i got a nail in my new shinko - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 22 (permalink) Old 11-02-2012, 05:51 PM Thread Starter
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i got a nail in my new shinko

noticed my tire was low today and found a nail in my new back shinko i plugged it for now and trimmed the plug down flush with the tread but now that its back up to 38psi where i was originally running it the rear end feels slippery

i guess what i am asking is can riding on low pressure cause the tire to get slick and only show once getting the pressure back up to par?

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post #2 of 22 (permalink) Old 11-02-2012, 06:56 PM
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Quote:
Originally Posted by new rider 9984 View Post
noticed my tire was low today and found a nail in my new back shinko i plugged it for now and trimmed the plug down flush with the tread but now that its back up to 38psi where i was originally running it the rear end feels slippery

i guess what i am asking is can riding on low pressure cause the tire to get slick and only show once getting the pressure back up to par?
It shouldn't. Question here is how low was it and for how long?

Abnormal wear can however destroy how your tire behaves. "Slick" might be your word for a tire that no longer runs evenly.

Part can be due to you being used to the lower pressure and not with th correct pressure. If the profile was altered by improper wear, it might just not feel the way it should.

My take on this is if you're not confident with the tire you need to replace it.

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post #3 of 22 (permalink) Old 11-02-2012, 07:01 PM
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How long was it low like that? Too little pressure will cause the tire to wear more on the edges of the tread than usual, but I would think it would have to be that way for a while before it would cause a lot of issues. Does it fell slippery just in turns? If it was low for a while you may have gotten used to it actually feeling sluggish from being flat and now that it is back to the correct pressure it feels more slippery. Just a thought.

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post #4 of 22 (permalink) Old 11-02-2012, 08:38 PM Thread Starter
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well it turns out that it has had the nail in it for a while now that i think on it i thought it was the weather change and cooler temps causing the tire to be low i just kept airing it up

i have plenty of trust in the plug and it is keeping pressure so the leak is fixed

its only slippery in the turns at low speed and not as slippery with my old lady on the back i figure the extra weight gives it more grip

all day today i have been slowly pushing the bike a little more in the slow turns and if i push too hard she feels a bit unstable but either i am getting used to it or the tire is coming back to me

anyone think a good tire spin in soft sand might help it out?
i am hoping to go to the lone star rally in galveston tommorow

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post #5 of 22 (permalink) Old 11-02-2012, 09:45 PM
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Umm, I gotta ask, did you check the front tire lately?

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post #6 of 22 (permalink) Old 11-02-2012, 09:50 PM Thread Starter
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yup its an even newer shinko 712 holding 38 psi cold and around 40 hot

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post #7 of 22 (permalink) Old 11-03-2012, 12:01 PM
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Originally Posted by new rider 9984 View Post
yup its an even newer shinko 712 holding 38 psi cold and around 40 hot
Guess I have to ask where you are getting the tire pressures you have been using. 38psi sounds high to me but I don't know what's reccomended for that tire.

Spinning the tire in sand just sounds real silly to me, what would this accomplish?

I'd suggest just riding the bike, taking it easier in turns and hopefuly the tire will "wear back" abit.

Photos would have helped here. You really didn't answer the questions - how low and how long? (And by "long" we mean miles here not months)

Personally I'm not a fan of Shinko tires, but folks here seem to like them....

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post #8 of 22 (permalink) Old 11-03-2012, 03:47 PM Thread Starter
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sorry km lets see if i can answer them questions for ya guess im an idiot lol

max cold psi is 42 on these tires i figured 38 would be good and it feels ok however i am now thinking of dropping to 35

it was a little low for a good while about 500 miles i ride her every day so i dont think to check the tires every time i actually watch the tach for tire pressure for example when i am running 38 in the rear i am at 5k rpm at 70mph but i noticed one day that at 70mph i was at 5.5k rpm at first i thought i was bucking wind then i saw the flags over the car dealers blowing my the same way i was riding so i stopped and checked the pressure i was at 25 psi so i aired it up to 38 psi i only seemed to notice this on cold days but then the other day i had aired it up and parked it at the house five hours later i went for a ride and felt the sluggish feeling so i checked and it was at 20 psi thats when i found the nail and plugged it now it is holding 38psi again so to sum it all up i would guess i rode it between 20 and 30 psi for a good 500 miles

also i noticed that the tread seems to be cupping like a car tire does with a bad castor or camber adjustment

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i got my helmet but it sure makes licking the windows a chore

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post #9 of 22 (permalink) Old 11-03-2012, 08:04 PM
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Any bike tire over 32 cold seems high to me...too much pressure will cause the tire not to "give and bend" and conform to the surface...the higher the pressure, the smaller the tire's footprint....try lowering it some...



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post #10 of 22 (permalink) Old 11-04-2012, 01:18 AM
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I'm with the Wolfman... try 32 or even 30 if you are a light weight and ride solo a lot. And give 28-30 in the front a try.

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