Hi guys,

Would my stock radiator be ok with a 300 engine.
Would it also make a difference with other engine mods, eg HRC flywheel, wiseco pistons?

Would getting some samco hoses help the cooling?
Would the ramair box help too?

Or is a aftermarket double/triple core radiator is the way to go?

And Power = heat, yes?

Thanks
Minh
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It's Good to be Bad!

The standard MC21 rad seems to cope well with the 300's.
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If I have to take the carbs off once more...

The mighty 300 is running well, amazing how an 'old' bike gets a small crowd around it when it goes out.

Anyway, she is running at a coolant temp of 67 - 70 degrees - steady state, 65mph on the road.

I think that this is a little hot (certainly I used to race my RS at 52 degrees).

Any opinion out there on this? I am considering a radiator cut to lover the temps. I figure that it is not entirely efficient with water flow from right to left. Has anyoe tried inserting some block off sections in the side tanks to make the water flow a zigzig (top right - left - mid right - lower left and exit). This may promote more efficient cooling?

I'm running a stock MC18 rad. It works even in the heat of Thailand, except stuck in Bangkok traffic. Hubble bubble toil and trouble etc.

I have a small ( 90mm/3.5") fan from a Honda Sonic and will be fitting a second. Switch on in traffic switch off above about 65 kph.

Might bung in some Motul radiator additive for good measure?
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If the rats eat my wiring one more time....