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160 Rear Tire on a Honda XR650R Possible?

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I got a free set of SM tires, but the Rear is a 160, and it looks like the chain will rub the tire pretty badly.  Has anyone successfully run a 160 rear on a XR650R?  If so, what did you have to do to make it work?  I could probably get the rear sprocket spaced out 1/8" using washers as shims, but I definitely don't want to do it unless Is there a way to space out the front sprocket too.  Any ideas?

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I put a 160 on my KTM, and the tire was into the chain by about 1/8", so I took my electric planer to the edge of the tire, and in about 30 seconds it fit fine

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I had one on my R some years back and it ate into the side wall pretty good, but not enough to do problem damage. FWIW

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So after reading a bit (mostly on SM Junkie), I am thinking about trying a few things.  As stated before, it will be easy to put some thin washers under the rear sprocket to push that out a bit. I may have to adjust the chain guide, but we'll see.  I am thinking of having 1/8" milled off the center portion of the front sprocket to make it ride a bit further out on the CS, so the chain will run straight.  I will then probably also need to push the chain slider out as far as it will go.   Next, I will probably make the switch to a non-O-ring chain to gain another 1/16" to 1/8".  If that isn't enough, I may consider adjusting the spokes so the rim rides 1/8" or so further to the right.  Lastly I will grind the tire if still needed. 

 

Am I forgetting anything?

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So after reading a bit (mostly on SM Junkie), I am thinking about trying a few things.  As stated before, it will be easy to put some thin washers under the rear sprocket to push that out a bit. I may have to adjust the chain guide, but we'll see.  I am thinking of having 1/8" milled off the center portion of the front sprocket to make it ride a bit further out on the CS, so the chain will run straight.  I will then probably also need to push the chain slider out as far as it will go.   Next, I will probably make the switch to a non-O-ring chain to gain another 1/16" to 1/8".  If that isn't enough, I may consider adjusting the spokes so the rim rides 1/8" or so further to the right.  Lastly I will grind the tire if still needed. 

 

Am I forgetting anything?

yes.

 

WHY???????????   What is this obsession some have with the widest tire? Phallic envy?  Mine came on the bike when I bought it and I thought it pretty silly.  It's a 300lb 45hp single for goodness sake.  You don't need the same rubber (nor can you use) as a 150hp, 450lb bike.  ;)

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The correct way is to pull the rim to the brake side for more clearance.  You probably should be running a 5 inch rim for a 160 tire.  Is this a track bike or a street bike.

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XR 650's do well with Bridgesstone 150 BT003 on the back. Many of the 160's are just too wide. The conti attack 160's are skinnier however they don't grip like the BT 003's. I would rather use a tire that grips well other than a larger size.

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yes.

 

WHY???????????   What is this obsession some have with the widest tire? Phallic envy?  Mine came on the bike when I bought it and I thought it pretty silly.  It's a 300lb 45hp single for goodness sake.  You don't need the same rubber (nor can you use) as a 150hp, 450lb bike.   ;)

No obsession, the tire was FREE.  I am replacing the sprockets and chain anyways, so getting a non-o-ring chain is a "no-brainer", and adjusting the rim to ride more to the brake side is FREE, Grinding the tire is FREE,  I will probably only move the drive over as a last resort, but I have a buddy with a Lathe & Mill, so milling the front sprocket is FREE,  Adjusting the chain slider is FREE.  Putting a few washers under the sprocket might cost me a few pennies, though.  This is just a fun project to go canyon carving, not for the track, so when I buy my next tire, I will probably opt for a 150.

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No obsession, the tire was FREE.  I am replacing the sprockets and chain anyways, so getting a non-o-ring chain is a "no-brainer", and adjusting the rim to ride more to the brake side is FREE, Grinding the tire is FREE,  I will probably only move the drive over as a last resort, but I have a buddy with a Lathe & Mill, so milling the front sprocket is FREE,  Adjusting the chain slider is FREE.  Putting a few washers under the sprocket might cost me a few pennies, though.  This is just a fun project to go canyon carving, not for the track, so when I buy my next tire, I will probably opt for a 150.

 

Sorry to lump you in with the endless parade of motard jockeys wanting the absolute biggest tire they can wedge in there.  Handling be damned.  LOL 

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Sorry to lump you in with the endless parade of motard jockeys wanting the absolute biggest tire they can wedge in there.  Handling be damned.  LOL 

 

No hard feelings here!

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I'm running a 7.5 x 19 Maxxis DTR-1 dirt track tire on mine on a 2.75" x 19 wheel and it fits.  7.5" equals 190mm, but it doesn't seem that wide.   :)

The Maxxis on the stockish size wheel really balloons and is nowhere near as wide as a street oriented 160 on a 4.25-5" rim.

 

I will say that DTR-1 hooks up like a slick.  I run one on a sportsman set up and it definitely works well.  The 21" front is the problem.  There are no decent 21" sticky fronts.

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Have you tried these Avon vintage road race tires?  They come in 21 and are quite sticky!

 

http://www.avonmoto.com/products/non-dot-race-tires/speedmaster-race

Let me rephrase.  There are some decent 21" fronts but nothing that will compare to a 16.5 front slick set up.  The front tire/wheel combo is the limiting factor on a sportsman setup.  Also I am referring to track/racing scenarios.

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I'm running a 7.5 x 19 Maxxis DTR-1 dirt track tire on mine on a 2.75" x 19 wheel and it fits.  7.5" equals 190mm, but it doesn't seem that wide.   :)

HOLY SMOKE that's a WIDE ASS TIRE on a SKINNY LITTLE RIM!!!!!!!!

Did you mount that yourself?

I can't imagine a shop mounting that setup (and assuming responsibility).

Some stretched bead there!!!!!!!!!!!!!!!!

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Yes, I mounted it myself, but...dirt track tires are much taller and more rounded than road tires and this one is meant to be mounted on a 2.15" to 3.5" wide rim.  Go to a dirt track race and check it out, it's great racing.  Here is more info on the tires, they work well for SM:

 

http://www.aaracing.com/tire_technical_information.aspx

 

HOLY SMOKE that's a WIDE ASS TIRE on a SKINNY LITTLE RIM!!!!!!!!
Did you mount that yourself?
I can't imagine a shop mounting that setup (and assuming responsibility).
Some stretched bead there!!!!!!!!!!!!!!!!

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Let me rephrase.  There are some decent 21" fronts but nothing that will compare to a 16.5 front slick set up.  The front tire/wheel combo is the limiting factor on a sportsman setup.  Also I am referring to track/racing scenarios.

 

Of course no 21 is going to work as well as a 16.5 slick, besides the compound, the smaller wheel changes the steering geometry radically!  And the tire I suggested IS a race tire, I would not have suggested it if you were looking for a street tire.

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well I just put on perelli scorpion 150.70.18 on my xr250l and have 3/4 to1" a side to go i could have goten a 160.70.18 on easaly just ran down the interstate all good gps said 120mph.

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