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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: cbluez on February 26, 2015, 08:01:01 PM
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I know this is an old topic, but after some 4 hrs of searching and rereading 'many' K bike sites about Radial tires for the K75S, all the info seems to be old.
The tires they be a changing.
For the Y spoke rims the consensus 2 or more years ago was the BT023/110/80/18 for the front and the Avon AV46 140/18/17 for the rear because of it's being able to fit that narrower rim. A nice combination apparently.
After some online shopping it seems the BT023 is easy to get, the Avon not so much, although I did find one...it looks like that tire is discontinued.
My question is, has anyone been using more 'updated' ie: not discontinued radials for the rear that work on the Y Spoke and would be nice for spirited riding in the mountains.
Currently have Spitfires on there that came with the bike when I bought it..Unless something else is wrong with the K bike's handling, I don't like them..But then this is my first K bike.
As an aside, I have considered another set of Pirelli Sport Demon bias units, as I quite like them on my old Guzzi 1000 SP...and they are actually available for our K75S sizes..
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http://www.revzilla.com/product/avon-av46-st-rear-tires
Looks to me like the AV46 is alive and well...no?
That said, I'm also interested to hear if there are any more recent experiences.
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Yes the Avon is still available...(only one that fits that 2.75 inch wheel that I could find)
I just bought one and a Bridgestone Battlax T-30 for the front..From Jake Wilson, cheaper than Motorcycle Superstore, and were Fedex-ed an hour after the order!
A friend of mine who rides like a professional says the T-30 is way superior than the ol 023 model..so I went with that. :riding:
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Shinko 712's... great tire. Use them on my 75s and a cb750 I beat on. Grippy in the turns and long lasting.
$0.02
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Shinko 712's... great tire. Use them on my 75s and a cb750 I beat on. Grippy in the turns and long lasting.
$0.02
+1 712s...
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my recently acquired K5s came with a new set of Pirelli SD. I really like them, but I really don't have anything to compare them to.
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I'll be putting the pirelli sport demons on my new to me k75. I have them on my '89 yamaha FJ1200 and really like them. They grip well in dry and wet conditions. They seem wear reasonably well for me, but I had to replace my front due to a puncture.
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http://www.revzilla.com/product/avon-av46-st-rear-tires
Looks to me like the AV46 is alive and well...no?
That said, I'm also interested to hear if there are any more recent experiences.
No. Very much dead. Avon stopped making them.
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Those Avons still out of stock at Revzilla. I hate the Metzeler Laser on my K75. Really scary if you want to take a corner even a little bit fast :bird
I hate this kind of problem: inability to access current tire technology due to rim size!
Is there a wider rim that can be fitted to our k-bike to solve the problem?
fastcar
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When I looked up rear tires recently for my K75C Motorcycle Superstore had a Continental radial listed. I didn't see one listed for the front size I entered but that could likely be changed a little
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When I looked up rear tires recently for my K75C Motorcycle Superstore had a Continental radial listed. I didn't see one listed for the front size I entered but that could likely be changed a little
Thanks F14,
When I went to Continental's fitment guide (http://www.conti-fitmentguide.com) all I could find was a bias ply in 18. They didn't seem to have a way to search for tires by size.
What about using a lower profile radial like 140/70-17 or 150/70-17? Is anyone doing that?
fastcar
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http://www.revzilla.com/motorcycle/continental-classic-attack-vintage-radial-tires
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http://www.revzilla.com/motorcycle/continental-classic-attack-vintage-radial-tires
Hi F14CRAZY,
When I hit the link and saw the tires, that really got my hopes up! When I went to the size selector, I found most were unavailable and no 17 inch tires at all. You'd think it would really makes sense for someone to make these sizes in a radial for the tens of thousands of older bikes out there with small rim widths.
fastcar
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greetings...
what year is this s motobrick... is it 3 spoke or snowflake wheels... what are the oem tior sizes...
j o
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greetings… what year is this s motobrick... is it 3 spoke or snowflake wheels... what are the oem tior sizes… j o
Hi Jo,
While I think cbluez found the last radial tire on the planet (Avon) to solve his problem, I'm still looking. I have a 92 K75. My understanding is that it has a 2.75" rear wheel width. Currently it has a Metzeler LaserTec 130/90-17 that is so old the sidewalls are cracked up.
Starting to look like I may have to go with Pirelli Sport Demons Bias Plies. Oh well…
fastcar
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https://www.conti-online.com/www/motorcycle_de_en/themes/motorcycletires/conti_classic_en/classic_attack_en.html (https://www.conti-online.com/www/motorcycle_de_en/themes/motorcycletires/conti_classic_en/classic_attack_en.html)
If it helps here's Continental's site on them. Would be nice if they expanded the sizes offered
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https://www.conti-online.com/www/motorcycle_de_en/themes/motorcycletires/conti_classic_en/classic_attack_en.html (https://www.conti-online.com/www/motorcycle_de_en/themes/motorcycletires/conti_classic_en/classic_attack_en.html)
If it helps here's Continental's site on them. Would be nice if they expanded the sizes offered
finding fronts isn't as much a problem. It's finding 17 inch rears that will fit a narrow rim width. What is needed is something like a 140 80 17 REAR tire. I believe that size can be found in FRONT tires by many manufacturers. A narrow 17 inch rear fitting radial looks to be impossible to find…
fastcar
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Hope I'm not hijacking this thread...
As I understand it radials will handle better than bias. Do you think these Continentals would last longer?
Continental produces that ClassicAttack in a 120-90-18 rear which is what I have on my K75C (woo hoo rear drum) and they make a 90-90-18 front. I currently run a 100-90-18 front. Any drawbacks to the smaller size? That's just a notch narrower, right?
My riding skill doesn't seem to exceed the Dunlop D404s I run and they seem to be a decent tire otherwise (fine in the rain, don't see to follow grooves or patches much) but lasting longer would be nice. My last rear 404 went about 8k miles though this one may go longer since it isn't rubbing the bottomside of the fender as it did with the blown oem shock I had on last season.
Continental's site seems to indicate they're multi-compound for wear/grip, and I don't think the D404s are.
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Fwiw, after I was done banging my head against the wall, I just went and bought Bridgestone bt-45 rear and bt-023 for front.
fastcar
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Fwiw, after I was done banging my head against the wall, I just went and bought Bridgestone bt-45 rear and bt-023 for front.
That is exactly what I did too.
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this is what i put on the brickus turkus... 100% yeeeehaaaaa...
110 80 zr 18 t30f... 150 70 zr 17 t30r...
(http://i1130.photobucket.com/albums/m528/eturkus1/K75S%201st%20Service%20at%20Liors%20Moto%20Ride/IMG_9621.jpg)
j o
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That is exactly what I did too.
And… ???
fastcar
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this is what i put on the brickus turkus... 100% yeeeehaaaaa...
110 80 zr 18 t30f... 150 70 zr 17 t30r...
j o
Didn't know you could fit a 150 on the back. How do you like it?
fastcar
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im not saying it will fit on the back...
thats the reason i asked what year is this s motobrick... is it 3 spoke or snowflake wheels... what are the oem tior sizes...
what i am saying is thats what i put on the brickus turkus... and it was 100% yeeeehaaaa...
(http://i1130.photobucket.com/albums/m528/eturkus1/K75S%201st%20Service%20at%20Liors%20Moto%20Ride/IMG_9636.jpg)
(http://i1130.photobucket.com/albums/m528/eturkus1/K75S%201st%20Service%20at%20Liors%20Moto%20Ride/IMG_9640.jpg)
j o
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Once again the Turkus can fly, radials are the ticket!!! Ticket to YEEEEEHAAAWWWW
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this is what i put on the brickus turkus... 100% yeeeehaaaaa...
+1 on the T30's. I fitted those exact same tires to my K75 and the Yeehhhaaa-factor skyrocketed. BTW, I'm running a K1100 frontend and K1100LT backend, fitted with 3-spoke rims, which is why this works for me.
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If that 110 front will fit I think I'll try the Continentals next time
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How do the T30's compare to the BTs? I have the snowflake wheels, so no T30's for me... :musicboohoo:
...but then again, I love the snowflake rims... :neener:
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It looks like the Michelin Anakee III would fit as they list it even fitting a 1985 K100RS which have the narrower Y spoke wheels. The tire is a dual sport tire but looks like about 90% street.
https://www.denniskirk.com/michelin/rear-anakee-iii-140-80hr-17-blackwall-tire.p643592.prd/643592.sku
Maybe some Motobricker has tried it. I plan on trying the Anakee 3 soon.
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I used to run Anakees on my 2000 Tiger. No complaints whatsoever.
I never thought of putting them on a K-bike. If you do this, please update this list after you get some miles on them.
Tom
It looks like the Michelin Anakee III would fit as the list it even fitting a 1985 K100RS which have the narrower Y spoke wheels. The tire is a dual sport tire but looks like about 90% street.
https://www.denniskirk.com/michelin/rear-anakee-iii-140-80hr-17-blackwall-tire.p643592.prd/643592.sku
Maybe some Motobricker has tried it. I plan on trying the Anakee 3 soon.
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Just did a search for a friend with the old snowflake rims. He has Dunlop D205 radials mounted on it and has enjoyed how they handled.
I know, most say don't spoon radials onto the older rims, but he has been happy and wants radials again. Also, not able to convince him to move to newer rims.
Now, the problem is that the D205's are no longer available in the correct size. (Looks like they may be discontinued, but don't quote me. Just could only find them in one size.)
As already noted, the Azaro's are discontinued.
What I found is that the Metzeler Z6 front 110/80-18 front looks like it would work well with the Bridgestone Battle Wing rears.
Both are radials and can carry the weight, "What do you guys think?
Freelancer
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I have been running Shinko 712's on my K75S as mentioned earlier in this thread. HR speed rated instead of VR as recommended by BMW but I have only ridden as fast as about 110 mph indicated. It is an inexpensive tire that lasts and performs well. I run them on my old airheads as well.
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I do not think the Shinko 712 is a radial.
Bikebandit has them listed as bias ply.
http://www.bikebandit.com/tires-tubes/motorcycle-tires/shinko-712-motorcycle-tire
I could be wrong though.
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Alas, they are not radials. My bad.
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It seems a fruitless hope, but has anyone compiled a list of all the tires which can currently be put on the 75's snowflake rims?
I was hoping to try the new version of Metzeler's Marathons (the newest version is the 888), but it seems that the Metzeler site states that the only tires they have that'll fit are their Lasertecs, which are quite sticky, but I've heard people complain that they wear very quickly (as low as 3000kms according to the worst-case reviews).
So far, here's what the list appears to be:
Metzeler
Lasertec
Bridgestone
BT45 (Rear is - BT45V)
Dunlop
D404
Shinko
230 Tour Master (these, uh... well, they look kind of cheap. And they are cheap.)
Pirelli's site lists no current tires as a match.
Trying to see how these tires stack up - they're all pretty close in price. Still wondering if anyone here has tried both the T30s and BTs... ?
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Amazon had the Avon Azaro ST 140/70r-17 $152.00 - 178.00 (approx) when I last looked about a month ago. Also some new ones on Ebay. The Avon Storm 2 110/80-18 should fit the front and can be found at most of the major online stores and dealers selling avon.
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I know they're not radials but has any one tried the Michelin Pilot Activ?
I've had two Bridgestone BT 45 rear tires develop deep cracks in the grooves at around 3K miles, so although they provided a good ride & handling on my K75S I've gone back to Lazertechs.
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A basic question from a newb:
For those of you who buy tires online, do you mount them yourself or take them to a shop for mounting? If the former, do you balance them yourself, too?
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Over the years I have fitted many tubed tyres, but only recently tried fitting tubeless (I didn't think I'd be able to break the bead or get them to seat). I made a bead breaker from two pieces of wood, one long and one short. They came from next door's old back gate jambs (after it had been replaced, of course). The short one is hinged on the long one and has a 45 degree angled end. Hook the long one under a fence cross piece - or a car - and away you go. Spraying a bit of 'Mr Muscle' window cleaner on the tyre bead makes the job surprisingly easy. YouTube was very helpful here.
On my K100, I fitted both tyres using only short levers and seated them with a foot pump, again using the window cleaner as lubrication. The rear popped out at only 22 psi, the front took a bit more. Both now have metal tyre valves.
As for balance, I checked the front on the bike without the calipers attached and it seemed fine (no heavy spots). I didn't bother with the rear - if I have any problems I've found a cheap source of tyre balancing beads in the UK. The only other tubeless tyre I've fitted - a front on a Triumph Sprint 955 - was balanced using the above method and was fine at speeds up to, er, the UK National Speed Limit.
Since I got old(er), I do prefer doing as many jobs on the bike as I can. When I can afford the gear, I also hope to learn to weld.
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I have been running Shinko 712's on my K75S as mentioned earlier in this thread. HR speed rated instead of VR as recommended by BMW but I have only ridden as fast as about 110 mph indicated. It is an inexpensive tire that lasts and performs well. I run them on my old airheads as well.
Speed ratings are over rated. The max H, V, Z etc. speeds are based on "sustained" speeds for 30 minutes. Even if you have a Z rated tire, chances are you will not sustain its top speed rated speed for 30 minutes; therefore, a HR tire rated for 110 mph, doesn't mean that's the limit. It means you shouldn't sustain speeds above 110 for 30 minutes. I now how hard it is to keep a K75 under that, so you'll have to show some restrain.
I wonder how a radial ply tire would feel when built to such high aspect ratios as found on bias ply's that will fit snowflake K75 rims, rear drum. My guess is they would feel squirmy considering the side walls have far fewer plys in them compared to stiff walled bias ply. Radials may not be a better tire for a bike with narrow rims, that calls for a tall side-walled tire.
I'm running H rated D 404's and they are far better handling than the slippery V rated Metz Lazertecs. (except for smoothness at 80 mph) If I can find the Shinko 712's, I'll give them a try next.
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I know they're not radials but has any one tried the Michelin Pilot Activ?
I've had two Bridgestone BT 45 rear tires develop deep cracks in the grooves at around 3K miles, so although they provided a good ride & handling on my K75S I've gone back to Lazertechs.
How old were they when they started cracking?
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I know they're not radials but has any one tried the Michelin Pilot Activ?
I've had two Bridgestone BT 45 rear tires develop deep cracks in the grooves at around 3K miles, so although they provided a good ride & handling on my K75S I've gone back to Lazertechs.
How old were they when they started cracking?
My D404's have been cracking after about 6 weeks
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Mongrel, I'll have to check my records to verify the exact time but I know it was within one season. That is they hadn't been on the bike through a winter.
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Oh, I don't think you need to check records then. I was more interested in if it was something like 3 years vs 5.
By the way, both of you, why would you not contact the manufacturer with cracking after only one year? I'd raise hell sideways if I got a batch of crap tires like that.
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My D404's have been cracking after about 6 weeks
How old were they when you bought them? Maybe you were sold new old stock. What's was "born on" date on the sidewall? When did you buy/mount them? What about air pressure? What about riding conditions? So many variables, but I'd be pissed to see cracks anywhere on new and fresh tires after 6 weeks. You should replace them if the rubber is cracking IMO.
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The link for avon in ebay:
http://www.ebay.com/itm/140-80ZR-17-69W-Avon-AV46-Azaro-Rear-Motorcycle-Tire-/271738372900?hash=item3f44de8324&vxp=mtr
The price is expensive now since it's been discontinued.
http://www.amazon.com/gp/offer-listing/B000GRP00W/ref=sr_1_1_olp?s=automotive&ie=UTF8&qid=1433515577&sr=1-1&keywords=azaro&condition=new
Some stores jacked up the price for the rear tire.
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My D404's have been cracking after about 6 weeks
How old were they when you bought them? Maybe you were sold new old stock. What's was "born on" date on the sidewall? When did you buy/mount them? What about air pressure? What about riding conditions? So many variables, but I'd be pissed to see cracks anywhere on new and fresh tires after 6 weeks. You should replace them if the rubber is cracking IMO.
Checking the production date makes them about 4 years old...Dunlop warranties their tires for 5 years from that date, if that matters. I bought them from Village Motorsports, a non-BMW powersports dealer in Holland, MI. Pressures have always been at the max on the sidewall (41) or very close to it. I think I rode for a couple days at 36. Most all freeway slab at 75-80 mph.
I already had one replaced for free by them. At this point I've ran them long enough for the tread to be at the point where they might not replace it again. And I haven't had much time to go and have them replace it, again. And I want to switch to something else that doesn't develop cracks. My skill has increased to the point where the D404's are a limiting factor.
It's a shame because they're a pretty good tire otherwise and they're cheap. Sell for $94 or so (plus mounting/balancing)
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Hey guys and gals,
My friend, Dave, just got back to me on the tires we fitted on his k100rt. I say we because the radials he had are no longer in production and asked me to help find something that might suit him.
We put a Metzeler z6 110/80 18 on the front and a Bridgestone Battle Wing 140/80 r17 on the rear. The Battle Wing is an adventure tire that is 90% road. We went this route because the tread and profiles seemed to compliment each other.
At first the Metzeler felt floaty until I informed him that the Metz Z6's are like the Pirelli Angels in that they like to be near max pressure (41psi).
Once Dave got them at the right pressure, he says they started handling great. Also says that the bike behaves much better on the dirt and gravel roads he travels when visiting friends.
So, as of now, this combo is getting two big thumbs up. :2thumbup:
Will keep you guys posted on the long term results. Dave likes to ride fast through the curves and likes to ride far. This means he will likely use them up by winter.
Later,
Freelancer
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October...after riding these 2 tires since the spring, I am just blown away!..It still is not quite up to par with the Guzzi handling, but it's awesome! Fear in the endless curves where I live is gone..It won't match a modern sportbike, but the radials put the fun back into this K75s..No more bias ply tires for this fellow.
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Do radials last longer than bias?
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Cbluez, So what tires did you wind up with? How many miles on them, and how do they look? What year is your S? Did you have to do anything to make them fit or were they a straightforward mount up?
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im not saying it will fit on the back...
thats the reason i asked what year is this s motobrick... is it 3 spoke or snowflake wheels... what are the oem tior sizes...
what i am saying is thats what i put on the brickus turkus... and it was 100% yeeeehaaaa...
(http://i1130.photobucket.com/albums/m528/eturkus1/K75S%201st%20Service%20at%20Liors%20Moto%20Ride/IMG_9636.jpg)
(http://i1130.photobucket.com/albums/m528/eturkus1/K75S%201st%20Service%20at%20Liors%20Moto%20Ride/IMG_9640.jpg)
j o
hello i have a k75s 1992 ABS stock with the 3 Spoke wheel
My rear tyre's Dunlop Streetsmart ( 130/90R17 68 V rear and 100/90R18 56 V front) is almost done.
My stock wheel is a 3" (3.0x17, ref: 36 31 2 311 887 ) , my shock EMC come with a bigger spring than the stock,
Somebody know if i could use the BT 30 that Johnny was showing in 150 70 zr 17 t30r and 110 80 zr 18 for rear and front without mod ?
Many thanks
(https://www.tacomaworld.com/data/tirecalc/imagestats/130x90xR17-150x70xR17.png) (https://www.tacomaworld.com/tirecalc?tires=130-90r17-150-70r17)
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I'm running Bridgestone T30 Battlax 150/70ZR-17 on a 3x17 3-spoke rear rim, and Bridgestone T30 Battlax 110/80ZR-18 on a 2.5x18 3 spoke front rim on my K75. Mind you, I converted my suspension both front and back to a K1100 fork with K1100 transmission, centrestand and Paralever backend. I don't have interference with either the centrestand, swingarm or the shock with this setup. I think you are getting pretty close to the rear swingarm with the standard Monolever backend, so you may have to space the wheel out a little. Check for clearance on the centrestand as well.
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Thank you RBM for your answer
Seems there is a real limited space with the stock monolever swingarm, i took a quick look to my rear wheel , and 0,40 inches ( 1 cm) is a little less than the free space between my shock spring and the dunlop streesmart 130 that i have..( i didnt check yet the space with the monolever)
Does anyone have already test with or without a spacer with a stock k75?
Dont really like the idea of a none align rear wheel with the front wheel.
Feel i will stay with dia tyre :dunno but last picture of Johnny motobrick seems prouve that it should fit with a monolver swingarm and standard shock spring ( maybe with a spacer ?)
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greetings...
i had to refresh my knee pucks and getts new elbow pucks with that setup... it was 100% yeeeehaaaaaa...
j o