FRZ 400 Mechanic | Page 3 | GTAMotorcycle.com

FRZ 400 Mechanic

Relax

Well-known member
For the cylinders with low compression, add some oil to them (through the spark plug hole) then rerun the compression test to see if it increases. If it does, it's the rings. If it doesn't, then it's the valves. Or possibly the head gasket - you can tell if there are bubbles in the cooling system as you perform the compression test, or if it's really bad, you will see the coolant overflow bottle filling up when it runs.
 

nigel

Member
So adding oil to the engine cylinders definitely increased the compression across all of them. It was still hard to start but we got it going and it ran fine. Took it for a spin and everything felt good. Turned it on and off several times and no problems starting it. Then we left it for a day and it would not start again so it does sound like the rings. I am wondering if the rings are stuck due to being in storage for three years and if running it for some time will free things up. I don't really want to take the engine apart but it is definitely looking like that is what will end up happening.
 

nigel

Member
Did it start and run okay prior to having been placed in extended storage?
Yes I was using it every day for six months of the year for seven years. Also, once I did have it running the other day it was fine, good power, responsive and smooth acceleration.
 

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