I recently purchased a 1982 Honda CB650SC Nighthawk. 17500 Miles. 5 Speed. 4 Cylinder Engine 650cc (probably actually around 627cc) Carburated. Earlier today (12:00pm), I warmed the engine up and tested the top speed it varied between 69-70 MPH.
Just a bit ago (around 6:00pm), I tested it again and it would not go above 64MPH at 5500RPM. The top speed earlier was probably because the wind was higher speed and i was downwind. I was also downwind this time, but the wind speed was not as high.
However...I would think that a 650cc 4 Cylinder would go faster than 64MPH. I only weigh 160lbs, so its not like I'm weighing it down a whole lot. The oil looks new, and the air filter looks new. I recently lubed the chain with the recommended gear lube as well. The tires are also properly inflated. What is keeping my speed down? Or is an engine like that just not that fast? I have a feeling it should at least reach 85 (like the speedometer goes up to) Please give me any suggestions
2007-03-24
11:36:43
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14 answers
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asked by
Anonymous