Purchased as an upgrade for our engine. Cap is on an aftermarket radiator for our Outlaw Kart. It fits perfect and sofar is keeping temps down a out 12 degrees. We have only tested during engine brake in on the stand.
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Kx250f. Was boiling over on tight trails . Cap mixed with engine ice and problem solved
Fit and finish is awesome and works great. I use non glycol coolant racing supermoto and this helps raise the boiling point.
No boil overs on last ride
Factory cap created boil overs. Put this on all gone
It worked fine for the first day, much better than the stock cap for enduro, but the next day it didn't stand the pressure and got bent. It started loosing coolant through the cap. Then I straightened it and is working ok again. Hope it doesn't happen again. The bike is a 2015 YZ450F
This cap is amazing compared to the stock one. the stock one i had a real problem riding in the woods through handle bar trails bc it would boil over 2 to 3 times in a 32 mile period. with the 2.0 i can lug around let the bike idle forever and it will not boil over for the price i will buy to put on every four stroke i get from here on out.
Worked great fit perfectly on my 05 ktm 450 sx and fixed my problem of coolant boiling over