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Re: [ST] Back from the Track



Somewhat true, somewhat false. An engine that is pushed can still last as long as you are constantly on top of everything. The engine in my GSXR is pushed hard everytime out. It is also an engine that is 100% internally stock ( as I run HW superstock). It hasn't been opened since 00, when it has the normal cam chain slip. Then in went a few replacement parts, some manual cam chain adjusters, and that's it. Just normal clutches (take alot of abuse on starts, especially restarts), valve adjustments, and by yearly inspections of the transmission/bottom end. All maintance, but haven't had anything out of line with damage/wear, and it's still within 5 dyno'd hp of new. 
   
  Justin

david.funk@xxxxxxxxxxx wrote:
  Racing uses up motorcycles. The high rpm wears an engine out.
That is why racers rebuild the engine. Sport bikes are made to run, and run hard. But they don't last forever. There are only so many hours of high rpm running in an engine; pistons, valve train, rods, ... Everything fatigues.
Sure racers take good care of there bikes, but that only lets the bike last its full lifetime.
Buying from a racer is ok, but you need to pay attention to how "used" the motorcycle is. At the end of the season a bike that has done 8 to 10 races and a 4 hour endurance, the engine really really needs a rebuild. The brake rotors might be getting a little thin. At 120mph it does not take a huge bump to really work the shock.

David W. Funk
'00 Sprint ST
Pleasanton, CA


-------------- Original message -------------- 
From: "Sprint ST" 

> Matt, 
> I think you make some really excellent points. The only racers I'd be wary 
> of are the mad scientist types that monkey with the internals of the motor 
> or drill holes in the frame to make it lighter. 
> Rod 
> 
> -----Original Message----- 
> From: st-bounces@xxxxxxxxxxxxxxxxxxxx 
> [mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Matthew Heyer 
> Sent: Monday, June 19, 2006 8:14 PM 
> To: ST@xxxxxxxxxxxxxx 
> Subject: Re: [ST] Back from the Track 
> 
> I also think that people don't understand that performance motorcycles are 
> made to run. So turning, accelerating, and braking hard are what they are 
> meant to do (provided you don't lay it down). Nor burnouts, wheelies, and 
> stoppies - those things put undue stresses on the headstock and bearings and 
> such. That stuff is what can be harmful to a bike. 
> 
> 
> 
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