A few questions about my K9 1k - GSXR.com
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post #1 of 8 (permalink) Old 04-11-2019, 04:18 AM Thread Starter
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A few questions about my K9 1k

So I love my K9 1000. Handles great, throttle is smooth and extremely responsive, and the bike is insanely fast. My main concern is I feel it is lacking a little in the brake department. Was thinking of going with SS lines, maybe brembos as well?

Also though the chain and sprockets are fine right now, I was considering switching to aluminum 520. Don't get me wrong the bike is faster than I can ride it, but I wouldn't mind a little more power in some areas. How noticeable do you think the increase in power will be by lightening the rotating mass? Also maybe go up a tooth in the rear since the acceleration in the lower gears is already insane, anyone have any experience? That's just a thought I'm fine with stock gearing.

Last but not least what other performance mods would you guys recommend? Has power commander 5, k&n filter, and full yoshi. And before anyone recommends it, I'm already taking another course this year! Thanks.
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post #2 of 8 (permalink) Old 04-11-2019, 05:24 AM
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Quote:
Originally Posted by Jon Willette View Post
So I love my K9 1000. Handles great, throttle is smooth and extremely responsive, and the bike is insanely fast. My main concern is I feel it is lacking a little in the brake department. Was thinking of going with SS lines, maybe brembos as well?
If you still have the stock brake lines, the SS lines are a nice upgrade which may make the lever a little firmer and easier to modulate. Personally, I did not see much change on my track bike when I changed to them but maybe my OEM lines were still in pretty decent shape.

Before spending any big money, try some aftermarket brake pads. Those have been the biggest gain for me and produced great power and modulation gains. I've been running the Veshrah RJL pads as a good compromise between good performance and warm up time. I just took my friends L2 750 for a sprint and was impressed with his brakes. Stock brakes with S/S lines and RJL-XX pads. Wonderful!
There are several other brands out there such as EBC that are well thought of.
Last would be to make sure you have fresh fluid and the system is well bled.

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Originally Posted by Jon Willette View Post
Also though the chain and sprockets are fine right now, I was considering switching to aluminum 520. Don't get me wrong the bike is faster than I can ride it, but I wouldn't mind a little more power in some areas. How noticeable do you think the increase in power will be by lightening the rotating mass? Also maybe go up a tooth in the rear since the acceleration in the lower gears is already insane, anyone have any experience? That's just a thought I'm fine with stock gearing.
Are you asking just about the aluminum rear sprocket and you already have a 520 set up on the bike?

Changing to an aluminum rear sprocket would produce no noticeable performance change. Going up a tooth would reduce the final drive ratio and make it insanerer but hardly noticeable.

Last, an aluminum 520 sprocket on a 1k does not last very long.

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Originally Posted by Jon Willette View Post
Last but not least what other performance mods would you guys recommend? Has power commander 5, k&n filter, and full yoshi. And before anyone recommends it, I'm already taking another course this year! Thanks.
I've always heard that the best performance mod is between the ears and on the saddle. Trying to squeeze out a few horsepower is only important in very limited situations.

I'm assuming you mean a riders course. Yes, spend the money there. Look into a local track day. It will be an eye opening, enlightening and humbling experience all in one. It is capable of teaching you so much more than a parking lot course can.
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post #3 of 8 (permalink) Old 04-11-2019, 06:04 AM
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Braided brake lines are the first thing I do to any bike. As @rv6john mentioned, probably look at different pads too and make sure you have it all bled properly. I don't think you'll notice anything from a 520 conversion. You could play with the gearing itself if you want it to feel different.

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post #4 of 8 (permalink) Old 04-11-2019, 06:28 AM Thread Starter
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Quote:
Originally Posted by Jon Willette View Post
So I love my K9 1000. Handles great, throttle is smooth and extremely responsive, and the bike is insanely fast. My main concern is I feel it is lacking a little in the brake department. Was thinking of going with SS lines, maybe brembos as well?
If you still have the stock brake lines, the SS lines are a nice upgrade which may make the lever a little firmer and easier to modulate. Personally, I did not see much change on my track bike when I changed to them but maybe my OEM lines were still in pretty decent shape.

Before spending any big money, try some aftermarket brake pads. Those have been the biggest gain for me and produced great power and modulation gains. I've been running the Veshrah RJL pads as a good compromise between good performance and warm up time. I just took my friends L2 750 for a sprint and was impressed with his brakes. Stock brakes with S/S lines and RJL-XX pads. Wonderful!
There are several other brands out there such as EBC that are well thought of.
Last would be to make sure you have fresh fluid and the system is well bled.

Quote:
Originally Posted by Jon Willette View Post
Also though the chain and sprockets are fine right now, I was considering switching to aluminum 520. Don't get me wrong the bike is faster than I can ride it, but I wouldn't mind a little more power in some areas. How noticeable do you think the increase in power will be by lightening the rotating mass? Also maybe go up a tooth in the rear since the acceleration in the lower gears is already insane, anyone have any experience? That's just a thought I'm fine with stock gearing.
Are you asking just about the aluminum rear sprocket and you already have a 520 set up on the bike?

Changing to an aluminum rear sprocket would produce no noticeable performance change. Going up a tooth would reduce the final drive ratio and make it insanerer [IMG class=inlineimg]/images/GSXR_toucan/smilies/tango_face_grin.png[/IMG] but hardly noticeable.

Last, an aluminum 520 sprocket on a 1k does not last very long.

Quote:
Originally Posted by Jon Willette View Post
Last but not least what other performance mods would you guys recommend? Has power commander 5, k&n filter, and full yoshi. And before anyone recommends it, I'm already taking another course this year! Thanks.
I've always heard that the best performance mod is between the ears and on the saddle. Trying to squeeze out a few horsepower is only important in very limited situations.

I'm assuming you mean a riders course. Yes, spend the money there. Look into a local track day. It will be an eye opening, enlightening and humbling experience all in one. It is capable of teaching you so much more than a parking lot course can.
Sorry John I meant going down a tooth in the rear. Just a typo.

And I was thinking a full vortex aluminium 520 kit. Or even just a steel 520 kit should be a little lighter plus an advantage over the stock 530 chain and sprockets right?

And I agree becoming a better rider is the best mod you can do. But there's nothing wrong with doing that and adding a little power as well lol. I would just like to be a little faster than some of the other guys when I need it is all, just because you have a lot.of power at your finger tips doesn't mean you need to use it. Not that I'm out here racing or anything lol.

Also I'll try that out with the brakes. They aren't too bad but I wouldn't mind them being a little better. And track days are definitely in my future but will likely build a dedicated track bike.

Thanks John
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post #5 of 8 (permalink) Old 04-11-2019, 07:20 AM
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I would avoid vortex aluminum rear, their steel may be ok but thier aluminum is crap. As for your brakes definitely do SS lines and fluid change (your bike is 10 years old) so this should help them feel firmer. Then better pads like mentioned above the Vesrah RJL-XX are great and that's what I use as they have good life and stopping power. Next, if you still want more look at going with a Brembo master cyclinder. As long as your caliper pistons are not sticking those should be sufficant for street use.

As for going to a 520 chain on a 1k I see no problem on a street/track bike with proper chain maintenance. If your running NOS and built for 1/4 mile runs then stay 530 otherwise go with a good chain/sprocket and drop some rotational mass.

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Last edited by coreyyok; 04-12-2019 at 06:45 PM.
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post #6 of 8 (permalink) Old 04-11-2019, 08:15 AM
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You will save about 1 pound going from the average 530 chain to 520. Add a bit more for the sprocket.

While this is not an insignificant amount of weight that must be accelerated, it is at the significant cost of loss of durability.

It is worth it racing and maybe upper level track riders, but otherwise.....

The issue is not the strength of the chain but reducing the chain/sprocket contact area by a 1/3.
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post #7 of 8 (permalink) Old 04-11-2019, 10:50 AM
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Good Morning Jon, et. al.,

On my K5 Literbike I have now, I have yet to add the SS braided lines, and I'll do those pads mentioned while I'm at it. For me, it still stops well so I'm not in a big hurry. The K5 LIterbike I just sold had some Vesrah SS lines that I added.

ON the one I have now- I have had the ECU flashed via the mail to Dallas.
I have the K&N air cleaner also. I have had it dynoed, and it had a nice steady power curve and torque curve, with a good a/f ratio also.
The dyno-er said he really liked the way the graph looked and said I should be real happy with it. He said it looked like a flashed ecu too.
It was in the 90'sF in his dyno room, kinda humid, and I was running off the 10% ethanol Premium. IIRC- it made 158 RW HP I was hoping for a bit more.
He said with no ethanol premium and a cooler dryer day- I would have been in the 160's, 170's, at the RW. For basically a stock engine- still not bad.

I asked since he felt my a/f was good all the way thru, if I needed or should get a PC V. He stated that he didn't feel I needed it and wouldn't recommend it for my bike at the time. And yes, he does use them on some of his personal bikes, and does do dyno tunes with his dyno and PC's.

I have done the 520 Driven conversion on this one too. Not really sure why, other than it needed a new chain, and I did the sprockets too.
I also did a -1,+1. ** But, I have also gone with a Dunlop Q3+ 190/55.
The 55 rear profile is like taking away ~1-2 tooth on the rear.- Longer gearing.
So the -1, +1 makes it just slightly shorter than the stock ratio set up, w/ the 55 rear profile tire.

IMHO, I would not make my gearing longer as you stated- JMO though.

Having the 520 with aluminum rear sprocket on my bike now. ( I think the Blue colored rear sprocket does add 10 HP though ), I wouldn't really recommend it.

I didn't need the PAIR valve mod since they disabled it on my flash. Supposed to add 1-2 RWHP.
I don't have the SET exhaust valve either, and K5 didn't have a Cat.
I have a Yoshi full carbon exhaust slip on a Ti midpipe, stock Ti header.

Without doing some internal stuff to the motor, cams, porting, milling head, etc.
Hard to squeeze much more out of a stock motor, that already is so efficiently powerful.

YMMV, good day to all, I hope any of that helped,
Todd

K5 1000 #2.0- ECU flash; Yoshi Muffler, Ti Midpipe; Q3+ 190/55 rear; 520 chain -1/+1; GP Shifting
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Last edited by Todd_Sails; 04-11-2019 at 10:53 AM.
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post #8 of 8 (permalink) Old 04-12-2019, 03:28 PM Thread Starter
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Thanks a lot Todd! First hand info is what I was looking for. I would definitely think your bike is making more power than that. Especially a K5. I've told you before that this bike has a full yoshi, power commander 5, I just did a K&N air filter because it had a stock filter that was filthy. Definitely a noticable gain. I just ordered pirella diable supercorsa's v2 for it. Felt it in my chest when I had to pay for them. I kept the rear 50 and yes I will likely stay stock gearing just considering the 520 chain. Riding is purely recreational for me though I try to ride every day and commute 8 miles to work. If have to change chain and sprockets often as well as tires I don't really care. I'm changing the oil ever 1000 miles as is. Changed it once already as well as the filter while I had the fairing pulled off. That one was only at 500 miles since I've owned it but I had been beating the piss out of her anyways lol. Anymore advice would he greatly appreciated as well. Thanks!

What do you guys think of a full pnp on the head? What cams and valves?? Just a thought maybe for next winter.
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