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Old 11-17-2006, 06:30 AM   #11
pplassm
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Default Re: MO Reader Question: What's in a Spec Table?

One possible explanation of the ridiculous weight claims is that the bikes are never weighed at all. Instead, the combined weight of all the parts that make up the motorcycle is summed, and that is used for the "Dry Weight" figure. Since all parts of the motorcycle have an acceptable tolerance, simply using the lightest possible weight for each part results in a highly optimistic mass figure.



The same could be true for power figures, that is, the power is never actually measured. Instead, calculations of flow rates, BMEPs, and friction based on the most favorable possible tolerances are used to calculate theoretical optimal power production.



Of course, this is all highly speculative, and I deny any possible connection to the motorcycle industry.
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Old 11-17-2006, 08:28 AM   #12
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Default Re: MO Reader Question: What's in a Spec Table?

The only numbers I look at are at what RPM peak torque and peak horsepower hit. That gives you an idea how usefull the bike will be on the street. For example a GSXR 1000 hitting 161 HP. at 12.5K RPM and 81 lb/ft of torque @ 10K RPM is just not going to be that good a bike to ride on the street day in and day out. You wouldn't be coming anywhere near the bikes potential and you have to suffer with a track oriented riding position that gets old quickly.



Something like an SV1000 with a HP peak of 110 @9K and torque peak of 71 @ 7.5 K would be more usable because though it's still up there its reachable. Another thing to look at is final drive ratios and brake disc sizes, those all give you an idea as to how the bike will perform in the real world.



Ultimately it's how well the bike fits you and how much fun it is to ride that counts as longride said. My own "compression rate' is how hard it is to compress my butt on to the bike and ride it. In that case less compression is better .
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Old 11-17-2006, 09:10 AM   #13
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Default Re: MO Reader Question: What's in a Spec Table?

Sarnali speaks true. Low-end torque is thy friend.
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Old 11-17-2006, 09:12 AM   #14
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Default Re: MO Reader Question: What's in a Spec Table?

Agreed, but don't forget that a lack of a compression rate can be compensated for by an adequately-rated Johnson rod.
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Old 11-17-2006, 09:19 AM   #15
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Default Re: MO Reader Question: What's in a Spec Table?

For dry weight I prefer my "Honda says the new CBR600RR is 374lbs so we gotta claim the new R6 is 373lbs" theory.
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Old 11-17-2006, 09:20 AM   #16
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Default Re: I'm just askin'

Shut up @sshole.
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Old 11-17-2006, 11:17 AM   #17
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Default Re: MO Reader Question: What's in a Spec Table?

Low end torque sure works for me. As does an properly spec'd Johnson Rod.



I'm still waiting for a better spec on ergos. I like the "stickman" overlays that I've seen in a couple of mags - I forget which. Wish they'd make 'em bigger and use more contrasting colors.

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Old 11-17-2006, 11:19 AM   #18
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Default Re: MO Reader Question: What's in a Spec Table?

Babe Magnetics trumps all, I'm afraid. Harley's....well, you know.
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Old 11-17-2006, 11:21 AM   #19
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Default Re: MO Reader Question: What's in a Spec Table?

This is Logic and Common Sense being spoken. Don't do it again.
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Old 11-17-2006, 11:22 AM   #20
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Default Re: MO Reader Question: What's in a Spec Table?

I don't agree about wearing out faster; the BMW K1200LT has a CR of 11.5:1 and I have read of several going 150,000 miles with little trouble. Air cooled engines with high CR can be a problem, but today most GOOD cruisers and nearly all sport bikes are water cooled. Over heating is rarely a problem then. Just stay away from HD air cooled motors however, unless image is the one's "Big Thing".
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