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Wiseco Piston Kit

wpkit.jpg


Just found this today. anyone willing to pull the trigger make the buy and report back with HP gain numbers? sounds like the best upgrade for the FZ07 engine, most likely the biggest HP increase you could do giving you more HP then exhaust or air cleaner.
 

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There is no bigger increase in performance than a full exhaust system and a fuel controller. You won't get +6 hp with a higher compression piston only.

Why are bigger pistons and higher compression pistons of such interest? It's more cost effective to take riding lessons or improve the suspension.
 

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Discussion Starter #3
There is no bigger increase in performance than a full exhaust system and a fuel controller. You won't get +6 hp with a higher compression piston only.

Why are bigger pistons and higher compression pistons of such interest? It's more cost effective to take riding lessons or improve the suspension.
I beg to differ, higher comp pistons can bring in big HP gains. One example are the 125cc pit bike engines. Standard comp is about 10.5 :1 They put out about 8-9Hp. then there are the 125cc high comp pit bike engines. These engines are 13.5 :1 and put out 17-18hp. A really big gain! In the pit bike engine world exhaust n intake only net a few HP. The big HP comes with big bore kits, or high comp engines. I guess we won't know what kind of HP numbers these 12.5:1 pistons will put down until someone installs a set. Of course adding exhaust and intake would be beneficial along with these pistons, and I would most likely do all three. Why not just buy a fz-09 you say? I heard in the states they are only 1000usd more, but this is Taiwan. The Fz-09 is nearly 3500usd more then the fz-07 here due to import tax restrictions and the fz-07 being made in Taiwan and the fz-09 being made in another countries factory. Also I like the looks/ lightness of the fz-07 over the fz-09. It would be a perfect bike if it could get a 20hp boost. looking at ways to make that happen....
 

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I beg to differ too. None of us know for sure whether the stock frame and forks and transmission etc can handle another 20 horsepower that is wasn't designed for. It will handle another 6hp just fine if you have suspension upgrades...but adding another 12 hp to that would likely overwhelm the frame and forks. I don't see why a person would need another 20 hp on a FZ07. If a person knew how to ride properly...he could make up for 20 hp with skill...not money.
 

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if you look for extra hp buy a fz-09 dont waste your money on exhaust , fuel controller and boring with high compression pistons.
 

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How much more HP does an FZ-09 have? Pay 3500usd more in Taiwan for a FZ-09? Also reviews say it kinda handles odd.
If I can get 20hp for much less then 3500usd then its cheaper and better for me to just buy a FZ-07. I think if I do piston install myself, 400usd, ecu, 300-500usd and exhaust 500-1000usd then totally i'm in it for less then 2000usd with all upgrades. It's to bad the fz-09 costs 3500usd more then a fz-07 in Taiwan specifically. I'm sure this is not the case in the rest of the world. Even if the fz-09 was the same price as the fz-07 i'd still most likely just buy a fz-07 since it's lighter and the riding position is lower and less funky then the fz-09 riding position.
 

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TaipeiRyan.... if you want to hop up an FZ07...that's your business and good luck with your project , but your calculations are seriously flawed. You forgot the cost to bore the cylinders...the cost to change the engine timing for the higher compression...the real cost of an full exhaust {$900 USD} and the cost of a fuel controller and someone to make a fuel map on the dyno. So your figures are at least $1000.00 short of reality. In addition...you will need suspension work and tires. You'll end up spending $2000.00 MORE than the cost of a new FZ09 before you are done.
My opinion is that the FZ07 is not the bike to choose to drag race your buddies. You'd be better off with a used R6 OR R1.....
 

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Discussion Starter #8
TaipeiRyan.... if you want to hop up an FZ07...that's your business and good luck with your project , but your calculations are seriously flawed. You forgot the cost to bore the cylinders...the cost to change the engine timing for the higher compression...the real cost of an full exhaust {$900 USD} and the cost of a fuel controller and someone to make a fuel map on the dyno. So your figures are at least $1000.00 short of reality. In addition...you will need suspension work and tires. You'll end up spending $2000.00 MORE than the cost of a new FZ09 before you are done.
My opinion is that the FZ07 is not the bike to choose to drag race your buddies. You'd be better off with a used R6 OR R1.....
The Wiseco pistons are designed to be higher compression by its height/machine surface. They are 80mm 689cc stock bore. So you wouldn't need to bore the engine just pay about 420 (hah) dollars for two wiseco pistons since there 210usd a piece. I don't think timing would need to be adjusted going up in compression just from 11.5 to 12.5 and if it did it would be minimal. Costs of exhaust are subjective to brands and what not, but you can get a slip on and de-cat for less then 1000 bucks or go with a full titanium unit but exhaust is something you don't have to spend the big bucks on, you can go cheap/custom/ebay knock offs and still they flow about as much air as a top of the line brand name exhaust, just might no be as high quality/ durable but get the job done. Ok on to the next thing ECU fuel controller, I would pay no one to tune map my bike because my plan was to get an ECU and a auto-tune add on these together sale for about 500 bucks. No tuning personal or extra tuning money needed, bike tunes itself.

So i'm still at 1820usd after your quote of 900usd for exhaust, piston install,(420usd piston costs) ( do it myself) and tune. (300 ECU controller + 200usd autotune add on)
Stock suspension is fine for me, and tires. Something I don't feel I need to do right away. Also not looking to drag race. I like the FZ-07 to begin with, i just wan't to make it better. I don't like the Fz-09 to begin with, although it's cool they are making triples +1 for that, just not into the bikes looks and riding position. The Fz-07 has the winning looks and riding position. If they put the FZ-09's engine into the FZ-07s that would be the perfect bike.

To spend 2000usd more then the cost of a new fz-09 means I would need to spend 5000usd in upgrades on the fz-07. I don't see myself spending that much.
Taiwan prices.
2015 fz-07 360,000ntd=10,959usd
2015 fz-09 460,000ntd=14,002usd
 

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I beg to differ, higher comp pistons can bring in big HP gains. One example are the 125cc pit bike engines. Standard comp is about 10.5 :1 They put out about 8-9Hp. then there are the 125cc high comp pit bike engines. These engines are 13.5 :1 and put out 17-18hp. A really big gain! In the pit bike engine world exhaust n intake only net a few HP. The big HP comes with big bore kits, or high comp engines. I guess we won't know what kind of HP numbers these 12.5:1 pistons will put down until someone installs a set. Of course adding exhaust and intake would be beneficial along with these pistons, and I would most likely do all three. Why not just buy a fz-09 you say? I heard in the states they are only 1000usd more, but this is Taiwan. The Fz-09 is nearly 3500usd more then the fz-07 here due to import tax restrictions and the fz-07 being made in Taiwan and the fz-09 being made in another countries factory. Also I like the looks/ lightness of the fz-07 over the fz-09. It would be a perfect bike if it could get a 20hp boost. looking at ways to make that happen....
Ryan: have you seen this thread? It's exactly what you hoped for 20 hp more than stock at 88.55 at the rear wheel on 87 octane. If you don't want to open up the motor you can get 80 hp at the wheel with "horboys" airbox replacement a Yosh pipe and tuning. Sweet!

FZ-07 Dyno Testing

I'm with you, it would totally be worth the money, the FZ-07 is a great bike. I love my FZ-09's but I plan on having a nicely modded FZ-07 in the stable as well, I love parallel twins.

Also check out "horboys" pics for more info, and his website.

FZ-07 airbox

HPR - Hordpower, Art of Twins
 

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Good grief, why would anyone want to turn up the wick on this bike? 70 hp at <400lbf!! I can understand a Harley 880 upped to a 1000cc, or bunging E3134 cams and 10.5:1 into a T120 Bonnie, but an Fz-07?? Even if you did, and speaking professionally, upping the CR may not, of itself, improve the output. It's already at 11.5:1 and even if you are OK with reduced reliability you will need to adjust the fuelling and likely the ignition timing to prevent a holed piston.
Anyway, even if you think I'm wrong and you get, what, 80-90hp out of the beast, I hope for your sake the suspension holds up. You might end up with an FZ-09.
 

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Yes, see my post above, and use your cursor over the links and click on them. There are three links.
 

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oh nice, thx mate, I didn't see that they are links on my phone app.
20hp over stock is pretty impressive for the little bike!
I am still waiting for my new suspension to arrive from germany before i will take her to some track days, but will def keep that in mind !
 

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No problem, almost 90 hp is impressive. But you can get 80 hp without even removing the head.
 

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I don't think 90 is too much for this bike.

I had a Laverda 750 Formula vertical twin, with a pipe that made 90 at the rear wheel on a local dyno, years ago.

The fun of getting some more ponies out of a small bike is in " racing " the bigger ones in the twisties. :)
 

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I don't think 90 is too much for this bike.

I had a Laverda 750 Formula vertical twin, with a pipe that made 90 at the rear wheel on a local dyno, years ago.

The fun of getting some more ponies out of a small bike is in " racing " the bigger ones in the twisties. :)
I agree, who wouldn't like to get a little more power out of their bike. There's always at least one grumpy nay sayer telling you that will never work or that's stupid. Put a sock in it nay sayer!!
 
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