83 vs 90 deg. valve stem - Kawasaki ZX-10R.net
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post #1 of 26 Old 04-19-2017, 01:07 PM Thread Starter
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83 vs 90 deg. valve stem

So im gonna spring for some nice new angled valve stems and was just gonna buy the 90 deg ones but then i started reading info on how 83 deg ones change the angle which reduces the stress on the stem at ultra high speeds. Is this snake oil hype? What are the odds of failure? I may see 160 but dont plan on riding cross country at 160. Looking at Bridgeport and Moto-D. Guys have been fine with 90 deg for years, right? What say you?

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post #2 of 26 Old 04-19-2017, 01:17 PM
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90 comes stock on the gen 5. If there was really a chance of failure there's no way a manufacturer would install them.
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post #3 of 26 Old 04-19-2017, 01:27 PM Thread Starter
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lol I was sure it was just my OCD working away on me!
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post #4 of 26 Old 04-19-2017, 01:42 PM
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Yet another reason to get a Gen5! The straight valve stems on my 4th gen suuuuuck!
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post #5 of 26 Old 04-19-2017, 01:47 PM
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I have black MOTO-D 90% stems on my bikes....Plus I love there coolmax undersuit.

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post #6 of 26 Old 04-19-2017, 02:13 PM
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Love the 90's on my past bikes, never heard of the 83's myself. (0's are great and help a lot with tire pressure adjustments!

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post #7 of 26 Old 04-19-2017, 05:05 PM
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I'd get an angle less than 90, as it will be easier to hook gauges and air pumps too. That being said, i have 90's on my gsxs1000 and gen 5. Moto-d makes nice stuff. Just make sure they are metal and not plastic on the nut/ threads that attach to the rim. I have used bike master without issue as well from cycle gear.

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post #8 of 26 Old 04-19-2017, 05:46 PM
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Neat side note: Any sort of land speed sanctioning body requires metal valve stems on all bikes... 83/90 degree ones are ok by the rules thus far. :)
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post #9 of 26 Old 04-19-2017, 05:49 PM
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Just use the regular stems. Kawa has a stupid cotter key in the axle nut. End of story.
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post #10 of 26 Old 04-19-2017, 10:49 PM
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I use 90's but have them facing uphill when the bike is on side stand, there so much easier to get too

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