Engine Life Expectancy - Sportbike Forum: Sportbike Motorcycle Forums
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post #1 of 50 (permalink) Old 01-11-2008, 10:43 AM Thread Starter
 
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Engine Life Expectancy

How long do you all EXPECT your M/C's life to last?
100k miles?

If this is so then what is keeping these engines from lasting as long as a car/truck engine?
Poor bearings?
Racing the engine?

I have clevite 77 trimetal bearings in my camaro and they are guaranteed to last 300k

What gives?
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post #2 of 50 (permalink) Old 01-11-2008, 10:50 AM
 
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100k miles is a good estimate. The reason they dont last as long as car engine is that car engines dont spin at 16k rpm.

Vast majority of bikes are destroyed by crashes, not mechanical failures.



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post #3 of 50 (permalink) Old 01-11-2008, 11:04 AM Thread Starter
 
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dang it you replied before I could..
I knew that!!!

How can we fix this problem?

Are the components super light and tough?
Are there any flaws to where we could UPGRADE high-spinning components? I'm guessing no...

Where can I get GOOD engine bearings and the such for when I have to rebuild mine...
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post #4 of 50 (permalink) Old 01-11-2008, 11:09 AM
 
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Quote:
Originally posted by ezrollin
dang it you replied before I could..
I knew that!!!

How can we fix this problem?

Are the components super light and tough?
Are there any flaws to where we could UPGRADE high-spinning components? I'm guessing no...

Where can I get GOOD engine bearings and the such for when I have to rebuild mine...
You are getting away from my area of expertise. I seriously doubt you will have to rebuild an engine. For one, it makes little economic sense. The price of the rebuild will likely take you close to the price of a new bike. They are cheap! Use them, abuse them, break them, and get new ones!



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post #5 of 50 (permalink) Old 01-11-2008, 11:11 AM Thread Starter
 
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maybe I should just buy a brand new engine then when the time comes?
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post #6 of 50 (permalink) Old 01-11-2008, 11:13 AM
 
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Quote:
Originally posted by ezrollin
maybe I should just buy a brand new engine then when the time comes?
Most manufacturers wont sell you one. Honda is the exception, and they sell only a limited number. The reason is that selling the engine seperatly will cost more than the bike does.



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post #7 of 50 (permalink) Old 01-11-2008, 11:18 AM Thread Starter
 
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dang, thats harsh
I love rebuilding engines cause I'm really good at it!

So you are saying it would be more economical to buy a liter bike and stay outta the high rpms as much as possible for longer life?
thanks
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post #8 of 50 (permalink) Old 01-11-2008, 11:23 AM
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When I bought my new R6 motor (used) after waisting the first motor (because the oil plug fell out some how, still don't know how? ), the yamaha dealor told me to go to ebay or find a used motor on craig's list. I have learned that when buying a motorcycle, you are technically just buying a motor. Just add a couple tires, seat and handle bars, and Va-LA!!! You got you a croch rocket. I don't think you can actually buy a new crate motor for bikes. But, you might! I just haven't had any luck doing it. My used motor costs me $1500. It had 30,000 miles on it..

"The good, & the evil; there never really is one without the other...!?"
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post #9 of 50 (permalink) Old 01-11-2008, 11:24 AM
 
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I regulalry see used motors on ebay for less than $1000. $400 deals are not uncommon.



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post #10 of 50 (permalink) Old 01-11-2008, 11:46 AM
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Quote:
Originally posted by ezrollin
dang, thats harsh
I love rebuilding engines cause I'm really good at it!

So you are saying it would be more economical to buy a liter bike and stay outta the high rpms as much as possible for longer life?
thanks
No way, hammer the bike to death if you want. If the engine blows up- so what? Buy a low-mileage replacement motor from a salvage yard for $500-$1000.

"Fat, drunk, and stupid is no way to go through life son." - Vernon Wormer.- Dean, Faber College.
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