missed shifts and oil - TwoWheelForum: Motorcycle and Sportbike forums
 
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post #1 of 14 (permalink) Old 11-28-2007, 02:06 PM Thread Starter
 
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missed shifts and oil

gotta couple questions.

i seem to miss a lot of shifts, esp at high rpm and it sometimes comes out of 2nd gear under WOT (not a nice feeling). any ideas or quick fixes (2000 kaw zr7)? it's the old gpz aircooled engine.

also, i used an oil with friction modifiers (m1 5w-30). i have no clutch slip in any gear or rpm, but am noticing that the clutch take-up is not optimal. it doesn't like hard launches. i plan on a change to an oil without the FMs soon (delvac1 15w-40). does anyone know if the FMs get absorbed into the clutch pack or will they eventually flush out? any idea how long that might take?


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post #2 of 14 (permalink) Old 11-28-2007, 02:26 PM
 
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first of all, 5W30 is WAY too light for anything in todays world. you need a 10W30 minimum for motorcycle applications. 40 is better.

on the shifts, its likely a need to practice them more than anything.
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post #3 of 14 (permalink) Old 11-28-2007, 02:55 PM Thread Starter
 
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no doubt. i had some synthetic 5w-30 laying around from the cars and didn't realized that the FMs were an issue for the clutch until afterward. i assumed it was close enough to the kaw recommended 10w-40 cager dino oil. i also didn't fully consider the shearing in the gearbox. i will be going to 15w-40. does the FMs go away with the change or do they absorb into the clutch?

i don't believe the missed shifts are technique related. i always use the clutch and match revs whether up or downshifting when riding hard. sometimes, i let clutch pull the engine up to speed on easy 3rd-2nd or 2nd-1st shifts just to hear the exhaust pop and crackle. it seems that high rpm downshifts get pushed back out and it pops out of 2nd while i'm already accelerating hard in 2nd. lovely feeling having the tank and handlebars take the wind of of ya. is there any shifter alignment or otherwise that could be causing this?
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post #4 of 14 (permalink) Old 11-28-2007, 03:45 PM
 
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its probably got to do wtih the oil, and I think the friction modifiers will flush out in time.
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post #5 of 14 (permalink) Old 11-28-2007, 04:10 PM Thread Starter
 
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its probably got to do wtih the oil, and I think the friction modifiers will flush out in time.
wow. i never thought about that. looks like i'm moving the change up a few miles. i've been messing with the mixture, exhaust, and intake since the last oil change. i was thinking the shifts were power related, but they might be oil related. it may have started around that time.

thanks.
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post #6 of 14 (permalink) Old 11-28-2007, 05:21 PM
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Hey dude, im not genious, but in my 99 zx7 i always used regular 15w40 SUV 4x4 i think castrol syntec and it worked great not to mention its cheaper!
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post #7 of 14 (permalink) Old 11-28-2007, 05:35 PM Thread Starter
 
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Hey dude, im not genious, but in my 99 zx7 i always used regular 15w40 SUV 4x4 i think castrol syntec and it worked great not to mention its cheaper!
yeah, i'm the idiot for dumping in M1 5w-30. got too da** excited about getting to do the oil change.

i won't be paying $7/qt for m/c oil either that is mostly the same by analysis. i thinkg synthetic is important for the aircooler engine. delvac1 is cheap at WalFart and has more additives than auto Mobil1. it will be 15w-40.

the manual quotes standard cager SAE SE or higher dino oils.

were the 99s aircooled? i know the zr7 uses a lot of mid90s zx7 parts. i had dreams of an 05 or 06 z750s, but there are no side hard bags option for it, only a top case.

looks like the next bike will be an fz1 or similar. i like the new bmw f 800 since it has a belt drive, but $10k is crazy.
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post #8 of 14 (permalink) Old 11-28-2007, 05:42 PM
 
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I just use the walmart brand 15W40 oil in every change. ALWAYS works fine for me.
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post #9 of 14 (permalink) Old 11-28-2007, 06:17 PM
 
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I just use the walmart brand 15W40 oil in every change. ALWAYS works fine for me.
Aren't you supposed to use motorcycle oil?
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post #10 of 14 (permalink) Old 11-28-2007, 06:40 PM
 
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Aren't you supposed to use motorcycle oil?
no... just the oils that meet manufacturer specs

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post #11 of 14 (permalink) Old 11-28-2007, 06:46 PM
 
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No chit so I can use regular car oil and it wont affect my clutch.
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post #12 of 14 (permalink) Old 11-28-2007, 07:47 PM
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No chit so I can use regular car oil and it wont affect my clutch.
ONLY if it has the same additives as moto oil. Look on the back of your bottle, and in the manual. Should have a circle with a lot of greek on it- for example:

API SE,SF or SG
API SH, SJ with JASO MA
SAE 10w40

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All riders take risks- what you wear usually reflects your respect for the bike and general knowledge of riding.
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post #13 of 14 (permalink) Old 11-28-2007, 07:59 PM
 
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Solly Charlie, but oil vis or adds will not have an effect of popping out of gear under load...that is a function of a rounded-off gear dog or incorrect indexing of the shift drum...I had a ZX7r with a weak return spring...replace the spring, drum indexes properly and voila'...no more popping out of gear. But first, make certain your chain is adjusted properly...loose chains can cause sloppy shifting, which can cause the problem you are having.

But get that crap out of your cranckcase anyway...you will develop clutch slip with FM in your oil.
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post #14 of 14 (permalink) Old 11-28-2007, 10:27 PM Thread Starter
 
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Solly Charlie, but oil vis or adds will not have an effect of popping out of gear under load...that is a function of a rounded-off gear dog or incorrect indexing of the shift drum...I had a ZX7r with a weak return spring...replace the spring, drum indexes properly and voila'...no more popping out of gear. But first, make certain your chain is adjusted properly...loose chains can cause sloppy shifting, which can cause the problem you are having.

But get that crap out of your cranckcase anyway...you will develop clutch slip with FM in your oil.
shibby. i'm in spec for the chain (1.2in - 1.4in slack). i do have one stubborn link, but . . . i think i'll be digging into that monster come spring. kinda frustrating since it gets stored inside and lubed every couple weeks.

we're would you get a stronger return spring? most upgrades for this bike are usually available with a drill or hacksaw. is it a pita to swap out?

the oil will be out either as soon as the christmas lights are up or over the christmas vacation.

thanks
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