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Old February 3rd, 2018, 08:32 PM   #35
jkv45
Rev Limiter
 
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Name: Jay
Location: WI
Join Date: Jul 2013

Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes

Posts: A lot.
MOTM - Jun '18, Oct '16
Quote:
Originally Posted by Ghostt View Post
(SNIP)
A common failure of the EX engine is, a blown head gasket. The usual cause of this besides the obvious low water or frozen coolant reasons is, warpage of the mating surface between the head and the cylinders. The string of events leading to overheating is:

High pressure gas leaks from the combustion chamber into the coolant system, thereby over pressurizing it and blowing coolant overboard, then the coolant shortage causes overheating which causes even greater warp age, add on infanatum...
(SNIP)
We had that issue, and made that repair, on our low-mileage '09 Ninja 500 last year.

All good after completing the repair.

Here's additional information from the EX500 forum - http://www.ex-500.com/37-how-s-fyi/6...ad-gasket.html
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