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Author Topic: Re-using wrist pins? (cb450)  (Read 1989 times)

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Offline Carver

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Re-using wrist pins? (cb450)
« on: December 23, 2013, 01:46:19 AM »
Alright I melted my 450 pistons. there are a ton of overbores but im not really in the position financially to get my bike all hopped up, I just need to get one of the rolling under its own power. I see a few stock sized on ebay but they're usually really high and sold individually. I found one stock set but it doesn't look like it has the wrist pin. Is it alright to re use the ones in my current engine?
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Offline trueblue

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Re: Re-using wrist pins? (cb450)
« Reply #1 on: December 23, 2013, 02:30:11 AM »
As long as they are not too loose in the rods, they will be fine.  Gudgeon pins don't normally wear that much as they are hard chromed.  ;D
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Offline Terry in Australia

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Re: Re-using wrist pins? (cb450)
« Reply #2 on: December 23, 2013, 03:15:25 AM »
Yeah mate, if your wrist pins don't appear to be damaged, and are still a nice fit in the conrods and pistons, go for it. Cheers, Terry. ;D
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Offline Carver

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Re: Re-using wrist pins? (cb450)
« Reply #3 on: December 23, 2013, 03:18:57 AM »
alright that puts me at ease. I didn't really want to but right now it looks like its the only option.
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Offline tbpmusic

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Re: Re-using wrist pins? (cb450)
« Reply #4 on: December 23, 2013, 07:51:33 AM »
With that sort of damage to the pistons, it's unlikely the cylinders will pass muster - have a machinist check them out. Putting new standard pistons in cylinders that don't meet spec is a waste of your money.
In most cases an overbore is not an attempt for more performance, it's an attempt to restore the cylinders to spec. We generally like them to actually be round.
Also, the 450 has a ridiculously small spec for cylinder taper (less than 0.001").
I rebuild lots of 450 engines, rarely do the cylinders meet specs, I nearly always have to bore them to 2'nd over minimum.
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Offline Carver

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Re: Re-using wrist pins? (cb450)
« Reply #5 on: December 23, 2013, 11:15:29 AM »
yeah i just looked at them in the daylight and they're not good. Looks like ill have a cb451 at least.
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