Cool,How much for the oil and hows the bike now?

Y'de Changed my ZMR oil to Mobil1 4t 10W40 fully synthetic.(made specially for four stroke bikes, meets JASO MA and API SG)
Previously used 20W40 mineral, done 10k kms, fed up with noise and heat, so switched to FS.
Today went for a long ride for 435kms. Following things observed with the new oil..

* Engine noise is somewhat low now.. Much more refined noise, previously engine was very noisy..
* Engine is revving comparatively freely..
* Could find the Neutral on one go with about 90% accuracy..
* Almost negligible decreased heat emission from the engine, even after 2 hours crankcase still hot!
* Did an observation, after I rode for about 100kms without stopping in varying speed between 40-75kmph, then stoped the bike, opened the engine oil dipstick, managed to get few drops of oil on to my palm, suprisingly engine oil wasn't heated up much, it was like a little hot (may be about 50-60 celcius).. But the outer casing of the enging was scrouchingly hot, could not even bring my finger close to it..
* Silencer however cooled down very fast within 5 mins or so.. But the engine casing, NO!
* Exaust fume wasn't that hot, it was cooler than the enging case, I could keep my hand in the way of the exaust fume for couple of mins..
* Vibrations has reduced, but in and around resonance freequency(between 3.5 - 4.5k RPM) vibrations has increased, a LOT and engine felt very stressed! Before and after almost zero vibes..

So I'm in kind of a confusion that I should continue to use this oil or not.. Is this the way an engine oil acts?

I did above ride under very hot sun, in Dry zone, I guess the temp should have been around 40Celcius, so bike has runned in somewhat harsh environment as well. Total ride took me about 8 hours too..

Please share some thoughts..

Got the oil for 210/litre .Due to weekend,Haven't ridden my bike(me kinda fat lazy guy)Will ride to office tomorrow and post the differences.

please help me out here
I have one question ... the front brake caliper is not tight i.e it can be moved up with the hand slightly but the rear caliper is tight . Is it normal ??? the svc guys says so

PS: Today i completed 1 year with my ZMR

If you ride a 10 base wt oil like 10w40/10w30 , be it mineral or synthetic, for 50kms+ continuously at near 40C ambient temp , well, you'll have an pretty heated engine . It's normal under such circumstances . If you do it once in a while .. no harm in it at all . If you ride like that daily, a 15w50/20w50 oil would better suit you . Do a spit test on the engine casing and keep an eye on the oil levels now and then and you'll be fine .

Congrats! for your ZMR 1st B'day

As for caliper; don't think they can be moved by hand...i will check mine...but since during cleaning the bike i haven't notice such thing...

Its supposed to move. Since its called floating caliper.

ZMR Serviced @ 20000 kms

Had my ZMR serviced yesterday for FOURTEENTH time @ 19516 kms.

Changed the following set of things.

1. Ball Racer Changed
2. Accelerator Cables (A&B) Changed
3. Clutch Cable Changed
4. Chain & Sprocket Changed
5. Clutch Plate Changed
6. Front Left Indicator Glass (Broken earlier)
7. Oil Filter Change & Tank Clean
8. Fork Oil Changed
9. Engine Oil Changed to 10W30 Synthetic

Bike feel has suddenly changed...

so there is no fault in caliper i guess ...
only the front caliper moves little bit but the rear caliper does not move

jumping to my second problem ...
the handlebar is vibrating a lot at speed of 90+km/hr . what could be the problem ?

Thanks for your wishes

whenever you check the caliper please let me know

Can you please give split figures of the spares u bought and total service cost ?

10w30 Synthetic - CBR250's ?

Absolutely, but my concern was why the temperature of the oil in the engine is not as much as the engine casing itself?? I thought that the oil acts as a medium and transfers heat generated by the internals to the outer casing thereby help to maintain a less hotter internal parts.. So my guess was the oil should heated up as close as the engine casing, where in my case it was'nt(as per my observation mentioned)!!

And also the exaust fume was also not that hot as I explained in my previous post. So I couldn't relate these two scenarios!

Either oil acted supremely as a medium to heat and very effectively transferred heat from the internals to the outer casing for cooling hence not much heat generated by the internals due to low friction(hence less heat in the exaust fume), OR, oil did its job properly as a lubricant (as engine felt more smoother) hence very less heat generated by the internals, then from where the heat came to the outer casing?? OR both!

Or the oil I use just stay in the engine without doing anything at all..

Well I expect someone to explain, thereby we all can get a thorogh knowledge on how engine oil acts inside the engine apart its properties, a bit of Chemistry after all.. I would like to see many contributions on this..

Hi Shreeni,

Yes will upload the Bill tomorrow.
Paid Rs 3456.00 in the Bill.
Additional Rs 970.00 + Rs 50.00 for Chain Sprocket (Purchased in black from outside)
Engine Oil was personal Rs 450.00 for a litre of the CBR ones.
Fork Oil was personal Rs 100.00 for 350 ml of ELF.
Dot-4 Brake Oil was personal of Castrol.

Thanks a lot for the above info.
Will be waiting for your post

1. An oil is a loosely packed set of particles,which is why they are able to move easily and give you fluid consistency, hence will be lesser in temperature compared to the solid mass of metal.....How much of oil did you touch or pour onto your hand or fingers to know the heat ? I am sure you would have taken a few drops on the dipstick ,touched it and made your observation. First of all heat contained by the small amount of oil will dissipate into the colder surrounding and so when you touched it, it was relatively less hot. If you had drained the entire 1+ liter of oil and pushed your hand into it, you will know the actual heat,by touch(DON'T EVER DO IT).....
2. In the exhaust there is a Cat convertor which works on heat, and then you have the "silencer" and/or baffles which sends the hot gasses through a labyrinth to cool it so it's velocity diminishes and reduce the sound it emits.
The heat in exhaust,and engine will rise if you change to lesser viscosity oil (lesser particles),so engine oil does take heat away..many here have experienced it when they changed to a 20w40 from 10w30 grade oil.
Hope I make sense.