Need more lower end power!!!

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Need more lower end power!!!

Postby Joedoom » Fri Dec 27, 2013 12:33 am

I've finally completed the cosmetic portion, (prob should have done the mechanical mod's first). Now I need to get the power to match the look. I don't really care about the mpg since I don't use my cat to commute, purely for enjoyment.

My cat is a 2005 with 7k miles. Everything mechanically is stock. I've done some research and have a good idea of what I want to do. However, I would enjoy the opinions of the guys that have done these modes and would appreciate any other mods that I haven't heard or thought of.

The two mod's I'm looking at doing are a sprocket and chain conversion. What is the best ratio to get the Most power?

Also, I'm going to jet the carbs. Is there any particular jet that would get me that MOST power? I'm thinking dynojet, but which?

Again, I am open to any and all suggestions on these mod's or any other mod's that you guys can think of to make the bike feel as mean as I think it looks.

Almost forgot, I've read here and there about guys extending there swing arms but I haven't read anything in that regard referencing a Tcat. Has anyone heard or done this? If so, what swing arm did you use?

Thanks :rockon
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Re: Need more lower end power!!!

Postby KBacon » Fri Dec 27, 2013 5:46 am

It really depends on what you mean by "more power"... as everything is compromises...

Sprockets (gearing) won't give you "more" power... but will move your power band depending on the gear ratio... the common 'upgrade' is -1/+2 or going from the stock 15/47 to 14/49. This gives you more low end power... but less top speed... and higher revs @ a given speed... when cruising @ 60mph I constantly felt myself wanting to shift to 7th... check out www.gearingcommander.com for what effects different ratios will have...

And at the same time going from a 530 w/ steel rear sprocket to a 520 w/ aluminun rear sprocket... cuz a 520 is narrower... it is lighter & the aluminim rear sprocket is lighter than steel... the downfall is thd alumimun wears much faster!!!

The best jet kit is arguably the Ivans for this bike w/ the 152-155-155-152 jet set up & needles on the middle slot...

My current setup is 14/47 (-1 front.. stock rear) 520 steel sprockets & chain... lighter chain & sprockets... but still steel for longevity... and had ivans jet kit setup like above...

PS Stay away from k&n air filters... the do not increase power on these bikes & like to split down the rubber seam almost immediately after install... the stock Yamaha filters are actually known to make more power & hold up much better!!!
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Re: Need more lower end power!!!

Postby Bikevouwer » Fri Dec 27, 2013 6:18 am

Joedoom wrote:I've finally completed the cosmetic portion, (prob should have done the mechanical mod's first). Now I need to get the power to match the look. I don't really care about the mpg since I don't use my cat to commute, purely for enjoyment.

My cat is a 2005 with 7k miles. Everything mechanically is stock. I've done some research and have a good idea of what I want to do. However, I would enjoy the opinions of the guys that have done these modes and would appreciate any other mods that I haven't heard or thought of.

The two mod's I'm looking at doing are a sprocket and chain conversion. What is the best ratio to get the Most power?

Also, I'm going to jet the carbs. Is there any particular jet that would get me that MOST power? I'm thinking dynojet, but which?

Again, I am open to any and all suggestions on these mod's or any other mod's that you guys can think of to make the bike feel as mean as I think it looks.

Almost forgot, I've read here and there about guys extending there swing arms but I haven't read anything in that regard referencing a Tcat. Has anyone heard or done this? If so, what swing arm did you use?

Thanks :rockon


Go out and get yourself a 1000 cc 2 cylinder more bottom power isn't possible on a bike. The Cat is a 600 cc high revs engine, bottom power is surprisingly good for this engine, but in order to get more bottom power you have to increase cylinder size .
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Re: Need more lower end power!!!

Postby carboncat » Fri Dec 27, 2013 1:51 pm

or compression
munch wrote:i would say ditch the kid and come to the gap because usually the kids dont want to be embarrassed by their parents but you're prob such a cool pops that you'll be passed out on a sorority house lawn, naked, with fridge magnets stuck to the pins in your ankle and a couple hotties snorting blow off your chest. who wouldnt want a father like that to join them on the start of their college edumacation :cheers
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Re: Need more lower end power!!!

Postby Reserector » Fri Dec 27, 2013 2:14 pm

KBacon wrote:It really depends on what you mean by "more power"... as everything is compromises...
!

He said "MOST" power.

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Re: Need more lower end power!!!

Postby Insulinboy » Fri Dec 27, 2013 3:57 pm

Bikevouwer wrote:Go out and get yourself a 1000 cc 2 cylinder



Thats what I did.. it was an awesome mod :)

In all seriousness, what are you wanting to do with the bike? do you take it to the twistys, are you just planning on stunting with it, acting like a jackass and just doing wheelies from stoplight to stop light?

These are things that could help people tell you which way to go

KBacon wrote:Sprockets (gearing) won't give you "more" power... but will move your power band depending on the gear ratio... the common 'upgrade' is -1/+2 or going from the stock 15/47 to 14/49. This gives you more low end power... but less top speed... and higher revs @ a given speed... when cruising @ 60mph I constantly felt myself wanting to shift to 7th... check out www.gearingcommander.com for what effects different ratios will have...


This is both right and wrong. If you dyno'ed a bike with two different sets of sprockets the dyno would show the exact same curve to the power because you aren't doing anything to change the characteristics of the engine, your just changing the gearing advantage that the engine has to the rear wheel. The Dyno will show more power, it just wont show the curve any differently. 14/49 is the popular gearing to go with, but for my track bike I have a shatload of sprockets to gear for different tracks, 13, 14, and 15t fronts, and everything from 46-50t rears.

You can go with a 520 chain and sprockets as well, cheaper and wont last half as long as the stock 530 but it also gives the engine a huge advantage in shaving weight from the rotating mass, having someone mill some weight off the flywheel is a popular mod in the VTR forum, again no difference in curve but it helps the motor spool up faster because there isn't that extra weight the motor has to push. It really does make a HUGE improvement just milling a few oz off the flywheel, it also makes the bike much more jerky however.

I was in the same boat, I wanted more bottom end and was willing to sacrifice off the top to get it. My VTR1000 weighs the same as the cat, only has 15 more hp, but makes an extra 20 ft. lbs of torque at 2k rpm. in my opinion V-twins make a much more functional street bike because they build power at street RPM's and you dont have to be revving your brains out to be in the power. But as far as 4 cylinders go, there isn't a 600 super sport 4 cylinder on the planet that I'm aware of that makes as much bottom power as the YZF does
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Re: Need more lower end power!!!

Postby Joedoom » Thu Jan 02, 2014 10:27 pm

Thanks everyone for the quick reply. I apologize for taking a couple of days to answer, you know how the holidays are.
As for more lower end power, I guess it would help to be a little more specific. I'm looking to gain more power on the lower gears. I'm not looking to pop wheelies from street light to street light. Lol I'm too old for that.

The reason being is that I use my bike simply to go out on quick rides, one to two hours at the most. I want to feel that quick throttle response when coming out of a turn, maybe raise the front tire just a bit off the ground from time to time without having to pop my clutch. I understand that most people would go buy a bigger bike but I don't want to. I've already invest too much time and money into transforming the bike the way I like it, (cosmetically). Plus, I was able to pick it up for a measly $2,000 with only 6k miles on it!!!!

So other then the Jet Swap and the sprocket conversion, is there anything else I could possibly do to get that extra little pop? No, I'm not swapping the motor nor am I taking it in to get it bored out, etc....

As far as the swing arm extension? Anyone?

One last thing. I want to put some more rubber on the ground. Any suggestions on whats the best/biggest size tires I can possibly put on my bike and still retain the MOST stability and control?

Thanks to everyone. So far you all have been a huge help. I am looking at replacing the Jets this weekend. Wish me luck!!! :rockon
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Re: Need more lower end power!!!

Postby KBacon » Fri Jan 03, 2014 7:16 am

Extended swingarms are meant for drag racing & keeping the front end down on high hp bikes... many people do it just for the "look"... the downside is that it ruins the handling of the bike, pointless on the yzf, hard to find for this bike, & looks retarded!!!

The yzf comes with 160-60-17 rear tire & 120-60-17 front tire... 170-60-17 rear tire will fit easily... but is a less common size and maybe a little harder to find (slightly)...

180-55-17 is more common on the newer sport bikes w/ 5.5" rims.... but becomes pinched on the yzf's 5" rim and will not handle as well...

Some tires have a wider foot print than others... for instance a Dunlop q2 is about 3/4" wider than a michelin power3 in the stock 16-60-17...
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Re: Need more lower end power!!!

Postby carboncat » Fri Jan 03, 2014 10:17 am

Joedoom wrote:Thanks everyone for the quick reply. I apologize for taking a couple of days to answer, you know how the holidays are.
As for more lower end power, I guess it would help to be a little more specific. I'm looking to gain more power on the lower gears. I'm not looking to pop wheelies from street light to street light. Lol I'm too old for that.

The reason being is that I use my bike simply to go out on quick rides, one to two hours at the most. I want to feel that quick throttle response when coming out of a turn, maybe raise the front tire just a bit off the ground from time to time without having to pop my clutch. I understand that most people would go buy a bigger bike but I don't want to. I've already invest too much time and money into transforming the bike the way I like it, (cosmetically). Plus, I was able to pick it up for a measly $2,000 with only 6k miles on it!!!!

So other then the Jet Swap and the sprocket conversion, is there anything else I could possibly do to get that extra little pop? No, I'm not swapping the motor nor am I taking it in to get it bored out, etc....

[b]As far as the swing arm extension? Anyone?[/b]

One last thing. I want to put some more rubber on the ground. Any suggestions on whats the best/biggest size tires I can possibly put on my bike and still retain the MOST stability and control?

Thanks to everyone. So far you all have been a huge help. I am looking at replacing the Jets this weekend. Wish me luck!!! :rockon

yup , I :lol
munch wrote:i would say ditch the kid and come to the gap because usually the kids dont want to be embarrassed by their parents but you're prob such a cool pops that you'll be passed out on a sorority house lawn, naked, with fridge magnets stuck to the pins in your ankle and a couple hotties snorting blow off your chest. who wouldnt want a father like that to join them on the start of their college edumacation :cheers
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Re: Need more lower end power!!!

Postby munch » Fri Jan 03, 2014 10:53 pm

with an extended swingarm...
knee resting association
elbow resting association

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