 km round trip, the CEL came up 3 times (in the aforesaid manner) with 15-20 minute intervals. There are absolutely no issues before, during or after the light comes up on the cluster. No change in acceleration, or fueling/throttle response.

Bike was serviced recently (1000 kms/2 months back), starts normally, drives well and has been reliable for the most part.

What could be the issue? Have you ever faced something like this?

Any advice would be appreciated. Thanks.

I need a help. I am about to shift to Bangalore from Kolkata. I want to take my bike with me. What are the formalities I need to do here before I take it there. Also, once I reach there, do I need to take care of formalities there as well??

This can be more sinister than it actually is. First off, the bend that you observed in the front can in fact be attributed to the high speed wobbling and the fact that if you have not replaced oil on both the forks and just one fork can be a suspect. The upsize of tire on the front directly affects the front end feel and yes it does amplify even the minute undulations, have observed this on the FZ and the R15. The ride feels like an ECG wave. The uneven upsize both at the front and rear, coupled with too high a tire pressure can all be a prime suspect. Start off by going a few PSI down say 28 front and 29 rear and see if it helps, this way, the tire flexes a bit to absorb the bumps.

Bias ply aren't great at handling undulations, they transfer all the vibrations and bump feedback to the suspension and in turn to the rider, hence their cushioning effect whatsoever isn't that great.

Try to level your front forks, both filled with new and the right ML for the both the forks, and with reduced tire pressure, I'd recommend you to go for a drive and see how it feels.

That's all I can think of at this time.

Good luck.

Hope it helps.

Cheers!
VJ

So I need some guidance with my suspension.
lately I have been riding on roads that are not perfectly levelled. I mean they are "good" roads from a cruiser/ car perspective, but they are lumpy and have uneven joints. I have been experiencing a very bumpy ride dure to this.
Yesterday I did some 160+ km on some really good roads and I noticed that anytime I was riding on anything less than a well levelled asphalt road, the bike was jumping around a lot. It felt like i was literally riding a horse. The rear wheel was making me bounce on the seat constantly and the handlebars were shaking a lot too. Overall it has become very uncomfortable to ride due to this especially at high speeds. I wanna know is this a sign my rear suspension is busted?

To give a brief history, I have had one of my front fork replaced as it was dented and leaking oil. So they replaced the whole pipe with oil and spring for just one pipe in the front.
Secondly, I have had to upsize the tyres. The front tyre was not available in the size OEM recommends, so i had to upsize that, and just so that the rear and the front tyre heights remain proportionate, I upsized the rear tyre too. So now I have 100/80 front and 140/70 (non radial) rear. Do you think the added weight of the rear tyre is causing the suspension to jump harder?
Any suggestions how do I overcome this?

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

Nothing will happen. Your bike will run absolutely fine. The main thing in a fuel to be noted is the calorific value, which if not present, the engine won't fire up or cause missing. AFAIK all Indian bunks have 91 RON as standard. Shell V Power isn't high octane petrol, AFAIK, it's the same 91 fuel with added additives which helps keep the combustion chamber clean, i.e. detergents and additives, that's about it.

Cheers!
VJ

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

I Have Been Using Shell Regular Unleaded Fuel, I Regularly Do Mumbai To Madurai Once In 2 Month.

Now I'm In Trichy Here Down South In Tamilnadu There Are No Much Shell Stations, I Was Wondering What If I Full Tank With Regular IOC Normal Petrol To Shell V Power Which Is There Half Tank, What Will Happen Or What Will Be The Results.

Also Please Do Tell Me What RON Is Regular IOC Normal Petrol.

Thanks.

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

What you've used is a high octane fuel, which is good and bad. Too much high octane fuel will produce a lot of heat, especially for not so high compression engines. There's nothing wrong in using this fuel, it won't return a drastic improvement in performance and why waste money when the bike is designed to run on normal octane 91 fuel. Use it very sparingly and I recommend it when going for more than 500 KM trip. But for everyday ride and commutes, stick to CoCo operated bunks with regular gasoline.

Cheers!
VJ

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

Yesterday I happened to fill shell branded petrol for the first time in my bike and it costs 98 per litre [emoji15][emoji15][emoji15]. Will it affect the engine of my bike ??? Usually I fill Bharat petroleum petrol in my bike ..

Re: Yamaha YZF- R15 S Owners Reviews and Experiences


Absolutely. Everyone's enjoying their little R.
Vijay, would love to hear your slipper clutch modification and do give us a detailed write up with images if feasible. As I always say, this is a bike for a life time.

Cheers!
VJ

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

No activity in this thread. Seems like people moved to different bikes or R15 is not giving any trouble. Time to write my slipper clutch modification which is a long term due 28k km on v3 clutch. My bike is doing healthy nearing 90k on the odo. Lots of spares purchased for 90k service such as fork springs, coolant, filters, spark plug. Iridum plug is now 80k completed. Seriously there is no replacement for this bike.

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

Thank you for the help !

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

The fact that your motorcycle fired up and you were able to ride itself means your bike is in good shape, considering the weeks the bike not being touched. So, make sure, every week, you fire up the bike, go for small ride, say a km or two KMS which is better than letting it idle. If you can't ride, let it idle for 10 mins, mild revs say around 6k twice and then let it idle for a couple of mins and stop, this is the safe and best way, and nothing will happen to the bike. If the bike is uncovered and parked in road, with dusty conditions, it's better to just oil to chain with engine oil mildly and leave it at that, so that it doesn't rust. But, pretty much your bike is taking the lock down good, so nothing to worry.

Cheers!
VJ

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

Hi!!! It’s been three weeks I have kept my bike r15s due to lock down . After seeing some posts in fb , I saw DIY methods to maintain bikes during lockdown - this what I did is ... today I switched on the bike , and kept it for idling just for 5 minutes , then took for one small round and then stopped in the parking area and kept it switched on idling for 5 minutes , then switched off. Bike was working good !!

I have doubts
1. The bike was still in the parking area for 3 weeks and today I used the bike . Will the engine have problem or get damaged if I use after the lockdown gets over

2. Will the battery last long ! In case if it’s failure , I ll have to push the bike 1.5 km to the service centre . The starting of the bike mainly depends on the battery .

3. The chain was lubed three weeks back and after that I dint use the bike . Should the chain be lubed again ?


PS : this bike completed one year !
Please help !

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

Hi B7ACKTHORN, Two of the wires were melted together in right front panel location and shorted the circuit. I have checked RR output and it is within the limits while idling. Now what caused the wire meltdown so that i can take precautionary action to avoid this future.

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Thanks ashwinprakas.

Re: Yamaha YZF- R15 S Owners Reviews and Experiences

Yup, no problem. I didn't help in anything really SM, you takes all the effort, and we just pushes it, recommending to explore this and that. Nevertheless, keep your observations posted, I'd be more interested to know the outcome of this one.

Cheers!
VJ