Crank Tuning Setup "shadetree method" beware large pics

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house
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Crank Tuning Setup "shadetree method" beware large pics

Post by house » Sat Jan 30, 2010 1:48 am

Edit - add preamble
Member 'house' has come up with a method for jigging up the crank for measurement during alignment that avoids expensive equipment. Also, house included a good link on the alignment process. Thanks house :thumbsup:

If there's no welder on hand, a sawn off bolt sharpened, and a nut used to lock the points to the vice should do.

--- Related crankshaft alignment threads --
For convenience, here's some links - Credit's to all:

Clivester
http://www.hondaspree.net/phpBB3/viewto ... aft#p98430

Turing the Crank - Wheelman-111
http://www.hondaspree.net/phpBB3/viewto ... =8&t=12900

Noisguy hunt's down how to true a crank
http://www.hondaspree.net/phpBB3/viewto ... ent#p65473

-- End preamble - mousewheels


Ok long story short, I was doing a topend and noticed a lot or crank woble, not my scooter so I thought I would try to true it. I have seen some kits for like $300 for a stand, I just made a nipple and used my vice. Let me start off by saying I did not get the desired preformance, I was able to bring the horizontal down from .16 to .08, and spec is I think about .06 (still alot in my opinion). So this method might work if you need just a tweek.

First pic is the crude nipple I made, I put a uguly bead of weld on a bolt and filed it down.
Image
Image
Instead of a $300 stand, the trusty vice
Image
Dial indicator should be on the Journal, with this method you mark the high/low spots and use a C clamp/wedge to adjust. Google "ROWE" crank adjustment and you will find some instructions, or here http://www.roweusa.com/PDF/09-1179%20%2 ... ctions.pdf

alot of patience and a brass hammer is the key, note: I never found the key, I was lacking patience-
Image
Image

Anyway, my hat is off to the ones who do this professionally, Good Luck

Also, my wife never saw me on her table, hehe
Last edited by mousewheels on Mon Feb 08, 2010 8:43 pm, edited 1 time in total.
Reason: Add preamble & links in the move to Adv Tech Docs

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tru72
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Re: Crank Tuning Setup "shadetree method" beware large pics

Post by tru72 » Sat Jan 30, 2010 7:22 am

lol its hard to do huh?
My first couple of cranks was "interesting" LOL
I jus chuck them up in a lathe with a tail stock, set up your dial indicator and go from there. Takes time and patience, I have changed a few rods and bushings and its defiantly not my favorite thing to do..
I prefer now to just buy a new crank instead haha!
good luck and keep trying!
aloha
D

veedubh20
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Re: Crank Tuning Setup "shadetree method" beware large pics

Post by veedubh20 » Sat Jan 30, 2010 9:13 am

time to replaced new crank! easy way to tell , just look at con-rod burning color,bearings

house
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Re: Crank Tuning Setup "shadetree method" beware large pics

Post by house » Sat Jan 30, 2010 3:19 pm

Yah, I would love to get a lathe, so many uses, one day!

Good tip on on the overheated rod, I diddnt catch it. I found a crank for $50 shipped, any special way to press the bearings on, or just tap. tap. tap.?

veedubh20
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Re: Crank Tuning Setup "shadetree method" beware large pics

Post by veedubh20 » Sat Jan 30, 2010 3:53 pm

Image here is the tool.

house
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Re: Crank Tuning Setup "shadetree method" beware large pics

Post by house » Mon Feb 01, 2010 1:03 pm

dang, I guess ill post on craigslist and see if someone in north Alabama has it. Oh the days of a good old chevy 350 build,

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