End of Season "Slippery Slope"

[Draco1340]

"Don't take it apart if it aint Broke"
Vs.
"An ounce of prevention is worth a pound of Cure"

When it comes to a Hayabusa motor, what do people think? Right off the showroom floor I have sprayed the ever-livin-crap out of my Gen II motor for 3 seasons of drag racing in the mid to low 8 second range, and have never split the cases or pulled the cylinder. Only the valves and springs were replaced. With the Kawasaki's I have owned, I would always re-ring, hone, replace all bearings, and resize the rods every winter. And the POS would still inevitably blow up. This motor runs 170 very consistently in the 1/4. I hate to take something apart that's working fine? Sure you can do a leakdown, but that doesn't tell you how your rods and mains are holding out?

What do you guys think?

[m_ridgeway]

just imho, if you have the money and time, why not take it down and refresh it. it may give out when you dont.

[BlueHaya]

if it is running the same as when you started....dont mess with it....just basic maintanence.

Maybe get the get the parts you would replace and hold them in case mid season it does go...you have parts.

[Draco1340]

Rings and valves are easy to evaluate by doing leakdown. I can look for signs of detonation with a boreascope or by just simply looking at the plugs. But the condition of the rods, wrist pins, and bearings have me worried.

One thing that was suggested to me was to do a hot / cold oil pressure test to indirectly determine the condition of the bearings.

[jellyrug]

Do an oil analysis and compare the results to universal averages, based on the Busa motor. Data is available, compare and then decide.

[YSI408]

Take it apart put new rings, rods bearing etc. I would if you have the money.

[Blanca BusaLess]

It's not broke don't F with it !
Murphys law !

[mnrf900r]

I say fix the **** while its still cheaper and easier to fix. An ounce of prevention is worth a pound of cure.
Im a maintenance mechanic, lol

[xchief1320]

Do you cut your oil filter apart to check for metal every oil change? That will tell you alot about the internals.
If it has no metal in the filter, good oil pressure, no noises or smoking issues, and no/low leakdown I would leave it alone personally.