The OIL STOREY
This is a graphic example of what an engine looks like after 247,000 kms.
This engine has not been well looked after, oil changes were missed and it has been on long hot trips to Florida in the summer, 2 up and fully loaded. The first 25,000 kms of its life was spent as a demo bike. The original fuel pump, drive sprocket and voltage regulator were either recalled or replaced under warranty. Right up to the point were it was put into storage it would easily run 55 mpg or about 20 km/l on trips. I have been told many times I should be using an aftermarket brand of synthetic oil, I have not. I have decided to replace the original crank with a newer "freedom engine" crank that has a different profile and counter balance shaft. The reduced vibration and that fact that I had a spare crank helped with the decision to take the engine apart and share what I have found. First picture is of the pistons, please take note the engine has run almost always on regular fuel in Canada and mid grade in the southern USA.
Now looking at the first picture of the piston tops the amount of carbon on them is pretty insignificant, but what I have not told you is the piston on the left is from a 2002 that had about 1000kms on it It was changed when that engine was converted to a 100ci engine. This piston on the right has 247,000 kms on it and is the original piston. The middle picture is the same 2 pistons and you can see the oil has actually stained the piston a golden colour. The wrist pin was pushed out by finger when it was removed. The rings and pistons have such little wear on them I am putting them back in when I re-assemble the engine. The 3rd picture is the piston skirts and again the newer piston actually looks to have more wear on it, but neither has a measuarable difference from "new" specs. You can click on the pictures and you will see a larger image. As I have tried to capture the wear and tear on this engine, even the cylinders are in extremely good condition. It is impossible to feel a "ring ridge" that usually develops. While there is a shine at the top of the cylinders and carbon build up the carbon was easily removed with a little rub of emery cloth. The cylinders are also being reused as is.
This next set of pictures are of the crank and counter balance. Other than the golden stain there is no indications of wear on the bearing surfaces and end play of the big end is well within specs and is still fully serviceable. The same goes for he connecting rods as the fit of the small end and wrist pin again are well within service limits.
Even the chain sprockets for the valve train show no signs of wear. the chain still fits snug around the sprockets , this indicates the chain as well has not worn or stretched and again is still serviceable.
Th last set of pictures are of the gear train from the crank to the clutch basket as well as the torque compensator.
Last picture is the oil used in this motor, it works very well, its not the most expensive! However it leaves no argument for warranty. Its Victory oil, its a Victory engine, then a failure would have been a Victory problem. However after 11 years of selling Victory Motorcycles I have yet to have an oil related failure. For that matter I have not any engine fail that was not human related (one) not bad at all. However I have seen a number of Victory with so called performance parts installed that the was found on the internet or in forums. Just about all I have removed for the owner and retuned the motor and they were much happier with performance and mileage and starting. The internet has been responsible for a lot of misleading information. I'll stick with Victory oil and lets not talk about it any more.
Thanks for reading . Any comments can be sent to firstname.lastname@example.org