Thread: Have you indexed a Fuji crank?
08-18-2011, 08:22 AM #1
Have you indexed a Fuji crank?
I would like to talk to someone who has hands-on experience indexing a Fuji crank.
This is for the SurfJet project, but its just a small Fuji twin motor, 255cc.
If you wouldn't mind answering some questions by telephone, can you email your phone number to me?
08-18-2011, 09:38 AM #2
I guess I need to be more clear. I have checked my crank index, and have found it to be out by 9 degrees.
My regular crank guy isn't returning my calls. (I'm hoping he is on vacation and not out of business!) I certainly don't have the patience to send it off to Northerncrankshaft and wait 2 months for it!
I would like to talk with someone who has corrected an out-of-index crank.
08-18-2011, 03:31 PM #3
Send it to Dan from Indyspecialty, in Minnesota. He knows Polarii inside and out and does a great job. His number is 651-388-9045. Only way to reindex it is to press it apart, get the index correct, and press it back. There was a guy on here who did it himself..I just forget his name...He's from MI.
08-18-2011, 07:50 PM #4
- Join Date
- Oct 2006
- Cleveland OH
Hayabusa has doddled with the Fuji cranks.
08-19-2011, 07:12 AM #5
08-19-2011, 04:26 PM #6
08-19-2011, 05:25 PM #7
I thought he checked phase, but perhaps not? I know it's difficult to check in these cranks without pistons and cylinders, and a lot of time.
That's what I've been wondering, can I support this thing in v blocks, give it a good whack or 2, and expect the phase to come back around? Or put it in the case and give it a few whacks?
Doing a little quick math I see that I need to move the outside of the web .26" 9/360 x 10 9/16".... It doesn't sound like a lot until you scribe the lines on the web!
08-19-2011, 06:57 PM #8
9 degrees is huge. how did you check it. IMO, the best way to check crank phase/timing is in the case with pistons and cylinders installed. Degree wheel on the crank, dial gauge into the bore. Rotate piston 1 to TDC, zero degree wheel. Dial gauge into the other bore and rotate #2 to TDC, degree wheel should be 180. If it's not, then the crank needs to be taken apart down to the center, reindexed and put back together. You CAN'T fix it any other way.
08-19-2011, 07:24 PM #9
Wolf, yes, I checked it pretty much exactly as you described. The only thing was, I gutted a spark plug, drilled out the center large enough to hold my dial indicator, threaded and installed a setscrew to hold the dial indicator.
08-19-2011, 08:51 PM #10
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