Crankshaft assembly question

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Red80Spider
Posts: 3
Joined: Sat Jan 23, 2021 4:05 pm

Crankshaft assembly question

Post by Red80Spider »

I am getting ready to have my crankshaft pressed together with a new connecting rod. Is there a side to side crank measurement that needs to be held? This is for a 1971 93A Super Rat. I searched the forum and didn't see anything.
Thanks,
Dave
olddogs
Posts: 404
Joined: Mon May 05, 2014 8:30 am

Re: Crankshaft assembly question

Post by olddogs »

.006 to .008. Specs can be found in the Hodakaparts.com library section.
thrownchain
Posts: 1920
Joined: Sun Jul 21, 2013 8:52 am

Re: Crankshaft assembly question

Post by thrownchain »

I think he’s looking at outside distance so it can be pressed and not be too wide or too narrow. My guy usually measures that distance before he disassembles the crank.
olddogs
Posts: 404
Joined: Mon May 05, 2014 8:30 am

Re: Crankshaft assembly question

Post by olddogs »

You may be right. He may be looking for something different. Since the crank is centered by the torque of the clutch nut pulling the crank against the right side bearing, which is locked in place by the snap ring, the correct side play of the rod is the only variable in the cranks width. If you have crank "assembly" side play somethings wrong.
Al Harpster
Posts: 308
Joined: Fri Apr 11, 2014 9:13 am

Re: Crankshaft assembly question

Post by Al Harpster »

I have the shop manual pages and specifications for this crank.

If the initial poster will email me I will email those pages and specs to him.

aharpster at copper dot net
Red80Spider
Posts: 3
Joined: Sat Jan 23, 2021 4:05 pm

Re: Crankshaft assembly question

Post by Red80Spider »

Thanks for the responses, guys. I just sent an email to Al for the scan of the shop manual. It sounds like the only dimension I need is the rod clearance between the crank halves which is .006 to .008 as old dog said. I did find it in the library.
I want to get the engine back together first and then I will start on the rest of the bike. I will probably have more in it than it is worth, but it is a neat little bike and a great retirement project. With any luck, I will have it rideable for Hodaka Days
Thanks,
Dave
viclioce
Posts: 4848
Joined: Mon Apr 21, 2014 5:35 pm
Location: Santa Fe, NM
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Re: Crankshaft assembly question

Post by viclioce »

Red80Spider wrote: Sun Jan 24, 2021 9:44 am I will probably have more in it than it is worth, but it is a neat little bike and a great retirement project. With any luck, I will have it rideable for Hodaka Days
Thanks,
Dave
We all can say that! I don’t even count my labor hours. It’s not worth the calculation. I build these bikes out of love for them & a desire to keep them alive! I’m finishing up my 9th restoration. My first Super Rat! Time to change the tires and clean the wheels! ugeek: Victor
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1978 175SL
1976 03 Wombat
1975 99 Road Toad (2)
1973 96 Dirt Squirt (2)
1973 “Wombat Combat”
1973 Combat Wombat
1972 94 Wombat (2)
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B (2)
1968 92 Ace 100
1966 Ace 90
; D Victor
Red80Spider
Posts: 3
Joined: Sat Jan 23, 2021 4:05 pm

Re: Crankshaft assembly question

Post by Red80Spider »

20200628_192552.jpg
That rat looks just like the one I have. There is hope for it!
I just finished the Wombat last summer. They will be trail bikes.
20190730_153935.jpg
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