Need to know weight of OEM wrist-pin

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » April 6th, 2009, 7:34 am

I've got a few different pins that HAD been marked to say what they were from, theres 6 and not 2 the same. I need to compare a balance factor and need to know what baseline Stock weight is in grams

100hp honda · Post by **100hp honda** » April 6th, 2009, 7:58 am

i have one but no way to weigh it

robertg · Post by **robertg** » April 6th, 2009, 8:12 am

I am pretty sure I have a stock one. I will try to get it weighed tomorrow.

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » April 6th, 2009, 8:16 am

Thanks!

fastkart · Post by **fastkart** » April 6th, 2009, 3:19 pm

If all else fails I have a stock top end thats going to come out in the next week.

robertg · Post by **robertg** » April 7th, 2009, 2:53 pm

The one that I have is 82.16 grams. I'm not 100% sure if it's OEM, but the piston was.

jbird_710 · Post by **jbird_710** » April 7th, 2009, 4:25 pm

I just checked a brand new OEM I'm about to install and it weighs right at 3 ounces on my postal scale. It's not digital but seems to be fairly accurate.

82.16 grams is 2.9 ounces so robetg's pin is probably OEM also.

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » April 8th, 2009, 7:30 am

Thanks guys! I needed to start from a baseline.
i've got
60.3
60.4
77.4
79.4
82.1
83.4
and
86

Janne · Post by **Janne** » April 8th, 2009, 8:00 am

There is a great span in weight you have there, do you have any idea what brand the lightest are?

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » April 8th, 2009, 12:41 pm

everything from oem, vertex, 3 different wiseco, and prox

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » April 8th, 2009, 12:42 pm

what width is that wristpin you have in your wiseco?

Janne · Post by **Janne** » April 8th, 2009, 1:01 pm

Home from work, so I could do some measurements.

The wiseco pin width is 60.0 mm and it weights 61.2 gram.

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » April 8th, 2009, 1:34 pm

i just got the scale out for the old pistons i have
OEM 89mm 404.6 pin 82.1 69mm wide
prox 89.75mm 418.7 pin 79.4 69mm wide
636 wiseco 89mm 374.2 pin 59.9 60mm wide
554 wiseco 89.50mm 360.3 pin 84 60mm wide

weights are without rings or clips, and obviously there is going to be a small change with oversizes

i'll have a pair of 2 different new honda pistons to weigh tommorrow too.

BannedCR500Riders.com

Need to know weight of OEM wrist-pin

Need to know weight of OEM wrist-pin