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Crank tolerances
Posted: March 8th, 2011, 8:04 pm
by AMA714
Roosty or someone that has good info handy...
I have scoured the files here and cant seem to find the service limits on the big end. What is the side to side tolerance. I was just going through a new to me 90 CR 500 and want to check the crank.
Thanks
Posted: March 8th, 2011, 11:23 pm
by 2strokeforever
.016"-.031" and toast is .04"
theres a pdf manual floating around online, its handy
Posted: March 9th, 2011, 4:48 am
by Roostius_Maximus
ive seen NEW honda ones show up with more than .050" tho
Posted: March 9th, 2011, 6:12 am
by AMA714
so when you get a new one at .050 what do ya do?? I do not have any up and down/front to back movement, but it does have a touch of side to side. Wasnt sure what the thrust washer/rod clearance was from new...
Posted: March 9th, 2011, 7:46 am
by Roostius_Maximus
run the shit out of it
Posted: March 12th, 2011, 10:12 am
by 87CR500Rider
Next time you're over I'll show you the original crank out of my 87'. Sloppy as hell, cylinder shaped like a stop sign and it still pulled a HOH modded 450 up the big hill. If you can't find the service manual on here, bring a thumb drive with you next time and I'll give it to you. You need it regardless.
Posted: March 21st, 2011, 8:03 am
by AMA714
Thanks Tony.. I measured her up 0.036 so Im running her
Posted: March 21st, 2011, 10:11 am
by 100hp honda
got 2 new ones. .032 and .029. doubt ill ever check the side play again. if the rod dont break in half is all i care about
Posted: March 21st, 2011, 12:57 pm
by AMA714
Thanks HP.. just felt a little movement when I stuck my fingers in and pushed rod side to side... feels worse than it measures..lol