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**ken cool** · 07-20-2010, 09:57 AM

Strange!

Approved

**Sarvajit** · 07-20-2010, 12:34 PM

First step: Get the idle speed checked with an engine rpm meter (a small piece like a pendrive) at the SVC. They will connect 2 wires also. This will help to know exactly what rpm the engine is idling at.

**satyenpoojary** · 07-20-2010, 12:39 PM

Do you have adequate engine oil?
What fuel do you use?
Is there smoke coming from the silencer, if so what colour?
If not, then rev the bike hard and keep your hand near the exhaust to trap the smoke... is the residue oily, watery?

**tibby** · 07-20-2010, 01:00 PM

The idling on your bike is way too low IMO, & is the reason why the engine is dying. My bike's idling had also come down to 1100 RPM once, & I had some issues with the engine seeming to die then.

You mentioned that you had adjusted the idling on your bike. Did you do it on a warm engine, or cold. It SHOULD be done on a warm engine.
Also, once you set the idling right (on a warm engine), you need to rev the bike a bit (in neutral), & re-adjust idling if the RPM falls below what you had just set.
The idling RPM as per the manual is 1300-1500 RPM. I would recommend an idling of 1300 or 1400. Higher the idling RPM, higher is the fuel consumption (during idling).

**ashaq54** · 07-20-2010, 04:08 PM

here goes my replies:

Do you have adequate engine oil? Yes, I do.
What fuel do you use? Octane available in Bangladeshi market.
Is there smoke coming from the silencer, if so what colour? nop, couldn't notice any smoke.
If not, then rev the bike hard and keep your hand near the exhaust to trap the smoke... is the residue oily, watery? will check that.
Did you do it on a warm engine, or cold? i did the adjustment on a warm engine. for the time being it ran ok. the next morning the problem prevailed. for the first few minutes after firing-up, the idle speed went up to 1500, then started fluctuating around 1100-1200RPM. and the RPM needle is not steady at all, goes up and down.

however, if i keep the engine running for 8-10 minutes and rev up the engine a bit, then this stalling stops. i think, it's the first few minutes when the engine is not fully warmed-up, therefore, idling speed is fluctuating and engine is stalling.

**zayn** · 07-20-2010, 04:32 PM

Originally posted by ashaq54 View Post

here goes my replies:

Do you have adequate engine oil? Yes, I do.
What fuel do you use? Octane available in Bangladeshi market.
Is there smoke coming from the silencer, if so what colour? nop, couldn't notice any smoke.
If not, then rev the bike hard and keep your hand near the exhaust to trap the smoke... is the residue oily, watery? will check that.
Did you do it on a warm engine, or cold? i did the adjustment on a warm engine. for the time being it ran ok. the next morning the problem prevailed. for the first few minutes after firing-up, the idle speed went up to 1500, then started fluctuating around 1100-1200RPM. and the RPM needle is not steady at all, goes up and down.

however, if i keep the engine running for 8-10 minutes and rev up the engine a bit, then this stalling stops. i think, it's the first few minutes when the engine is not fully warmed-up, therefore, idling speed is fluctuating and engine is stalling.

It may be Auto choke.Get it check your R15 Electrical wiring and Battery fuse too.In Authorized Workshop..

**jd666** · 07-20-2010, 11:58 PM

i would suggest the following -

- get tappets adjusted/valve clearance
- check air filter
- check fuel injector for clogging ( best done by using a suitable injector cleaner with petrol )

**ashaq54** · 07-21-2010, 01:48 PM

went to a workshop. the mechanic says, it's happening due to some low quality fuel. the spark plug had brownish shade on it as well which i believe due to the poor quality fuel. as per the mechanic's view, this problem will be solved once i replenish the fuel tank with better octane.

what do you guyz think..?? can that be a cause...??

**Ganeshan** · 07-22-2010, 03:50 AM

True that the whole thing sounds really strange! Poor fuel, in that it is contaminated by dirt or water, can cause the engine to idle erratically or stall, so I'd go by what your mechanic's advice. Although I can't see how low octane fuel would cause such symptoms. Could it be that your spark plug is failing, or has the wrong heat rating? Would love to hear what the problem was when you've cracked it... Best of luck!

**neon** · 07-22-2010, 03:58 AM

Possibly water in the tank or dirty carburetor (if R15 has1) & Air Filter Cleanup required.

When was the last time she took a bath (Washing)

?

**ashaq54** · 07-22-2010, 02:38 PM

i still got 2-3 liters of old fuel in the tank. the mechanic says, this problem might persist till all the old fuel is exhausted and it surely does persist. as explained earlier, it happens only when i deccelerate from high-speed to lower one and downshift, all of a sudden, the RPM marks goes straight back to zero and engine dies of..no jerking or noise what so ever. let's see what happens when i get the new & better fuel. the good thing is, bike's pick-up, acceleration or top speed..all are like the same..it's only the slowing and down-shifting times when the engine suddenly dies out.

any insight from you guyz...??

**GOU** · 07-22-2010, 04:04 PM

Originally posted by ashaq54 View Post

went to a workshop. the mechanic says, it's happening due to some low quality fuel. the spark plug had brownish shade on it as well which i believe due to the poor quality fuel. as per the mechanic's view, this problem will be solved once i replenish the fuel tank with better octane.

what do you guyz think..?? can that be a cause...??

I faced this type of situation in my old HH Passion once (now sold). Fuel tank had water in it. Don't know how it got there - this was after the servicing, so I believed during hte servicing water went inside. Engine would stall frequently when it would run in reserve. I guess that would be because water being heavier would settle in the bottom and would come to use during reserve.

Once it stalled completely on Sunday and I went to nearest local mechanic, who found this problem. Cleaned carburater, separated water out of fuel and bike ran without any problem after that.

So I think the low quality fuel might cause this situation, though I find it hard to believe the fuel quality to be so low.

Originally posted by neon View Post

Possibly water in the tank or dirty carburetor (if R15 has1) & Air Filter Cleanup required.

When was the last time she took a bath (Washing)

?

R15 does not have a carburator. Did this problem occured after you did servicing or washed it?

**Ganeshan** · 07-22-2010, 04:11 PM

As this happens when you pull the clutch in, and the rev counter drops to zero, I'm wondering if your problem is not rather an electronic one, such as a faulty kill switch or sensor. It's worth checking that your clutch and side stand switches work properly. Make sure as well that your clutch cable is well adjusted and that it fully releases the clutch.

**ashaq54** · 07-23-2010, 07:17 AM

yeah, the problem started occuring after a servicing and wash at my mechanic's place where he had adjusted my gear lever position a bit down, so that upshifts can be smoother, which it did. however, from last evening the problem has increased even more. previously, used to hear a chunky sound while upshifting, which i don't hear anymore, upshifting has become a bit softer. that is not a big deal i guess, however, while deccelerating from 90 to say, 20 or 10, pulling the clutch in and downshifting, the engine dies off. this has happened several times during this morning's run.

at any speed, when the bike is running, if i pull-in the clutch fully, the engine is supposed to keep on running with the RPM staying just at the idle mark, isn't it...??

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R15 Engine Stalling

R15 Engine Stalling

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