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dads400ex
11-02-2008, 09:00 AM
I have an 05 and 04 450R's both will steam and gurgle after running a hard moto, the boys are "A" and "B" riders and one has engine ice the other regular anti freeze. I need some suggestions as to what to do to stop this or is this normal for these motors? They both have running fans and I have tried new radiator caps. So any help would be appreciated.

By the way I hate the search on this site with hot in the search it will not reconize it and if I put an * behind it, it just sits there.:grr: so I have tried to search.
Project300EX
11-02-2008, 09:09 AM
Are they running lean?
dads400ex
11-02-2008, 09:41 AM
I don't think so. Plugs look good, have not had it on a dyno or a meter. The O4 is jetted richer than the 05 just to see.
k265r
11-02-2008, 10:05 AM
try some purple ice it is made by royal puple. add a little with your antifreeze water mix it works better than the others. seen it drop tempertures in a 57 chevy 20 degrees.
d3ktrix
11-02-2008, 10:42 AM
Originally posted by k265r
try some purple ice it is made by royal puple. add a little with your antifreeze water mix it works better than the others. seen it drop tempertures in a 57 chevy 20 degrees.

If his bikes are over heating to the point they are boiling engine ice and normal antifreeze there is something serious wrong.
Adding additives to raise the boiling point of the coolant will do nothing but hide the problem, not fix it. The bikes still be over heating, the coolant just won't boil.
Fix the problem, don't hide it.
k265r
11-02-2008, 10:11 PM
Originally posted by dads400ex
I have an 05 and 04 450R's both will steam and gurgle after running a hard moto, the boys are "A" and "B" riders and one has engine ice the other regular anti freeze. I need some suggestions as to what to do to stop this or is this normal for these motors? They both have running fans and I have tried new radiator caps. So any help would be appreciated.

By the way I hate the search on this site with hot in the search it will not reconize it and if I put an * behind it, it just sits there.:grr: so I have tried to search.
stock or aftermarket radiators??
dads400ex
11-03-2008, 03:39 PM
Originally posted by k265r
stock or aftermarket radiators??

Stock radiators.
Drewltr450
11-03-2008, 05:09 PM
Check your head gasket im 95% sure that is your problem.