Powroll Motor Performance - Since 1964  

 

 

For a limited time

 

 

 

 

 

Powroll

13840 Commercial Lp

Crooked River, OR

97760

 

Mail:

PO Box 920

Redmond OR  97756

 

Phone

541-923-1290

 

Fax

541-923-5637

 

Email

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Powroll - 4 Stroke Performance

 

Good morning, we hope you are well rested and ready for the third day of our tour.  I am Igor, your tour guide.  I see the majority of our guests were able to join us again today.  My condolences to the families of those who left us during the night.

Welcome to our 3rd exhibit hall.  Those of you who wish to use the facilities, please note their location outside, to the left, over the moat (please do not feed the moat monster). 

Our first exhibit this morning is a test of your evaluative skills.  Here we see the sight that presented itself to my master when he decapitated..er..removed...the head from this poor engine.  Please make close inspection of the unusual valve markings on the piston.

Yes, as you can see, this engine was obviously possessed by the same demons which inhabited the body of that poor girl in The Exorcist - the piston was obviously spinning about in the cylinder just as her head spun about on her body.  That was my first thought also.  However, my master soon showed me the error of my ways.

Grabbing me by the neck, he forced me to make a closer inspection of the piston.  After I regained consciousness, I agreed that these unusual markings meant not that this engine was possessed of a demon, but that the demon riding the machine had revved the living daylights out of it, causing the small end of the rod to break, and allowing the piston to rotate 45 degrees where it then made high-speed contact with the valves.

Removal of the cylinder showed this to be true.  Note that the lower half of the piston, including the pin boss and ring groove areas, has completely disappeared.  Part of the oil ring can be seen here, the rest is somewhere down in the bowels of the engine.

Our view of the crankshaft and lower end is also illuminating.  The piston pin is still intact and attached to the rod.  Note that another section of the oil ring set can be viewed in its final resting place, twisted around the crankshaft.


My master says every engine has a story to tell.  The trick is to learn how to read its language.

 Thousands of engines are needlessly killed every day because the mechanic and/or owner did not know how to properly read the signs the engine was giving them. 

Many times parts are replaced without a thought being given to why the part failed in the first place.  Finding the cause of a problem is the first step in solving it.  Without the ability to read an engine and evaluate it properly, a person is not a mechanic, but simply a 'parts replacer' who blindly throws expensive components at an engine until the engine gives up, or the owner runs out of money.

My master also taught me that sometimes the cause of failure is not inside the bike, but the lump sitting on top of it.   Master says "Improper use of an engine will cause failure - failure to use the clutch, failure to shift at the proper point, failure to listen to the signs of impending doom...these things will damn a rider to a life of broken engines, empty wallets, and shattered dreams."


Enough frivolity for one day!  Let us continue with the tour.

Our next exhibit shows an example of too much of a good thing.  The master says Yamabond 4 is an excellent compound for engine assembly and when properly used can help to keep vital fluids from oozing out of your engine.  Master uses this grey silicone-like substance because it stays flexible, even after years of high-temperature abuse.  However, like any tool in the hands of a fool, the Yamabond 4 used in this particular engine did more damage than good.

The 'professional' mechanic who assembled this engine was truly a believer in 'if some is good, lots must be better'.  Utilizing at least 2 tubes of sealant, the mechanic managed to not only seal the engine from external leaks, but also seal the head from receiving lubrication, resulting in engine failure after only a short run time.

"...This concludes today's portion of our tour.  You are welcome to spend the night and continue with us tomorrow.

Ah, I see I have no volunteers to stay the night?  Well, in that case, we hope you enjoyed your time, and we wish you the best of luck in the future.  Please do not panic and crowd the exits.  Panic excites the hounds.  There, now you've done it.  The hounds have blocked the passageway again.  Well, we have no choice but to offer you another night's lodging.  In return for our continued hospitality, you will be asked to make a small donation - no, no, it is not necessary to get out your wallet - opening that vein on your arm is easily accomplished...

To be Continued...

 

Powroll Motor Performance

13840 Commercial Lp  Crooked River, OR  97760     Phone (541) 923-1290    Fax  (541) 923-5637

Copyright © 2007 Powroll Inc.  All rights reserved.  All photos and text are the intellectual property of Powroll and cannot be reproduced without permission.

Descriptions and pricing are subject to change without notice.