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Old 11-01-2006, 07:33 AM   #15 (permalink)
Mathew Roth
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RE: Big bore questions round II - Crank Grinding?

Brad,

Just thinking out loud...

That's why people call it a "Passion" with a capitol P...normally
motorcycling isn't cost effective from an insurance, safety and
maintenance standpoint anyway...

Also remember that Honda built a product. Yes, one that was engineered
carefully. Sometimes engineering involves balancing cost vs.
performance. This is a sport-touring machine...why do we go to the
expense of putting in Gold valves, adding sport oriented tires and
Penske shocks? It has no cost benefit that's for sure.

As with any overbore, there is a choice to have the cylinders sleeved or
re-lined with a alumasil (?) or nikasil coating that can be done
aftermarket. I'm not experienced enough to know first hand, but I
think with the advent of aluminum blocks this technology is readily
available to the aftermarket consumer should it be needed...at least if
I wanted to bore out my Civic or Ford econobox I think it could be done
too, but I'm ruminating not speaking from experience...someone enlighten
me...

I know that Dynamo Humm had to gain some experience to get the job done
right, and that experience is valuable, but the job is within reason...1
to 2 K$ not on the order of superbike/unobtainium levels...to get 120+
hp out of the VFR...add on a full two brothers exhaust, PCIII and
re-map the whole thing and you could be pulling 125-129 on the dyno!
That's a significant bang for the VFR buck if the bike is your baby...

With that, I'll agree the bike is still a bit of a pig...just a bit of
one...

Cheers,

Matt

Frugal Yankee wrote:
"Maybe there's some tuners out there that know more about Honda motors
than Honda themselves, but all this time & $$$ might be better spent on
making the bike lighter (remember 6 pounds per HP) and handle better."

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