Thinking about an oil cooler

[jk333]

Im thinking about putting an oil cooler on my bike. It seems to be getting a little bit too hot on mild freeway runs. Is there an econimical way to plumb my bike for one or is it something more exclusive to a kit?

[Johnj]

Have you rejetted your carbs to account for the free breathing air filters?

[jk333]

Have you rejetted your carbs to account for the free breathing air filters?

No, I havent yet. I was thinking about some performance exhaust sometime in the near future and then I planned on rejetting. Could that cause the motor to get too hot?

[jstark47]

Have you rejetted your carbs to account for the free breathing air filters?

No, I havent yet. I was thinking about some performance exhaust sometime in the near future and then I planned on rejetting. Could that cause the motor to get too hot?

Freer breathing air filter could make it run lean. Leaner usually = hotter.

[jk333]

Have you rejetted your carbs to account for the free breathing air filters?

No, I havent yet. I was thinking about some performance exhaust sometime in the near future and then I planned on rejetting. Could that cause the motor to get too hot?

Freer breathing air filter could make it run lean. Leaner usually = hotter.

You know, I really dont think i took it for a long run on the freeway before I did the cone filters, so ive got nothing to compare too. Thanks for the info. How would I go about plumbing an oil cooler incase i still wanna run one?

[mydlyfkryzis]

Have you actually measured the temperature? How do you know it's too hot?

Also, the cone filter on the inline fours tend to run uneven. the center carbs do not receive the same air flow or air pressure as the outside carbs.

This is what you might be experiencing too.

The OEM airbox assures the air to each carburetor is the same density, temperature and pressure.

Those pod filters look nice, but require individual carburetor tuning to make them work.

[jk333]

Have you actually measured the temperature? How do you know it's too hot?

Also, the cone filter on the inline fours tend to run uneven. the center carbs do not receive the same air flow or air pressure as the outside carbs.

This is what you might be experiencing too.

The OEM airbox assures the air to each carburetor is the same density, temperature and pressure.

Those pod filters look nice, but require individual carburetor tuning to make them work.

I judged it just by putting my hand by the motor. It felt alot hotter than normal city driving, then again it does turn alot more constant rpm on the freeway.

[paul246]

Pull each of your plugs and examine them for colour consistency. Check them against a spark plug comparison guide from a manual.

Then take the bike out on the open road, ride at a constant highway speed for a few minutes, don't change throttle settings at this point and flick the kill switch to "off". Let the bike coast to a safe place on the side of the road and re-check your plugs.

My guess is your bike is running too lean and will require re-jetting to accomodate the non-stock air cleaners. Also, make absolutely certain you don't have any air leaks on the engine side of the carbs. You can test this by spraying WD40 over the area in question. If the RPM climbs when you spray you have an air leak.

[gsJack]

Those early 80's twin cam Honda fours did run hot. When my 82 CB750K started to crap out I added an oil cooler and got another good 15-20k mile year out of it.

[jk333]

Those early 80's twin cam Honda fours did run hot. When my 82 CB750K started to "crumb" out I added an oil cooler and got another good 15-20k mile year out of it.

Where did you run the oil lines too on the motor??