Author Topic: '91 front end change to '94-or-later  (Read 511 times)

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Offline John_Atkinson

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'91 front end change to '94-or-later
« on: January 12, 2016, 09:25:33 pm »
I understand from seeing other posts that the 94-and-later fork tubes will drop right into the pre-94 triple clamp.....if I am understanding correctly, this then makes the conversion to the 94-and-later just a matter of acquiring wheel, brakes and fender and bolting everything right on.

Am I close, or completely off-base?


TIA,
John
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CANADA
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'91 Concours "Zeke" - 218,000 km and counting........

Offline Stasch

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Re: '91 front end change to '94-or-later
« Reply #1 on: January 13, 2016, 12:20:14 am »
Add in the speedometer drive gear too, but you've pretty much got it.
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Offline Jorge

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Re: '91 front end change to '94-or-later
« Reply #2 on: January 13, 2016, 02:35:52 am »
Axle diameter is also different between them. Early ones have 15 mm diameter, later ones 17 mm. I believe you'd have to get at least the fork sliders, if not the whole fork setup, to accomplish the installation.
Jorge

Offline Stasch

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Re: '91 front end change to '94-or-later
« Reply #3 on: January 13, 2016, 05:06:03 am »
Jorge is right.  The triple trees / steering stem are the only common parts for all C10 years.

You can use either 86-93 or 94-06 fork legs for all C10 years but either choice only works with their corresponding 86-93 or 94-06 specific parts for:

Wheel, axle, fender, speedo drive gear, rotors, front brake system. 

You can't mix parts between the 2 generations.

Having said that, the one thing I'm not 100% certain of is if the front brake master cylinder is specific between the 2 generations from a functional point of view. 

Could also be differences in brake line lengths to the 2 gens calipers?

Safe bet is obtain entire front braking MC / lines / calipers.
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Offline Rev Ryder

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Re: '91 front end change to '94-or-later
« Reply #4 on: January 13, 2016, 05:49:21 am »
MC IS the same. Lines may be as well.
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Offline Stasch

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Re: '91 front end change to '94-or-later
« Reply #5 on: January 13, 2016, 12:34:41 pm »
Good to know. 

The MC caps and screws are different between the 2 gens, but I have wondered if there any real functional differences.

Parts fiche lists differences for 86-91 and 92-06, no idea what they are.

(interestingly its not split along the normal 86-93 and 94-06 generation lines)
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Offline CRocker

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Re: '91 front end change to '94-or-later
« Reply #6 on: January 13, 2016, 01:36:40 pm »
When I put the later model fork tubes on my '88 I used the front master cylinders interchangeably...I would have to say either would work...and, yes, it really is that simple...once you have everything in-hand... :beerchug: