anybody has the idea how the oil cooler works on p220 and zmr?

P200/220 and Karizma have oil coolers for 3 reasons:
a. they all have powerful engines
b. they are expensive performance bikes, so the customer is happy to pay for an oil cooler, which is seen as having a benefit.
c. being performance bikes, they will most likely be thrashed for long durations. This being the most important reason.

I know that Indore is a very hot city during summer but I think using a more viscous oil is not really necessary. But if you insist, I think an xW40 grade is viscous enough to do the job without affecting the engine.

The lubrication system on your HH has been designed for 10W30 oil. So if you use a 20W50 oil, even during hot summers, you risk damaging the engine since the more viscous oil will take a lot more time to flow into narrow gaps, until it is a temperature which allows for normal flow. So your bike, your risk.

Correct inference about engine efficiency and engine temperature.

As explained before, Oil from sump > oil pump > filter > oil cooler > engine > sump > loopback to sump.

@iamvik Thanks a lot !
@all : So what is the final verdict of the discussion guys? Oil cooler for 150cc or not?

Cool, not very cool. Its not possible to make an engine run "very cool" in 40 degs. Forget conventional cooling system like oil/water cool. Even with some serious refregation/air conditioning to the engine, I doublt you can make the engine run very cool in a ..I repeat 40 degs.

Traditionally, problem with engine is over heating, not over cooling especially in hot places. And may I remind you, we are discussing issues on hot climate.

During summer, engine gets hot and does not run optimally, though it can run wihout problem. there is a difference.

As far as engine viscosity is concern a 5w40/50 is sufficient to take care of most weather condition in most of India. Not optimal but sufficient.

@asphalt:
ZMR has oil cool because it has full fairing. This cause less air flow on the engine. Better solution would be water cooled engine, though this would mean extra expense with new redisign engine for water to flow around the engine and more expensive, so the cheaper solution is oil cool.
P220: Engine tends to get hot perhaps due to some engineering shortcoming. Powerful engine will cause more heat though this is not necessarily the only reason as there are more powerful engine that are air cooled.

@on wheels: Reg how oil cool works, Its been already explained. But to add a simple explanation. When bike is running, Oil inside engine gets hot. So oil is circulated from engine to the radiator. Here, air cools the oil, then they are send back to the engine. This circulation is done by the pump.

ans this one please

@kaynmantis P220: Engine tends to get hot perhaps due to some engineering shortcoming.


could you please shed some light upon it......

ROFL

So all bikes with Oil Coolers have engineering shortcomings?

@ on wheels

dude if you’re concern about the engine heating for longer runs then its very much normal. All engine heats up. Even all cooling systems can’t manage to bring down the temperature to the current atmosphere temperature, these cooling system protects the engine from over heating. Even when small family cars run at top RPM and still the cooling system is working the Exhaust Header just get RED-ORANGE like melting iron by immense heat. So think how much heat is producing there.

Just feel free drive longer, no probs. If the settings ( lean mixture etc ) are ok then even if you take 200km ride constant still then the engine wont be over heat.

"Perhaps ".
It is my understanding that Bajaj has yet to come up to the standard of well established manufacturers like Honda in engine development. Hence Honda engine like Zma 223cc is able to use Xw30 oil without engine getting as hot as p220 engine. This may be due to advancement in metallurgy and finer tolerance level, etc. On other hand Pulsar tends to use heavier oil to contain the heat.

@prafultripathy: "So all bikes..." Care to explain where this "all bikes" came from . Never said that. Manufacturers will put oil cooler for a reason. If they can do without one, they'll be happy as it will bring down the cost. If not, oil cooler is the cheaper option.
Read my post again. I said "Powerful engine will cause more heat though this is not necessarily the only reason". Bajaj has been gradually pumping up the engine power instead of designing an entirely new more powerful one. This is bound to happen as some point. Though Zma is rated 3cc more. It does not require oil-cooler. If you install oil-cooler, it'll be better, though why should Honda spend extra when it's running fine without one. Better does not mean it's absolutely necessary.

Edit: BTW I would called the Zmr as an "engineering shortcoming" as it uses Zma engine that was designed to be used without full-fairing. Honda use the cheaper solution...oil-cooler.

+1 to what soumen says.
its really not needed to fit oil cooler dada.

@kaynmantis

Bajaj has yet to come up to the standard of well established manufacturers like Honda in engine development. agreed and they are trying really heard,look at the p 135.

Hence Honda engine like Zma 223cc is able to use Xw30 oil....wrong mate the oem idemitsu engine oil for karizma is 20w40/the new zmr is upon 10 w 30 with a extended draining period.

Hence Honda engine like Zma 223cc is able to use Xw30 oil without engine getting as hot as p220 engine.....the two engines are far too different mate.hero hondea karizmas engine was originally sourced from Honda CRF230,a carb fed engine,single plug relatively longer stroke volume then p 220s.
on the other hand p 220 s is a rebored,highoutput version with twin spark plugs.both the bikes are there own place,its really no comparision in term of anything.just look at the specs of both bike.honda zmr is a very nice bike with butter smooth engine ,but if you look closely the power output in it is not too much high from zma.were and tear and the ultimate load is much less gives a relaxed feel.on the other hand p 220 s engine is highly tuned so naturally it needs a x w 50 grade e.oil

Originally Posted by prafultripathy
ROFL

So all bikes with Oil Coolers have engineering shortcomings? ..i feel you praful.

Ahem..The old Zma is 20w40, Zma-R (My mistake for not mentioning the 'R' ) is 10w30. New Zmr is also 10w30.

My apologies for the long post.

First of all, in a hotter clime, a heavier oil like xW40and xW50 is recommended. The same holds good for modified engines that put out more power and hence generate more heat. A lighter oil will sometimes be too light in hot conditions and thus compromise the oil film between critical engine parts in the worst case scenario.

Secondly, fitting an oil cooler to the Hero Honda Hunk is ery much possible if the bottom end of the Hunk is similar to that of the Karizma ZMR. Also, care should be taken to find out whether the ZMR uses a higher volume/pressure pump. This is important as the higher volume of the oil circulating due to the addition of an oil pump and the related plumbing might require extra pumping pressure.

For the Hero Honda Hunk, the lack of external oil lines make it difficult to tap into the oil lines. A workaround could be tapping from the oil filter housing but here again, care should be taken to ensure that sealing is effective lest the oil pressure falls.

One way to compensate for the extra heat generated is by jetting it a bit rich across the jetting spectrum as the fuel mixture(apart from air) is the main source of cooling for an air cooled engine. People living in places where the temperature goes real high can explore this option. Another option is using a synthetic oil. The main issue that high temperature brings with it is the degradation/breakdown of mineral oil once a certain temperature threshold is crossed. Once the oil breaks down after reaching this threshold, it's lubricating properties are greatly reduced. Synthetic oil basically raises this temperature threshold northward and thus ensures that the engine is lubricated optimally at higher than optimal operating temperatures also. These two ways will make up for an oil cooler in most cases. I suggest trying these options first.

I have an oil cooler on my LB500 and the performance of the cooler is pretty good. The oil cooler's performance has been tested with an LB500 without this cooler. The results were measured by a thermal gun and were pretty impressive. I have tabulated the results on Indiancarsbikes. Mods please delete the link if it infringes on any Xbhp policy. I am attaching a couple of pictures of the oil cooler set up on my daily ride LB500. A set up like this has to e worked out for the Hunk but the first issue is finding suitable oil tapping points.

Cheers,

Jay

@jayprashanth Wow Nice setup, really neat!

Found some Oil coolers that can be fitted to bikes easily. Although possibility of installing in Hunk is doubtful as it is a diff. engine and no oil filter.
Here is the link
Motorcycle Oil cooler installation