If your bike is in good condition and has been run in well, I assure you it will not overheat even if you ride it non-stop for 200 kms in 40'C.

Are you sure? Then I need not to think about it.......

For an unmodified air cooled engine like in most Indian bikes, adding an oil cooler will have negative consequences. Over cooling will cause the engine to not reach normal operating temperatures and both performance and fuel consumption will suffer. An oil cooler is useful only if the engine is modified to produce much greater power than standard. For example, a 100 cc 8 BHP engine modified to produce more than 10 BHP.

If you use your bike mainly for long distance riding, assuming the carburettor is tuned to factory specs, there shouldn't be any overheating. The constant movement of air will cool the engine well.

Yes, I am sure
You would be spending money for nothing. Invest it somewhere else

rather spend on HID's or a rear disk break!!!!!!

Yes .... may be for some 250cc bike.......!!!

I have already spend money on HID, and later came back to stock ....... Rear disk break would be cool..

Don't think so. In fact, my bike engine during peak summer afternoon runs quiet rough compare to early morning when temperature is cool or during winter, the bike runs smooth. Bike also runs smoother during monsoon when engine is constantly cooled by rain. This shows that for optimum performance, bike should be running cooler than it does while commuting during day time in dry summer. Are 'fins' (air cooled) sufficient? yes. Meaning they are NOT optimum, but good enough. Oil-cool can make it better...at extra cost.

BTW there are bikes running in very cold places in the country without problem with the exception of perhaps having cold start problem. These bikes are running much cooler than those running in very hot places like me. No amount of oil-cooled mods can make my bike run as cool as those from very cold regions. So to say that adding oil-cooler for unmodified bike in very hot place will over cool the engine is not true. Its the expense.

^+100 to your post my friend! Air cooled bikes react differently in different seasons.
Now-a-days i find it so difficult to rev up when i ride for an hour or so..it almost 42deg. here!
If it can be done on p200 or ZMR then why not on hunk?
I think if done properly, it may increase performance also.

well there are oil pumps avalable for 4 wheelers which have considerable flow force ... so if one can make juggad to use it ,one may attain a nice speedier oil flow through radiator ..

basically what my idea is that geting a nosal at the bottom of crank case and one at the top of cyliner head and radiator fallowed by a oil pump .. flow through rad is always restrictive for flow to some extant moreover timing chain work as conveyor for oil and dump at the same place where it picks the oil so basically its dead end at the top of cylinder head cap .. so a nosal there will serve a good place to sink cool oil from radiator cooling the whole bore walls with its flow downward ..

and since only dead ends are involved i.e carnk case bottom and cyl head cap .. the stock oil flow lines will continue to work as b4 but will get cooler oil by secondary flow circuit ..

The correct place for an oil cooler is after the oil filter if present, if not, after the oil pump and before the main oil gallery where the oil flow splits between the crankshaft and cylinder head. Just look at the way it has been fitted to the Pulsar. That's the right way.

ur saying oil filter ->oil pump ->radiator ->[to components required cooling]

well just re read what i have written there! why would an automobile company will install a wrong sequence if it can actualy has its own R&D department .. sure thats the correct way ! applicable for pulsar engines ..

what i was saying :
reservior -> EXTERNAL OIL PUMP -> radiator -> [to components required cooling]

the secondary stream will mix with that of timing chain & will make it cool . no need to disturb existing circuit!

what i was saying that install a SECONDARY CIRCUIT and DONOT MODIFY EXISTING FLOW CIRCUIT ... coz internal oil pump may not be capable enough to handle that flow of oil...

A secondary cooler circuit will not only make the oil run cooler but we will achieve the same effect with minimum cost and efforts....

more over one can always design or i must say redesign whole internal oil flow mechanism if he has the expertise and required tools for that same ...

goal here is to get lower temp of circulating oil with out fiddling with existing circuit at the same time least modificatin and thre fore cost!

getting my point!

I'm sorry but your first post on how you suggest an oil cooler should be installed is difficult to understand.

It seems that you have misread my post. The flow direction should be pump > filter (if present) > oil cooler > engine. And this is for both lubrication and cooling.

You talk about timing chain being a delivery mechanism. That is not correct. There is separate high pressure oil channel to deliver oil to the cylinder head. Oil must be under pressure to flow through the very narrow clearances between bearing surfaces. A simple splash lubrication is not at all sufficient.

Adding another pump is not as easy as it sounds. It requires a lot of modifications and the total cost is actually quite high. For example, how do you propose taking power from the engine to power the secondary pump? Where will the pump be fitted and how will it have access to the oil from the sump? How much power will the secondary pump require? Which ready made pump will you choose? Etc.

In any case, there's no need for one. The standard pump has enough flow for the engine's requirements. The entire output of pump should pass through the oil cooler and then back into the main oil gallery so that there are no flow losses.

@iamvik
Thanks for the Insight but the bell which still rings is why do p200/zmr have an oil cooled engine?
Moreover i could feel the heat from the engine which was not regular even in summers. Viscosity is not a problem because i switch to 20w50 in summers from 10w30.
Correctly stated that only undercooled engines require a separate cooling mechanism but an engine running at the correct temp. will be more efficient i think..Please correct me if i am wrong.
Although attaining correct temperatures is very difficult on custom setups.