EuroKClub
General forum area => Tyres => Topic started by: armstrongracer on March 01, 2021, 01:38:11 pm
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Been running PR5's for about 5 months now, mostly in winter so this weekend was the first time they could be used in anger so to speak. Thoughts:
Roll into corners really well, very neutral. Steering a bit slow but I fitted 28mm linkage plates at the weekend which helps.
Grip in rain and on greasy roads is exceptional. Not even a twitch all winter. Since everyone switched to diesel about 10 years ago Dublin roads seem to be covered in a layer of slime on cold winter mornings. My SM on Z8 Interacts was twitching & sliding everywhere. Much higher grip levels when properly wet though. K13 on PR5 doesnt do this, maybe the weight helps.
Dry grip, no issues. Still exploring this ;D
Other observations after fitting boxer design plates and doing the 18k linkage service in the process.
Surprised how low unfastening force was on the bolts, certainly less than 38NM, also no signs of loctite ever being used on the bolts. (think plates were still as factory fitted)
Bearings whilst not dry were hardly over greased. Lots of manufacturers seem to be a bit mean with bearing grease.
On K40 at least dogbone pins are really good, DLC coated. Suspension and swing arm pins are ordinary chrome.
Seals must be good, despite regular power washing no signs of corrosion on any of the needles.
28mm linkage makes it steer nicely but back end is really high and weight is pitched even more onto my wrists. Havent fitted helibars & Sargent seat yet.
I know its counter intuitive but raising the back has dramatically improved high speed stability. Mine was always prone to sidewinds and twitching when passing big trucks at speed. That seems to have gone. Maybe extra weight on front wheel helps.
Finally, I need sidestand extenders. Can only seem to find Chinese stuff, can someone recommend a reputable extender.
Thanks.
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I have Chinese on another bike. Top stuff and cheap as chips.
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Been running PR5's for about 5 months now, mostly in winter so this weekend was the first time they could be used in anger so to speak. Thoughts:
Roll into corners really well, very neutral. Steering a bit slow but I fitted 28mm linkage plates at the weekend which helps.
Grip in rain and on greasy roads is exceptional. Not even a twitch all winter. Since everyone switched to diesel about 10 years ago Dublin roads seem to be covered in a layer of slime on cold winter mornings. My SM on Z8 Interacts was twitching & sliding everywhere. Much higher grip levels when properly wet though. K13 on PR5 doesnt do this, maybe the weight helps.
Dry grip, no issues. Still exploring this ;D
Other observations after fitting boxer design plates and doing the 18k linkage service in the process.
Surprised how low unfastening force was on the bolts, certainly less than 38NM, also no signs of loctite ever being used on the bolts. (think plates were still as factory fitted)
Bearings whilst not dry were hardly over greased. Lots of manufacturers seem to be a bit mean with bearing grease.
On K40 at least dogbone pins are really good, DLC coated. Suspension and swing arm pins are ordinary chrome.
Seals must be good, despite regular power washing no signs of corrosion on any of the needles.
28mm linkage makes it steer nicely but back end is really high and weight is pitched even more onto my wrists. Havent fitted helibars & Sargent seat yet.
I know its counter intuitive but raising the back has dramatically improved high speed stability. Mine was always prone to sidewinds and twitching when passing big trucks at speed. That seems to have gone. Maybe extra weight on front wheel helps.
Finally, I need sidestand extenders. Can only seem to find Chinese stuff, can someone recommend a reputable extender.
Thanks.
I posted a similar route a while bike Dog bones were steeper as i’m Mostly two up, tyre wise started with PR5’s...never overly happy with the front and fitted a Power RS and was that pleased fitted the same on the rear, do keep a PR5 rear in stock which could go on anyone of 3 bikes if we ever become free enough to go any kind of serious distance as in south of the Pyrenees at least....just currently dreaming.....
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Cheers,
I do 1200 miles/month just on commuting so PR5's are probably the best compromise between life and grip. Just as an FYI in case I wanted more grip on the front. Can you mix Power RS front with PR5 rear?
Thanks also Phil, the Chinese ones are cheap enough to buy 2 and double stack the pucks. Looking at the pictures they've thoughtfully through drilled the mounting holes.
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Did exactly the same with Dunlop’s , Sport Smart front and Road Smart rear and had no problems with Mich’s, but use wise we are both ends of the spectrum, I haven’t worn a tyre out in years...the moment the tyre starts to square it’s gone.
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Like you I'm still dreaming of wearing my tyres out on a trip to Imola or Portamao. Maybe next year...
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What I forgot....
Side stand..never found an extender I was happy with, so got your classic oval plastic puck that you put you sidestand on dodgy ground...put it on a piece of plywood(mine is 20mmthick) bang a couple of self tappers in, then cut around it with a jigsaw then run a sander round it, and I carry that in my tank bag, must be 10 years old now...
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When I fitted the riser plates I left belly pan off pending fitment of full akro system. Planned to do it this weekend but Motogp got in the way so I put belly pan back on. I then discovered an issue: With bike sitting leant over on sidestand (no extender) the back of the pan touches the back tyre. If I put a block under the stand to match normal angle it doesnt touch but its close. When I sit on the bike it's clear but not a massive gap, about the thickness of a hand.
(https://hosting.photobucket.com/images/ah303/armstrongracer/20210328_193759.jpg)
I'd worry about it clouting coming off a big bump. Is this clearance ok to ride with, anyone with experience of riser plates?
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I'd be very wary of riding it like that. Maybe you could trim the belly pan a bit.
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Is this the same pan that gets trimmed to fit the centre stand? If so at least we have trimming precedent! And I believe there are indents or something to guide the cuts.
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What I forgot....
Side stand..never found an extender I was happy with, so got your classic oval plastic puck that you put you sidestand on dodgy ground...put it on a piece of plywood(mine is 20mmthick) bang a couple of self tappers in, then cut around it with a jigsaw then run a sander round it, and I carry that in my tank bag, must be 10 years old now...
I keep my puck in my pocket. Have tied a length of string so I just drop it on the deck and move it under the side sand and wrap the end of the string round the bar grip. Easy to pickup while astride the bike when leaving.
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Bending down to pick it up is my check on flexibility :) :) :)
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Hi Chris, I know you have done various linkage plate modifications, not sure if they were on the S model. However, have you seen the back wheel get this close to the bellypan before.
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Bending down to pick it up is my check on flexibility :) :) :)
When you get to be as old as Ron, then you'll probably forget to tie the strong to the bar, bend over to pickit up and fall on your head...
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Is this the same pan that gets trimmed to fit the centre stand? If so at least we have trimming precedent! And I believe there are indents or something to guide the cuts.
Not the same trimming needed...when correctly trimmed, the cuts can't be seen unless you get run over by a K 8)
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When I fitted the riser plates I left belly pan off pending fitment of full akro system. Planned to do it this weekend but Motogp got in the way so I put belly pan back on. I then discovered an issue: With bike sitting leant over on sidestand (no extender) the back of the pan touches the back tyre. If I put a block under the stand to match normal angle it doesnt touch but its close. When I sit on the bike it's clear but not a massive gap, about the thickness of a hand.
(https://hosting.photobucket.com/images/ah303/armstrongracer/20210328_193759.jpg)
I'd worry about it clouting coming off a big bump. Is this clearance ok to ride with, anyone with experience of riser plates?
I can't see your image (I can now and I don't like what I see) but you obviously don't have the stock belly-pan. The stock one comes nowhere near the rear tyre with over 200mm clearance at the sides, and there is no material in the centre section of the pan rearwards of the engine.
It all sounds way too dodgy for my liking and I would be getting a stock belly-pan on there before I rode it.
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Ah right you are Bri!
And yeah race, i'd suggest in focus and more photos too :P. I appreciate the block paving focus, and hope you haven't been using any non biodegradable chemicals to keep it looking so nice, but that kind of thing is for the sub-forum "Block Paving Appreciation Society" which is starting soon :D
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I'll take belly pan off tonight and take a picture, it certainly looks stock, its even got the heat shield fitted. Maybe it's a pre-K40 one (my bike is 2015 Motorsport), if geometry on later bikes is different possibly BMW changed bellypan to suit.
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I'm confused. The belly pan should be a long way from the rear wheel.
Here's a standard Motorsport one (albeit with centre stand cut-out, which doesn't make it shorter, as far as I know):
(http://www.poqit.com/bellypan.jpg)
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Been looking at photographs of standard K1300's without centre stand cut out and the back edge of the belly-pan is bloody close to the tyre.
https://drive.google.com/file/d/1B_sqegZREoy9vBfqAnXYtw_TiqocuCxu/view?usp=sharing (https://drive.google.com/file/d/1B_sqegZREoy9vBfqAnXYtw_TiqocuCxu/view?usp=sharing)
Looking at the angle of my own swinging arm its apparent how jacked up my bike is (steeper than Power Cup bikes), no wonder it steers now. Hello dremel, my old friend..
https://drive.google.com/file/d/102fQZTRMLM-ImS5FZ44btfpUIoPY18Uq/view?usp=sharing (https://drive.google.com/file/d/102fQZTRMLM-ImS5FZ44btfpUIoPY18Uq/view?usp=sharing)
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Yup - you're right, I'm wrong! :-[
I never understood what use a bellypan was anyway (other than catch the sump contents on a racebike).
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Er, yes! Talking tripe as usual.
It's so long since I was under a stock belly-pan I had forgotten how much gets discarded when you do the cuts.
So back to square one and I wouldn't ride it like that. Take a jig-saw to it and all will be well...
And Richard, you are a heathen. It's yer aesthetics and yer aerodynamics innit! And 'maybe' keeping the shite off the dog-bones. Although that never worked out well...
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And Richard, you are a heathen. It's yer aesthetics and yer aerodynamics innit! And 'maybe' keeping the shite off the dog-bones. Although that never worked out well...
Arsefetticks be buggered! I quite like the very rare K1200R Sport, i.e. half fairing, and no belly pan:
(https://mcn-images.bauersecure.com/upload/104601/images/1440x960/01bmwk1200Rsportij39-01.jpg?mode=max&quality=90&scale=down)
If there was a K1300 version, I would have bought it, and saved £100s, possibly £1000s.
I vaguely remember someone (Chris' mate?) converted a nice K1300R to wear a Sport half fairing. Sweet.
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Saw a nice metallic blue one in Dublin last year, looked epic.
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First K sport I looked at was over in Peterborough, went over to have a look cuz it was on eBay..best secondhand bike I have seen with every bell and whistle and got murdered on the bidding, week later another turned up a lot closer to home...in the car to have a look and bought it on the spot, had it 11 years or is that 12?
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And Richard, you are a heathen. It's yer aesthetics and yer aerodynamics innit! And 'maybe' keeping the shite off the dog-bones. Although that never worked out well...
Arsefetticks be buggered! I quite like the very rare K1200R Sport, i.e. half fairing, and no belly pan:
(https://mcn-images.bauersecure.com/upload/104601/images/1440x960/01bmwk1200Rsportij39-01.jpg?mode=max&quality=90&scale=down)
If there was a K1300 version, I would have bought it, and saved £100s, possibly £1000s.
I vaguely remember someone (Chris' mate?) converted a nice K1300R to wear a Sport half fairing. Sweet.
It was and he still has it.
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It was and he still has it.
Possibly not for long:
https://www.autotrader.co.uk/bike-details/202103240547053?model=K1300R
3k miles!
Lovely.
(https://m.atcdn.co.uk/a/media/w1024/2a97a796d7304d7fbcca5768cfbafd45.jpg)
The only thing I'd probably miss is the K mirrors.
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Quick text tells me he’s gone GS....takes all sorts ::) but thats a lot of motorcycle and hard work for that money.