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Discussion Starter · #1 ·
SIX PRIMARY DIFFERENCES BETWEEN MOTORCYCLE
AND AUTOMOTIVE ENGINE APPLICATIONS:


1) Motorcycles operate at significantly higher operational speeds than automobiles, placing additional stress on engine components and increasing wear protection requirements.

2) Motorcycles operate with higher engine compression ratios than
automobiles, placing additional stress on engine components and increasing operating temperatures.

3) Motorcycle engines produce nearly twice the horsepower per cubic inch of displacement as automobile engines.

4) Many motorcycles are air-cooled or use a combination air/oil design. Though effective, they result in greater operating temperature fluctuations, particularly in stop-and-go traffic.

5) Because the engine and transmission share a common sump, many
motorcycles need a multi-functional fluid. Many motorcycles also
incorporate a frictional clutch within the transmission that uses the same oil.

6) Motorcycles are typically used less frequently than automobiles. These extended periods of inactivity place additional stress on motorcycle oils. Rust and acid corrosion protection are critical.

Oil, is the Lifeblood of your engine. The oil filter, is the Kidney that keeps it clean.

The Best isn’t cheap
Cheap isn’t The Best


Bob
 

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Agree with most of the points Bob, but I have to say the #3 has room for arguement. Goldwing: 1832 cc and 117 hp. Honda 1.8l four cylinder v-tech auto engine (my former Acura Integra Type R): 195 hp. Honda 1.6l v-tech (my old Civic Si) 145 hp. HD CVO Ultra 110 (1850cc) 95 hp. Honda RC51 999cc 127 hp. Honda CBR1000rr 998cc 154 hp. Dyno'd hp at the bikes rear wheels and SAE net HP on the two cars. Obviously these aren't always the case scenarios, there are bikes such as the new ZX14 and the Hyabusa well into the 160+ range, but there are lots of low displacement autos well over the 200hp range now too.
 

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Discussion Starter · #3 · (Edited)
Have to remember.....

There is no 100% case closed scenario. That would be like saying if one apple is rotten, the entire bushel is rotten.

There are exceptions to every rule.

My truck redlines at 3500, 359 CI, peak HP of 215 at 2900 and Max Torque of 460 lb ft at 1400 RPM... Exception to the rule.

Oil, is the Lifeblood of your engine. The oil filter, is the Kidney that keeps it clean.

The Best isn’t cheap
Cheap isn’t The Best


Bob
 
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