1983(ish) R65LS Riders, can you help me out???

[Milo_357]

Hey gang,

My efforts to transfer the dual front brakes from my 1983 R65LS to my 1982 R65 has run into a snag.

The lower fork sliders of the two bikes are exactly alike.  I mounted the second caliper with not problem.  Unfortunately, the brake discs do not seem to be lining up properly into both calipers when I mount to tire.  Looking at the wheel from the front of the bike, the left side brake disc does not fit into the left side caliper.

I have two of the shallow carrier discs on the wheel.  

The wheel IS the 19" snowflake, not the 18" from the R65LS.

The axle shafts are exactly the same between the two bikes.

R65LS riders.  Do you have extra spacers on your bikes? The wheel SEEMS to almost want one shallow and one deep carrier, but I know that is not right...

Is the 18" wheel a wider wheel???  IS this where I am failing?  How could it be wider though and use the same axle shaft...?

If anyone is willing to send me a photo of their front wheel from the front and side I'd appreciate it.  Or post it here better yet.

Any thoughts on what forest I am missing for the trees?

Thanks,

Dell

[Bob_Roller]

The 19 inch wheel, is not for an R65, most likely for an R80 or R100, whether it will work or not on an R65, I don't know .

I've got two LS's and neither of them has any spacers between the rotor and wheel .

[Milo_357]

The 19 inch wheel, is not for an R65, most likely for an R80 or R100, whether it will work or not on an R65, I don't know .

I've got two LS's and neither of them has any spacers between the rotor and wheel .

Just another thing the PO did that is screwing me up!!!  

Went and double checked.  It's definitely a 19 inch diameter wheel.  No wonder I've had problems with this conversion.  Argh!

Still, I wonder what is keeping me from having the proper width on my brake discs on the wheels...

[Bob_Roller]

I measured the front wheel on my '84 LS, forgot I have the rotors removed .

It measured 2.64 inches at the bolt holes, with one of Harbor Freight's 'finest' digital micrometer !!!!!!!!!!!!!!!

[Milo_357]

I measured the front wheel on my '84 LS, forgot I have the rotors removed .

It measured 2.64 inches at the bolt holes, with one of Harbor Freight's 'finest' digital micrometer !!!!!!!!!!!!!!!

Bob,

How long are the through bolts that hold your brake discs in place?  

Thanks!

[tvrla]

I've never measured the different dimensions of the different wheels - LS, R65 and R100 etc snowflakes. I'd imagine the snowflakes, whether 18" or 19" are the same at the hub. However, the shallow discs only work with the LS. The snowflake requires the deeper R65 rotor.

I'd imagine that a 19" snowflake will require the deeper R65 brake discs.

I also think there's enough room under the fender for the larger wheel and tire. I've seen it done and no modification were needed.

[Bob_Roller]

There are different bolt lengths for the single disc I believe they are 70 mm, I want to say 90 or 100 mm for the dual disc setup.

[Bob_Roller]

I finally found an 18 inch diameter front snowflake wheel from an '80 R65 I had in the garage, the hub thickness is 1.67 inches at the rotor bolt holes .

So a 'ballpark' figure of about 1 inch difference in thickness .

I don't know the dimension of a 19 inch wheel .

[Milo_357]

I finally found an 18 inch diameter front snowflake wheel from an '80 R65 I had in the garage, the hub thickness is 1.67 inches at the rotor bolt holes .

So a 'ballpark' figure of about 1 inch difference in thickness .

I don't know the dimension of a 19 inch wheel .

An inch difference between the 18 and 19 inch wheels?

Wow.  I had not idea.  That makes a lot of sense though. Like the IDIOT I am I got rid of the old 18 wheel before I was finished with what I was doing.  The through bolts from the R65LS wheel must be an inch or so longer than the originals from the R65 standard.

Now, the $64,000 question... Get an 18 wheel, or chuck the entire plan and sell eveything, and maybe get a 4 piston caliper to improve may braking performance?

[Bob_Roller]

I don't know what a 19 inch wheel thickness is, the 18 inch wheel has a thickness of 1.67 inches, a standard LS wheel has a thickness of 2.65 inches .

So there is a difference of about an inch between a standard 18 inch snowflake wheel and a standard LS wheel .

You need to measure your 19 inch wheel to see what dimension you get .

[Milo_357]

I've never measured the different dimensions of the different wheels - LS, R65 and R100 etc snowflakes. I'd imagine the snowflakes, whether 18" or 19" are the same at the hub. However, the shallow discs only work with the LS. The snowflake requires the deeper R65 rotor.

I'd imagine that a 19" snowflake will require the deeper R65 brake discs.

I also think there's enough room under the fender for the larger wheel and tire. I've seen it done and no modification were needed.

Oh, please don't tell me that I actually needed two of the DEEP dish carriers to pull off this conversion instead of two shallow dish... argh....

[steve hawkins]

Yep

[Milo_357]

Yep

Would it REALLY work??? I mean, do you know if it was designed that way?

[Bob_Roller]

You need to measure your 19 inch wheel and see what dimension you get for thickness .

I remember when I was replacing the OEM rotors on my '81 R65, I spent a lot of time researching the EBC catalog, part numbers for the rotors for the R100 bikes, which have 19 inch diameter snowflake wheels were different than the part numbers for the rotors for the R65 with the 18 inch snowflake wheels .

Did I mention you need to measure your 19 inch wheel, before you go any further !!!!!!!!!!!!!!!!!!!!!!!!

[Milo_357]

You need to measure your 19 inch wheel and see what dimension you get for thickness .

I remember when I was replacing the OEM rotors on my '81 R65, I spent a lot of time researching the EBC catalog, part numbers for the rotors for the R100 bikes, which have 19 inch diameter snowflake wheels were different than the part numbers for the rotors for the R65 with the 18 inch snowflake wheels .

Did I mention you need to measure your 19 inch wheel, before you go any further !!!!!!!!!!!!!!!!!!!!!!!!

Yes Sir!  

You'd think, after living a life by the seat of my pants, I'd have learned such a lesson by now.   But nope.   Maybe some day...