2001 Yz426f cooling mods

[sheckman36]

I just picked up a 2001 Yz426f. freshly built top end. I'll be doing more trail riding than mx track. what are some good modifications that actually fix the low speed overheating issues?

[bkoz]

Coolant catch bottle off a WR

[GlennRay]

On 6/19/2017 at 5:44 PM, sheckman36 said:

I just picked up a 2001 Yz426f. freshly built top end. I'll be doing more trail riding than mx track. what are some good modifications that actually fix the low speed overheating issues?

Riding it like it was designed for, on an MX track!

[SteveThe Snakes]

Add more coolant until it does not puke out or use Evans. 

You should try 70% coolant to water. 

[sheckman36]

Okay thanks for the feed back fellas. Is evans better than or equal to engine ice? I just put engine ice in it. What about the boyeson water pump cover and impellar? Is it worth the purchase?

[SteveThe Snakes]

1 minute ago, sheckman36 said:

Okay thanks for the feed back fellas. Is evans better than or equal to engine ice? I just put engine ice in it. What about the boyeson water pump cover and impellar? Is it worth the purchase?

Evans is a different animal and does not mix with anything else. It does not boil.  

The easiest is adding more coolant  

By the way unless it is boiling over it is not overheating. If it is boiling over and you run it dry enough you will fry the top end. 

I don't run poison boyeson impellers or covers. They may make a minor difference. 

[FORMA MOTO]

1.6 bar radiator cap and a Tusk Racing fan kit.