JUst wondering who if anyone is running the 508 stroker kit?
and How do you like it

 

do a search on the daddogriders in google, they run the 508 and have some vids and a great website for the YFZ...

 

Ya I actually got to meet the dogs at StAnthonys Was wondering if anyone was running the Stroker setup

 

yea they have the 508 stroker from falicon on one of there bikes, Am i wrong...?

 

Daddogs have a vid on stock yfz vs 480 vs 508. The 480 on NOS barely loses to the 508, but its flat ground. I think the 508 would be better hill shooting more tourqe. If you decide to bigbore you YFZ go with cp470 bore, their 480 piston is only 1 singe wring piston and I heard they have to change them out every couple months.

 

The falicon 480 is just crank stroke and the 508 is crank and conecting rod I watched the 508 climbing choke and the 480 they didnt quite have the 508 dialed in when I was there but the 480 ran at 42 MPH I . I had radar in hand.
not to mention there great looking bikes they run huge rear paddles 25/12/9 13 paddle
seems like alot for a single 4 stroke but they do WELL

 

If you get 470 + stroking, will be around 500cc. I heard they have 530cc bore now, I think its 101 piston bored.

 

You can NOT bore the stock cylinder past a 99mm which is the 480, and I am not aware of an aftermarket cylinder besides Tumic but they stoped making those cylinders for some reason?!?

 

>> The falicon 480 is just crank stroke and the 508 is crank and conecting rod

Well, not exactly. The Falicon stroker crank is a crank and rod combination. The longer rod has no effect on displacement, but it does control the position of the top of the piston at top dead center. The crank requires a longer-than-stock length to prevent the piston from hitting the crank at the bottom of the stroke.

The Falicon 488 kit is a stroker crank with long rod, and a 97mm big bore cylinder/piston.
The DogRiders 508 is the same crank & rod, with a 99mm big bore cylinder/piston.
The DogRiders 480 is a stock stroke crank, with a 99mm big bore cylinder/piston.

The 480 is 9% bigger then the 450 (actually a 440). The 508 is 5% bigger than the 480. So, if it was just a matter of engine size, you'd expect to see the 480 closer to the 508 than the stock YFZ. But instead the 480 is only slighly faster than the stocker, while the 508 appears to open a rather large gap on both.

As you can see from their videos, the stroked engine is much faster. Why did they choose the 99mm cylinder over the 97mm cylinder? Simple. They purchased the 99mm bore first, before Falicon had anything available. Looking for more power, they purchased a crank to add to the 99mm cylinder. Why buy another cylinder when all they need is a crank.

Why use a 97mm and not a 99mm cylinder? The chief engineer at Falicon believes the 97mm cylinder will run better, due to a better bore/stroke ratio. When you keep making the cylinder wider, you increase the time it takes to burn the fuel/air mixture. At some point you get diminishing returns - in other words, it takes too long to burn the mixture and you no longer get an increase in power. But if you increase the stroke, you have the same burn time, but a larger displacement.

Here's the bore stroke ratios:
Stock YFZ-450 95mm/62mm = 1.53
480 big bore 99mm/62mm = 1.60
Dogrider 508 99mm/66mm = 1.48
Falicon 488 kit 97mm/66mm = 1.47

Now, an interesting test would be to race the 488 vs. the 508.

Disclaimer: I'm the webmaster for Falicon. But I am not an engineer, and I'm not real smart. Consult a professional engine builder for advice. Your milage may vary. See your physician before starting any exercise program. Crashing at high speed may cause some discomfort.

 

Love to hear the input . By the way very nice website! And I love what Falicon has done for the raptors . Hope to see more .
Ar they selling many kits? heard any negatives?