MKII crank

  • 79MKII
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Re: MKII crank

09 Jan 2007 17:37
#104558
APE Jay wrote:
Many of the leading tool supply companies have precision ground steel rod in three foot lengths in metric sizes. Most call it drill rod.

You can get a 17 mm diameter piece for about $23.00.

This is what you use to check it the crank is in index. If it will fit thru all four rods, the crank is OK. If the crank is twisted out of index, the rod will ususllu go thru three rods, but not the last one.

Jay<br><br>Post edited by: APE Jay, at: 2006/12/25 01:02

Well, I liked this idea so much, I bought a 17mm rod from McMaster-Carr for $15.65. The problem is I can't even get it through ONE rod!!:blink: My wrist pins and the rod measure 16.98mm, so what on earth am I doing wrong? Do I need a wrist pin installation tool or something?? I though it would be a quick and easy check.:(

Post edited by: 79MKII, at: 2007/01/09 20:37
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250

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  • steell
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Re: MKII crank

09 Jan 2007 18:09
#104567
Bevel the end of the drill rod, it will make it a lot easier.
KD9JUR

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  • donthekawguy
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Re: MKII crank

09 Jan 2007 21:28
#104617
It's worth the $200 or so to have it welded and get the plate. If you really want to go crazy you can have the tranny gears cut. That way when you get bored with it you can bore it out and get bigger cams and not have to worry about the bottom end.
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1964 Yamaha 125

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Re: MKII crank

10 Jan 2007 14:08
#104788
steell wrote:
Bevel the end of the drill rod, it will make it a lot easier.

That was the first thing I tried last night...no luck:angry:

Should the piston pins push through the rods by hand?
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250

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Re: MKII crank

13 Jan 2007 06:23
#105336
79MKII wrote:
steell wrote:
Bevel the end of the drill rod, it will make it a lot easier.

That was the first thing I tried last night...no luck:angry:

Should the piston pins push through the rods by hand?

Absolutely! Without force of any kind.

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  • Jeff.Saunders
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Re: MKII crank

13 Jan 2007 09:48
#105378
With the rod I purchased a few years ago, I had to use some fine wet & dry paper on the outside to reduce the diameter very slightly - you want it snug, but not tight.
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Re: MKII crank

13 Jan 2007 09:48
#105379
With the rod I purchased a few years ago, I had to use some fine wet & dry paper on the outside to reduce the diameter very slightly - you want it snug, but not tight.
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