Announcement

**nand15** · 07-24-2013, 08:59 PM

Re: Yamaha YZF-R15

Originally posted by 883 View Post

mine snapped at 12000 kms next at 15000 kms as it was bosch and again the original one at 24000km
is it normal for all r15s

Surprising , I am now at 50416km on the ODO and no issues with the clutch cable as such .

On other news , just got the bike back after 20 days at the service center for a clutch reset and a bore change as they figured out that the RC BB had too much clearance . Now back on the stock bore . Bike feels a lot tighter now , not as free revving as it was on the RC Big Bore .

Attaching pics of the RC Bore and Piston and ofcourse my pocket dent for the work .

**abhimanyu31** · 07-24-2013, 10:30 PM

Re: Yamaha YZF-R15

Originally posted by nand15 View Post

Surprising , I am now at 50416km....

On other news , just got the bike back after 20 days at the service center for a clutch reset and a bore change as they figured out that the RC BB had too much clearance . Now back on the stock bore .

How much did your bike run on the big bore? Did they tell you what was clearance value? Did they do a compression test? Will be very interested in knowing these figures if available.

Sent from my iPad using Tapatalk HD

**nand15** · 07-24-2013, 11:29 PM

Re: Yamaha YZF-R15

Originally posted by abhimanyu31 View Post

How much did your bike run on the big bore? Did they tell you what was clearance value? Did they do a compression test? Will be very interested in knowing these figures if available.

Sent from my iPad using Tapatalk HD

The bike has done about 32000 km on the Big Bore . I wasn't smart enough to ask them if they did a compression test . But what he showed me with the bore was that when he placed the piston on top , it just fell straight through . whereas on the stock bore it held it's place and had to be pushed through the bore . He said that it was a sign that the bore has gone bust . I hope I am depicting it correctly .

**883** · 07-25-2013, 12:41 AM

Re: Yamaha YZF-R15

Originally posted by ZMAtic View Post

Got down into parking today morning to buy milk and found out that my R15 was not in parking. When i raised alarm, came to know there are multiple incidents in nearby society.

After much hoopla came to know my bike was parked some 500 meters away from society, on main road. Surprisingly, the handle was unlocked, and both front and back wheels missing.

Both Rims with Disc plates attached, both new tyres, and the Sprocket Driven... Same was the case with some other bikes. A good 20K of loss which money i wanted to invest in gears.

PLEASE guys make sure your steeds are safely parked and protected. Must be some gang operating around. BTW i live in Dhanori, Pune.

why the wheels only
any thing else missing ?

----consecutive posts auto-merged-----

**nand15** · 07-25-2013, 10:16 AM

Re: Yamaha YZF-R15

Guys , had a new issue crop up just now , was riding the bike sedately at around 40kmph . Came across a trucker I wanted to overtake ... shifted down and accelerated only for the bike to choke for a second and the engine and the overhearing light flashed on the display and disapeared . Didn't occur after that ...

Sent from my GT-N7100 using xBhp Connect mobile app

**883** · 07-25-2013, 05:58 PM

Re: Yamaha YZF-R15

just got my bike completely serviced and got a new clutch cable and the bike feels like new again
but one thing i want to warn u all yamaha bikers plz never bye ur bike or go for servicing at east zone yamaha at mintopark its worst than hell

**Juris** · 07-26-2013, 04:45 AM

Re: Yamaha YZF-R15

Biker's SOS...
Since July 2011, I have R15 with Race Concepts Big bore kit, Free flow exhaust, ported head, camshaft and other goodies(stock ECU)... With this setup I have done 26K kms... The problem is coolant leaking into crankshaft and is getting mixed with engine oil. For last 10 days, we have thoroughly checked radiator and reservoir for any leaks and we didn't find any... Also, changed the head gasket twice(thinking it was leaking)... This time, we used rubber based sealant to ensure proper seating... But after all the hard work(full engine overhaul two times in last 10 days), coolant is getting mixed with engine oil.... Now head gasket leaking is ruled out... What could be the issue...

I have 6000 Kms ride(Hyd-Leh-Hyd) starting Aug 9th... I want to fix this issue for my dream ride... Plz help...

**abhimanyu31** · 07-26-2013, 05:01 AM

Re: Yamaha YZF-R15

^^^ couple things you need to check; 1) is there any sign of sweepage from the bottom gasket? 2) If yes, then check the cylinder casing for a hairline crack.

Sent from my iPad using Tapatalk HD

**883** · 07-26-2013, 10:24 AM

Re: Yamaha YZF-R15

juri i think their is a hair line crack in ur cylinder casing abhi might be right

**Juris** · 07-26-2013, 12:20 PM

Re: Yamaha YZF-R15

Originally posted by abhimanyu31 View Post

^^^ couple things you need to check; 1) is there any sign of sweepage from the bottom gasket? 2) If yes, then check the cylinder casing for a hairline crack.

Sent from my iPad using Tapatalk HD

Last time I had inspected cylinder block and it seemed fine. I all inspect head and cylinder block again. As of now replacing the water pump and checking that.

Originally posted by 883 View Post

juri i think their is a hair line crack in ur cylinder casing abhi might be right

**stefanm** · 07-26-2013, 12:59 PM

Re: Yamaha YZF-R15

^^Most probably the water pump gasket/O Rings these can get damaged or debris can get stuck whilst the pump is open.

**Juris** · 07-26-2013, 01:54 PM

Re: Yamaha YZF-R15

Originally posted by stefanm View Post

^^Most probably the water pump gasket/O Rings these can get damaged or debris can get stuck whilst the pump is open.

Hope this is the issue. Peculiar stuff is that it takes 100-150 kms of testing to know whether actually coolant is eaten up and getting mixed with oil. On last two occasions tested for 20 kms and it was all well. Tested for 160 kms and all dreams came crashing down

**abhimanyu31** · 07-26-2013, 02:25 PM

Re: Yamaha YZF-R15

Originally posted by stefanm View Post

^^Most probably the water pump gasket/O Rings these can get damaged or debris can get stuck whilst the pump is open.

Originally posted by Juris View Post

Hope this is the issue. Peculiar stuff is that it takes 100-150 kms of testing to know whether actually coolant is eaten up and getting mixed with oil. On last two occasions tested for 20 kms and it was all well. Tested for 160 kms and all dreams came crashing down

Yes, as Stefanm suggested it could be the water pump gasket or O rings. The fact that it is taking so long for you find the leakage is because the leak is very, very small and is probably only coming into play once the engine heats up. A hairline crack will not leak while the metal is cold. It only starts opening up once the metal heats up and the metal starts to distort at the crack line. The same could also be true in some cases with the water pump gasket and O rings. While the metal is cold the gasket/ O ring seating could be adequate. However, once the engine heats up the gasket/ O ring could distort, thereby, leaking coolant.

**Juris** · 07-26-2013, 02:55 PM

Re: Yamaha YZF-R15

Originally posted by abhimanyu31 View Post

Yes, as Stefanm suggested it could be the water pump gasket or O rings. The fact that it is taking so long for you find the leakage is because the leak is very, very small and is probably only coming into play once the engine heats up. A hairline crack will not leak while the metal is cold. It only starts opening up once the metal heats up and the metal starts to distort at the crack line. The same could also be true in some cases with the water pump gasket and O rings. While the metal is cold the gasket/ O ring seating could be adequate. However, once the engine heats up the gasket/ O ring could distort, thereby, leaking coolant.

Well that's the action plan. Change water pump. If that doesn't help, switch to stock bore and head.

**Juris** · 07-27-2013, 10:22 PM

Re: Yamaha YZF-R15

So the lead changing the waterpump didn't help. Soon after 60 kms of testing, we found the froth after opening the water pump.

So the two probable issues- Busted Gasket and Faulty Waterpump(O rings, Gaskets, oil seal, impeller) didn't help.

Immediate plan of action. 1) Take the head to CNC machine for flat bed setting and test.
2) Switch to stock cylinder. This will be for cracked coolant cylinder jacket. And test.
3) Change the head and test.

Any pointers guys.

Announcement

Yamaha YZF-R15

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment